一、SCI 4条
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Title: Coefficient of Earth Pressure at Rest of a Saturated Artificially Mixed Soil from Oedometer Tests
Authors: Wang, JJ; Yang, Y; Bai, JP; Hao, JY; Zhao, TL
Author Full Names: Wang, Jun-Jie; Yang, Yang; Bai, Jiping; Hao, Jian-Yun; Zhao, Tian-Long
Source: KSCE JOURNAL OF CIVIL ENGINEERING, 22 (5):1691-1699; 10.1007/s12205-017-1811-3 MAY 2018
Language: English
Abstract: The present study focuses on the coefficient of earth pressure at rest (K-0) of a saturated crushed binary soil mixture. The mixture is artificially mixed by crushed sandstone and mudstone particles according to presupposed weight ratios and particle size distribution curves. The oedometer tests are performed to determine the coefficient K-0. From test data, the values of coefficient K-0, which range from 0.242 to 0.381, with a mean value of 0.300, are obtained. Just as other mechanical parameters of soils, the K-0 value is affected by many factors. The effects of the properties of test specimen and material are discussed on the basis of the test data. Strong negative correlation between the values of K-0 and initial dry bulk density of test specimen, one between the values of K-0 and median particle size diameter of test material, and one between the values of K-0 and gravel content by weight of test material, respectively, are observed from the test data. The mudstone particle content by weight of the mixture may also affect the value of K-0. The effects of these factors on the K-0 value may exhibit interlocking effect. Higher interlocking effect results in higher shear strength, and therefore results in lower K-0 value.
ISSN: 1226-7988
eISSN: 1976-3808
IDS Number: GE2NT
Unique ID: WOS:000431052600017
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Title: The simulation of the warpage rule of the thin-walled part of polypropylene composite based on the coupling effect of mold deformation and injection molding process
Authors: Zhang, JX; Yin, XY; Liu, FZ; Yang, P
Author Full Names: Zhang, Jixiang; Yin, Xiaoyi; Liu, Fengzhi; Yang, Pan
Source: SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS, 25 (3):593-601; 10.1515/secm-2015-0195 MAY 2018
Language: English
Abstract: Aiming at the problem that a thin-walled plastic part easily produces warpage, an orthogonal experimental method was used for multiparameter coupling analysis, with mold structure parameters and injection molding process parameters considered synthetically. The plastic part deformation under different experiment schemes was comparatively studied, and the key factors affecting the plastic part warpage were analyzed. Then the injection molding process was optimized. The results showed that the important order of the influence factors for the plastic part warpage was packing pressure, packing time, cooling plan, mold temperature, and melt temperature. Among them, packing pressure was the most significant factor. The optimal injection molding process schemes reducing the plastic part warpage were melt temperature (260 degrees C), mold temperature (60 degrees C), packing pressure (150 MPa), packing time (2 s), and cooling plan 3. In this situation, the forming plate flatness was better.
ISSN: 0792-1233
eISSN: 2191-0359
IDS Number: GE3QV
Unique ID: WOS:000431128700016
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Title: Painlev,-Kuratowski Stability of the Solution Sets to Perturbed Vector Generalized Systems
Authors: Peng, ZY; Zhao, Y; Yang, XM
Author Full Names: Peng, Zai-yun; Zhao, Yong; Yang, Xin-min
Source: ACTA MATHEMATICAE APPLICATAE SINICA-ENGLISH SERIES, 34 (2):304-317; 10.1007/s10255-018-0743-0 MAR 2018
Language: English
Abstract: In this paper, stability results of solution mappings to perturbed vector generalized system are studied. Firstly, without the assumption of monotonicity, the Painlev,-Kuratowski convergence of global efficient solution sets of a family of perturbed problems to the corresponding global efficient solution set of the generalized system is obtained, where the perturbations are performed on both the objective function and the feasible set. Then, the density and Painlev,-Kuratowski convergence results of efficient solution sets are established by using gamma convergence, which is weaker than the assumption of continuous convergence. These results extend and improve the recent ones in the literature.
ISSN: 0168-9673
eISSN: 1618-3932
IDS Number: GE2EY
Unique ID: WOS:000431029600008
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Title: Bolt Detection Signal Analysis Method Based on ICEEMD
Authors: Guo, CH; Zhang, Z; Xie, X; Yang, ZY
Author Full Names: Guo, Chunhui; Zhang, Zhan; Xie, Xin; Yang, Zhengyu
Source: SHOCK AND VIBRATION, 10.1155/2018/1590983 2018
Language: English
Abstract: The construction quality of the bolt is directly related to the safety of the project, and, as such, it must be tested. In this paper, the improved complete ensemble empirical mode decomposition (ICEEMD) method is introduced to the bolt detection signal analysis. The ICEEMD is used in order to decompose the anchor detection signal according to the approximate entropy of each intrinsic mode function (IMF). The noise of the IMFs is eliminated by the wavelet soft threshold denoising technique. Based on the approximate entropy and the wavelet denoising principle, the ICEEMD-De anchor signal analysis method is proposed. From the analysis of the vibration analog signal, as well as the bolt detection signal, the result shows that the ICEEMD-De method is capable of correctly separating the different IMFs under noisy conditions and also that the IMF can effectively identify the reflection signal of the end of the bolt.
ISSN: 1070-9622
eISSN: 1875-9203
Article Number: 1590983
IDS Number: GE6CT
Unique ID: WOS:000431312300001
二、EI 13条
1. Investigation of functional group distribution of asphalt using liquid chromatography transform and prediction of molecular model
Accession number: 20181905143816
Authors: Ding, Yongjie (1, 2); Huang, Baoshan (2, 3); Shu, Xiang (2)
Author affiliation: (1) School of Civil Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Department of Civil and Environmental Engineering, The University of Tennessee, Knoxville; TN; 37996, United States; (3) School of Transportation Engineering, Tongji University, Shanghai; 201804, China
Corresponding author: Huang, Baoshan(bhuang@utk.edu)
Source title: Fuel
Abbreviated source title: Fuel
Volume: 227
Issue date: 1 September 2018
Publication year: 2018
Pages: 300-306
Language: English
ISSN: 00162361
CODEN: FUELAC
Document type: Journal article (JA)
Publisher: Elsevier Ltd
Abstract: The present study investigated functional group distribution of virgin and aged asphalt binder through liquid chromatography (LC) transform, a device that combines the functions of Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The corresponding molecular models of virgin and PAV aged asphalt components were constructed. The temperature-dependent density of the model was calculated to verify the accuracy of the model. The chemical structure of the components was evaluated using a series of indicators, including the aromatic index, the aging index, the C[dbnd]O index and the δ (CH3)/δ (CH3+ CH2). The structural changes of components with molecular weight of the virgin and aged asphalt were also analyzed. The molecular simulation results indicated that the molecular model developed in this study was consistent with real asphalt. ? 2018 Elsevier Ltd
Number of references: 37
Main heading: Asphalt
Controlled terms: Fourier transform infrared spectroscopy - Gel permeation chromatography - Indicators (chemical) - Liquids - Molecular mechanics - Molecular modeling - Molecular structure
Uncontrolled terms: Aging index - Asphalt binders - Functional group distributions - Gel permeation chromatography (GPC) - Molecular simulations - Temperature-dependent density
Classification code: 411.1 Asphalt
Asphalt
- 801 Chemistry
Chemistry
- 802.3 Chemical Operations
Chemical Operations
- 931.3 Atomic and Molecular Physics
Atomic and Molecular Physics
DOI: 10.1016/j.fuel.2018.04.065
Funding Details: Acronym; Sponsor: FHWA; Federal Highway Administration - Acronym; Sponsor: NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 51578415; TDOT; Tennessee Department of Transportation
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
2. Hydrologic performance of bioretention in an expressway service area
Accession number: 20181905169094
Authors: Gao, Jianping (1); Pan, Junkui (1); Hu, Ning (1); Xie, Chengzuo (1)
Author affiliation: (1) School of Civil Engineering, Chongqing Jiaotong University, 66 Xuefu Avenue, Nanan District, Chongqing; 400074, China
Corresponding author: Pan, Junkui(15303950218@163.com)
Source title: Water Science and Technology
Abbreviated source title: Water Sci. Technol.
Volume: 77
Issue: 7
Issue date: April 2018
Publication year: 2018
Pages: 1829-1837
Language: English
ISSN: 02731223
CODEN: WSTED4
Document type: Journal article (JA)
Publisher: IWA Publishing, 12 Caxton Street, London, SW1H 0QS, United Kingdom
Abstract: Bioretention can be an effective measure for stormwater treatment. However, there is a lack of systematic analysis of the impact of bioretention design parameters on hydrologic performance. Herein, SWMM and RECARGA models were applied to generate the typical annual rainfall runoff and simulate the water balance of the bioretention system in an expressway service area. The purpose of the investigation was to identify key design parameters for the bioretention system and delineate the priorities in developing the design. Results showed that the average groundwater recharge ratios for bioretention basins with and without an underdrain were 58.29% and 92.27%, respectively, the average overflow ratios were 4.13% and 4.19%, the average evapotranspiration ratios were 4.48% and 4.47%, and the average outflow ratio for bioretention with an underdrain was 33.94%. The ratio of the bioretention area to drainage area, and the saturated infiltration rates of planting soil and native soil were the main factors influencing water balance, while the underdrain diameter and gravel layer depth exerted little effect. Based on the impact analysis, multivariate nonlinear regression models of runoff reduction rate for two types of bioretention basin were established, which both exhibited high determination coefficients and acceptable Nash-Sutcliffe coefficients. ? 2018 The Authors.
Number of references: 21
Main heading: Infiltration
Controlled terms: Groundwater - Multivariant analysis - Regression analysis - Runoff
Uncontrolled terms: Bioretention - Determination coefficients - Expressway service area - Ground water recharge - Hydrologic performance - Key design parameters - Multivariate non-linear regression - Nash-Sutcliffe coefficient
Classification code: 444.1 Surface Water
Surface Water
- 444.2 Groundwater
Groundwater
- 922 Statistical Methods
Statistical Methods
- 922.2 Mathematical Statistics
Mathematical Statistics
DOI: 10.2166/wst.2018.048
Funding Details: Number; Acronym; Sponsor: 51378520; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
3. Reliability analysis of hydrologic containment of underground storage of liquefied petroleum gas
Accession number: 20181905176320
Authors: Gao, Xu (1); Yan, E-Chuan (1); Yeh, Tian-Chyi Jim (2, 3); Wang, Yuli (3); Liang, Yue (4); Hao, Yonghong (2)
Author affiliation: (1) Faculty of Engineering, China University of Geosciences, Wuhan; 430074, China; (2) Key Laboratoryfor Water Environment and Resources, Tianjin Normal University, Tianjin, China; (3) Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson; AZ; 85721, United States; (4) National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing; 400074, China
Corresponding author: Yeh, Tian-Chyi Jim(yeh@hwr.arizona.edu)
Source title: Tunnelling and Underground Space Technology
Abbreviated source title: Tunn. Undergr. Space Technol.
Volume: 79
Issue date: September 2018
Publication year: 2018
Pages: 12-26
Language: English
ISSN: 08867798
Document type: Journal article (JA)
Publisher: Elsevier Ltd
Abstract: The objectives of this paper are (1) to introduce a numerical first order method to calculate the gas containment reliability within a heterogeneous, two-dimensional, unlined rock caverns (URCs), and (2) to suggest a strategy for improving the gas containment reliability. In order to achieve these goals, we first analyzed the spatial variability of saturated hydraulic conductivity (Ks) at a field site. We then conducted deterministic simulations to demonstrate the importance of heterogeneity of Ksin the analysis of gas tightness performance of URCs. Considering the uncertainty of the heterogeneity in the real world situations, we subsequently developed a numerical first order method (NFOM) to determine the gas tightness reliability at crucial locations of URCs. Using the NFOM, the effect of spatial variability of Kson gas tightness reliability was investigated. Results show that as variance or spatial structure anisotropy of Ksincreases, most of the gas tightness reliability at crucial locations reduces. Meanwhile, we compare the results of NFOM with those of Monte Carlo simulation, and we find the accuracy of NFOM is mainly affected by the magnitude of the variance of Ks.At last, for improving gas containment reliability at crucial locations at this study site, we suggest that vertical water-curtain holes should be installed in the pillar rather than increasing density of horizontal water-curtain boreholes. ? 2018 Elsevier Ltd
Number of references: 56
Main heading: Reliability analysis
Controlled terms: Boreholes - Caves - Hydraulic conductivity - Intelligent systems - Location - Monte Carlo methods - Numerical analysis - Numerical methods - Reliability - Underground gas storage
Uncontrolled terms: Deterministic simulation - Hydrologic containment - Petroleum gas - Real world situations - Rock cavern - Saturated hydraulic conductivity - Spatial variability - Underground storage
Classification code: 481.1 Geology
Geology
- 522 Gas Fuels
Gas Fuels
- 632.1 Hydraulics
Hydraulics
- 723.4 Artificial Intelligence
Artificial Intelligence
- 921.6 Numerical Methods
Numerical Methods
- 922.2 Mathematical Statistics
Mathematical Statistics
DOI: 10.1016/j.tust.2018.04.037
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
4. Crash-boxes based on elastic cement’s multi-stage radial flow and crushable cylindrical-corrugated components
Accession number: 20181905138069
Authors: Li, Zhuqiang (1); Liao, Changrong (1); Fu, Benyuan (1); Zhang, Peng (1); Jian, Xiaochun (2)
Author affiliation: (1) Key Laboratory for Optoelectronic Technology and Systems, Chongqing University, Chongqing; 400044, China; (2) Transportation Institute, Chongqing Jiaotong University, Chongqing; 400074, China
Corresponding author: Liao, Changrong
Source title: Zhendong yu Chongji/Journal of Vibration and Shock
Abbreviated source title: J Vib Shock
Volume: 37
Issue: 3
Issue date: February 15, 2018
Publication year: 2018
Pages: 14-21
Language: Chinese
ISSN: 10003835
Document type: Journal article (JA)
Publisher: Chinese Vibration Engineering Society
Abstract: A basic problem is energy absorption degradation of conventional automotive crash-boxes due to Euler instability. Here, a novel crash-box based on the combined action of elastic cement’s multi-stage radial flow and crushable cylindrical-corrugated components was proposed. Oswald-deWaele fluid constitutive model was employed to characterize the rheological properties of elastic cement, the model parameters were determined through tests. Through dropping-hammer impact tests, impact force transfer characteristics of crushable cylindrical-corrugated components were studied. The continuity equation and governing differential equation of elastic cement in multi-stage radial flow were established. With Oswald-deWaele model, the expressions for elastic cement’s radial velocity distribution at different radial positions and pressure gradient were deduced. The influence of inertia effect on pressure gradient was analyzed based on the average inertia method. Further, the calculation method of buffer force during elastic cement unsteadily flowing in the crash-box was obtained. In order to verify the rationality of the theoretical calculation, the crash-box prototype was designed, fabricated and assembled, and a dropping-hammer test system was constructed for impact tests under two different heights. The impact forces obtained with tests and those calculated with the theoretical method were compared, and the caused errors were analyzed. ? 2018, Editorial Office of Journal of Vibration and Shock. All right reserved.
Number of references: 24
Main heading: Cements
Controlled terms: Differential equations - Hammers - Pressure gradient - Radial flow
Uncontrolled terms: Automotive crashes - Continuity equations - Crash box - Governing differential equations - Inertia effects - Rheological property - Theoretical calculations - Theoretical methods
Classification code: 412.1 Cement
Cement
- 605.2 Small Tools, Unpowered
Small Tools, Unpowered
- 631.1 Fluid Flow, General
Fluid Flow, General
- 921.2 Calculus
Calculus
- 944.4 Pressure Measurements
Pressure Measurements
DOI: 10.13465/j.cnki.jvs.2018.03.003
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
5. Modeling and Analysis of a Nonlinear Age-Structured Model for Tumor Cell Populations with Quiescence
Accession number: 20181905171467
Authors: Liu, Zijian (1); Chen, Jing (2); Pang, Jianhua (3); Bi, Ping (4); Ruan, Shigui (2, 5)
Author affiliation: (1) College of Mathematics and Statistics, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Department of Mathematics, University of Miami, Coral Gables; FL; 33146, United States; (3) School of Science, Guangxi University of Science and Technology, Liuzhou; 545006, China; (4) Department of Mathematics, Shanghai Key Laboratory of PMMP, East China Normal University, Shanghai; 200241, China; (5) Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami; FL; 33136, United States
Corresponding author: Ruan, Shigui(ruan@math.miami.edu)
Source title: Journal of Nonlinear Science
Abbreviated source title: J. Nonlinear Sci.
Issue date: May 7, 2018
Publication year: 2018
Pages: 1-29
Language: English
ISSN: 09388974
E-ISSN: 14321467
CODEN: JNSCEK
Document type: Article in Press
Publisher: Springer New York LLC
Abstract: We present a nonlinear first-order hyperbolic partial differential equation model to describe age-structured tumor cell populations with proliferating and quiescent phases at the avascular stage in vitro. The division rate of the proliferating cells is assumed to be nonlinear due to the limitation of the nutrient and space. The model includes a proportion of newborn cells that enter directly the quiescent phase with age zero. This proportion can reflect the effect of treatment by drugs such as erlotinib. The existence and uniqueness of solutions are established. The local and global stabilities of the trivial steady state are investigated. The existence and local stability of the positive steady state are also analyzed. Numerical simulations are performed to verify the results and to examine the impacts of parameters on the nonlinear dynamics of the model. ? 2018 Springer Science+Business Media, LLC, part of Springer Nature
Main heading: Nonlinear equations
Controlled terms: Cell culture - Cell proliferation - Cells - Convergence of numerical methods - Tumors
Uncontrolled terms: Age structured model - Cell cycle - Existence and uniqueness of solution - Hyperbolic partial differential equation - Local and global stabilities - Positive steady state - Proliferating cells - Steady state
Classification code: 461.2 Biological Materials and Tissue Engineering
Biological Materials and Tissue Engineering
- 461.9 Biology
Biology
- 921.6 Numerical Methods
Numerical Methods
DOI: 10.1007/s00332-018-9463-0
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
6. Experiment and Numerical Analysis of Fatigue Cracks in Orthotropic Steel Bridge Deck
Accession number: 20181905145422
Authors: Qu, Yu (1, 2); Gu, An-Bang (1, 2); Zeng, Yong (1, 2); Du, Bai-Song (1, 2)
Author affiliation: (1) School of Civil Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Engineering Research Center of Mountain Bridge Structures and Materials of Ministry of Education, Chongqing; 400074, China
Source title: Bridge Construction
Abbreviated source title: Bridge Constr.
Volume: 47
Issue: 5
Issue date: October 28, 2017
Publication year: 2017
Pages: 65-70
Language: Chinese
ISSN: 10034722
Document type: Journal article (JA)
Publisher: Wuhan Bridge Research Institute
Abstract: The cutout in the diaphragm and the ends of the weld joint connecting the U rib and the diaphragm are the fatigue sensitive parts in the orthotropic steel bridge deck where the fatigue cracks are liable to occur untimely and excessively. To investigate the causes leading to the occurrence of the fatigue cracks, a steel box girder suspension bridge was cited as an example. With reference to the orthotropic steel deck of the bridge, the sectional model was prepared and the fatigue tests and extended finite element analysis were carried out. Considering the influences of the out-of-plane deformation of the diaphragm, the occurrence and development of the fatigue cracks at the parts of the cutout and the ends of the weld joint were studied. The results indicate that after the sectional model experiences the 2 million times fatigue cycle load, the 7.5 mm long crack appears at the cutout in the diaphragm of the model and after the 2.6 million times cycle load, the crack extends to 31 mm. When the relative horizontal displacement (1.21 mm) between the top plate and the diaphragm is considered, the calculation values of the in-plane stresses at the various measurement points are well accordant with the measured values in general. The stress at the minimum cutout section of the diaphragm reaches 60 MPa, the hot spot stress reaches or exceeds the 70 MPa of the constant fatigue limit of the structural details there and the crack eventually occurs. The out-of-plane deformation of the diaphragm is the root cause inducing the crack at the cutout in the diaphragm while the hot spot stress and structural defects impel the crack to occur. ? 2017, Journal Press, China Railway Bridge Science Research Institute, Ltd. All right reserved.
Number of references: 12
Main heading: Cracks
Controlled terms: Box girder bridges - Bridge decks - Deformation - Diaphragms - Fatigue crack propagation - Fatigue of materials - Fatigue testing - Finite element method - Steel bridges - Welds
Uncontrolled terms: Extended finite elements - Fatigue cracks - Orthotropic steel bridge decks - Sectional model - Weld joints
Classification code: 401.1 Bridges
Bridges
- 538.2 Welding
Welding
- 601.2 Machine Components
Machine Components
- 921.6 Numerical Methods
Numerical Methods
- 951 Materials Science
Materials Science
Funding Details: Number; Acronym; Sponsor: 51478071; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
7. Load-bearing Characters Analysis of Large Diameter Rock-Socketed Filling Piles Based on Self-Balanced Method
Accession number: 20181805136001
Authors: Tongqing, Wu (1, 2); Liang, Li (3); Xinjian, Liu (4); Xu, Nianchun (1, 2); Tian, Mao (3)
Author affiliation: (1) School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing; 401331, China; (2) Chongqing Key Laboratory of Energy Engineering Mechanics and Disaster Prevention and Mitigation, Chongqing; 401331, China; (3) National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing; 400074, China; (4) Chongqing Construction Science Research Institute, Chongqing; 400020, China
Corresponding author: Liang, Li(634986248@qq.com)
Source title: IOP Conference Series: Materials Science and Engineering
Abbreviated source title: IOP Conf. Ser. Mater. Sci. Eng.
Volume: 324
Part number: 1 of 1
Issue: 1
Issue title: 2017 the 5th International Conference on Mechanical Engineering, Materials Science and Civil Engineering
Issue date: April 6, 2018
Publication year: 2018
Article number: 012047
Language: English
ISSN: 17578981
E-ISSN: 1757899X
Document type: Conference article (CA)
Conference name: 2017 5th International Conference on Mechanical Engineering, Materials Science and Civil Engineering, ICMEMSCE 2017
Conference date: December 15, 2017 - December 16, 2017
Conference location: Kuala Lumpur, Malaysia
Conference code: 135937
Publisher: Institute of Physics Publishing
Abstract: Self-balanced method is carried out on the large diameter rock-socketed filling piles of high-pile wharf at Inland River, to explore the distribution laws of load-displacement curve, pile internal force, pile tip friction resistance and pile side friction resistance under load force. The results showed that: the tip resistance of S1 and S2 test piles accounted for 53.4% and 53.6% of the pile bearing capacity, respectively, while the total side friction resistance accounted for 46.6% and 46.4% of the pile bearing capacity, respectively; both the pile tip friction resistance and pile side friction resistance can be fully played, and reach to the design requirements. The reasonability of large diameter rock-socketed filling design is verified through test analysis, which can provide basis for the optimization of high-pile wharf structural type, thus reducing the wharf project cost, and also providing reference for the similar large diameter rock-socketed filling piles of high-pile wharf at Inland River. ? Published under licence by IOP Publishing Ltd.
Number of references: 10
Main heading: Piles
Controlled terms: Bearing capacity - Filling - Friction - Hydraulic structures - Pile foundations - Rocks - Tribology
Uncontrolled terms: Distribution law - Friction resistance - Load bearing character - Load-displacement curve - Pile internal forces - Pile side frictions - Self-balanced methods - Structural type
Classification code: 408.2 Structural Members and Shapes
Structural Members and Shapes
- 483.2 Foundations
Foundations
- 691.2 Materials Handling Methods
Materials Handling Methods
- 931 Classical Physics; Quantum Theory; Relativity
Classical Physics; Quantum Theory; Relativity
DOI: 10.1088/1757-899X/324/1/012047
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
8. The unity of three types of slope failure criteria
Accession number: 20181905174257
Authors: Tu, Yi-Liang (1, 2, 3); Liu, Xin-Rong (1, 3); Zhong, Zu-Liang (1, 3); Du, Li-Bing (1, 3); Wang, Peng (1, 3)
Author affiliation: (1) College of Civil Engineering, Chongqing University, Chongqing; 400045, China; (2) School of Civil Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (3) Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing; 400030, China
Source title: Yantu Lixue/Rock and Soil Mechanics
Abbreviated source title: Rock Soil Mech
Volume: 39
Issue: 1
Issue date: January 10, 2018
Publication year: 2018
Pages: 173-180 and 190
Language: Chinese
ISSN: 10007598
Document type: Journal article (JA)
Publisher: Academia Sinica
Abstract: The energy mechanism of material damage in thermodynamic theory was introduced to slope engineering. An energy conservation equation that was applicable in strength reduction period was deduced. Then, a calculation procedure for the slope energy was developed with FLAC3D, which was applied to a traditional slope example. Compared with the result from Spencer method, the slope’s energy change was closely related to its stability in the strength reduction method, hence four new slope failure criteria-energy catastrophe criteria which were theoretically in unity were proposed. By comparison, the criterion of the kinetic energy catastrophe is in correspondence with the criteria of numerical calculation non-convergence, the loss of gravitational potential energy catastrophe is in correspondence with the criteria of dramatic increase in the marked nodal displacements, and the dissipated energy catastrophe is in correspondence with the criteria of a plastic zone going through the slope. In summary, the aforementioned correspondences demonstrate the unity of the three common failure criteria. Several examples demonstrate that the different results from the three common failure criteria are because of artificial factors such as mesh generation precision and numerical convergence criteria. In essence, the different results stem from the fact that numerical calculation is a kind of approximate solution. In application, the accuracy of safety factor can be evaluated by the consistency of the results from various slope failure criteria. The better the consistency is, the higher the accuracy is. The basic method of improving the accuracy of safety factor is strict convergence standard and fine mesh precision, but achieving strict convergence standard and fine mesh precision may require extremely long numerical calculation time. Therefore, a moderate numerical calculation time should be chosen to maximize the computational efficiency. ? 2018, Science Press. All right reserved.
Number of references: 23
Main heading: Slope stability
Controlled terms: Computation theory - Computational efficiency - Convergence of numerical methods - Disasters - Energy dissipation - Finite element method - Kinetic energy - Kinetics - Mesh generation - Potential energy - Safety factor - Stability criteria
Uncontrolled terms: Energy - Failure criteria - Slope - Strength reduction finite element method - Unity
Classification code: 406.2 Roads and Streets
Roads and Streets
- 525.4 Energy Losses (industrial and residential)
Energy Losses (industrial and residential)
- 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
- 914.1 Accidents and Accident Prevention
Accidents and Accident Prevention
- 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
Combinatorial Mathematics, Includes Graph Theory, Set Theory
- 921.6 Numerical Methods
Numerical Methods
- 931 Classical Physics; Quantum Theory; Relativity
Classical Physics; Quantum Theory; Relativity
- 961 Systems Science
Systems Science
DOI: 10.16285/j.rsm.2016.0056
Funding Details: Number; Acronym; Sponsor: 41372356; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 51108485; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
9. Three-dimensional Stability Analysis of Complex Gentle Incline Rock Slope
Accession number: 20181905153066
Authors: Wang, Lin-Feng (1); Tang, Hong-Mei (1); Tang, Fen (1); Ye, Si-Qiao (1); Wu, Chuan-Sheng (1); Xia, Yu-Chao (1)
Author affiliation: (1) Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing; 400074, China
Source title: Zhongguo Gonglu Xuebao/China Journal of Highway and Transport
Abbreviated source title: Zongguo Gonglu Xuebao
Volume: 31
Issue: 2
Issue date: February 1, 2018
Publication year: 2018
Pages: 57-66
Language: Chinese
ISSN: 10017372
CODEN: ZGXUFN
Document type: Journal article (JA)
Publisher: Xi’an Highway University
Abstract: In order to establish the three-dimensional stability analysis method of complex gentle incline rock slope, the gentle incline rock slope which includes stratum and multi-group structural plane was taken as the research object. Firstly, according to the survey data of field, the contact relationship of adjacent rock blocks of gentle incline rock slope was divided into detachment, surface contact and line contact. According to the contact method of each rock, the corresponding contact mechanics mode was constructed, and the load-bearing condition of the rock was also defined. Based on the material mechanics, the calculation method of interlayer load in three kinds of contact cases was established by regarding vertical displacement and the corner of rock as intermediate variables. Then, according to the load of each rock, the tensile stress, shear stress and torque at the rear structural plane of rock were calculated. The first, second and third type of stress intensity factors of the structural plane were obtained based on the fracture mechanics method, and further, the calculated expressions of the combined stress intensity factors of the structural plane were obtained. Finally, the ratio of the fracture toughness of the structural plane to the joint stress intensity factors was used as the stability coefficient of each rock. By comparing the relationship of size between the stability factor of the rock and 1, whether the blocks are stable could be judged. The method of this paper was applied to gentle incline rock slope of Yangcha River in Qijiang. The results show that the location of the top-slope failure calculated by the calculation method in this paper is basically consistent with the location where the on-site slope has been cracked, which means that the three dimension stability analysis method of complex gentle incline rock slope is reasonable. Therefore, the method constructed in this paper can provide primary theoretical support for the prevention and control of the gentle incline rock slope. ? 2018, Editorial Department of China Journal of Highway and Transport. All right reserved.
Number of references: 17
Main heading: Rocks
Controlled terms: Deformation - Dimensional stability - Fracture mechanics - Fracture toughness - Shear stress - Slope stability - Stress intensity factors - Structural analysis
Uncontrolled terms: Fracture mechanics method - Prevention and controls - Road engineering - Rock mass - Stability analysis - Stability coefficient - Structural planes - Vertical displacements
Classification code: 406.2 Roads and Streets
Roads and Streets
- 408.1 Structural Design, General
Structural Design, General
- 931.1 Mechanics
Mechanics
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
10. Foot Manoeuvres and Workload of Driver on Mountainous Roads with Longitudinal Slopes
Accession number: 20181905153014
Authors: Xu, Jin (1, 2); Wang, Xu (2); Wang, Can (2); Shao, Yi-Ming (2); Ma, Zhao-You (3)
Author affiliation: (1) Chongqing Key Laboratory of Transportation Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) School of Traffic and Transportation, Chongqing Jiaotong University, Chongqing; 400074, China; (3) Key Laboratory of Ministry of Public Security for Road Traffic Safety, Wuxi; Jiangsu; 214151, China
Corresponding author: Ma, Zhao-You(uarain@126.com)
Source title: Zhongguo Gonglu Xuebao/China Journal of Highway and Transport
Abbreviated source title: Zongguo Gonglu Xuebao
Volume: 31
Issue: 1
Issue date: January 1, 2018
Publication year: 2018
Pages: 91-100
Language: Chinese
ISSN: 10017372
CODEN: ZGXUFN
Document type: Journal article (JA)
Publisher: Xi’an Highway University
Abstract: To validate the correlation between vertical alignment parameters of mountainous roads and physiological signals of the driver, and clarity the mechanism of parameters of the sloped section affecting driver’s workload, the vehicle driving test on three two-lane mountainous roads with longitudinal slopes were carried out. The geometric parameters of slopes, drivers’ electrocardiogram as well as accelerator and brake pedal force under naturalistic driving habits were collected. The distribution of pedal force was obtained, and the effect of grade change on pedal force was analyzed based on the measured data. Then the correlation between pedal force and heart rate increase (H) were confirmed respectively for uphill and downhill sections, and the regression model of H as a function of pedal force was established. The mechanism of driver’s workload on slopes was revealed from both physical and mental burden perspective. The results show that the mean and characteristics percentile of brake pedal force are higher than that of accelerator pedal force, and brake pedal force corresponding to the highest frequency of use is greater than the magnitude of the accelerator pedal force, which indicating greater physical load brought by pedal operation on downhill. Moreover, pedal force is positively correlated with H, and H is more relevant to the brake pedal force on downhill, indicating that the operation related to brake pedal on downhill, especially the steep downhill, is more prone to producing mental burden. Furthermore, when the pedal force exceeds a certain magnitude, some driver’s H value becomes sensitive to the increase in pedal force. Last but not the least, after averaging the pedal force and H data of every subjects on each slope (eliminating individual differences of different drivers), the mean of H is more relevant to the mean of pedal force. ? 2018, Editorial Department of China Journal of Highway and Transport. All right reserved.
Number of references: 19
Main heading: Acceleration control
Controlled terms: Automobile drivers - Brakes - Heart - Highway engineering - Physiological models - Regression analysis
Uncontrolled terms: Driver workload - Driving test - Foot manoeuvre - Heart rates - Mountainous highway - Mountainous road with longitudinal slope - Pedal forces - Traffic Engineering
Classification code: 432 Highway Transportation
Highway Transportation
- 461.2 Biological Materials and Tissue Engineering
Biological Materials and Tissue Engineering
- 602 Mechanical Drives and Transmissions
Mechanical Drives and Transmissions
- 731.3 Specific Variables Control
Specific Variables Control
- 922.2 Mathematical Statistics
Mathematical Statistics
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
11. Construction Control of Hoisting and Installation of Arch Rib of a Half-Through CFST Stiff Skeleton Arch Bridge
Accession number: 20181905145429
Authors: Yao, Guo-Wen (1, 2); Chao, Yang (1, 2); Wu, Hai-Jun (1, 2); Qu, Hao-Ran (1, 2)
Author affiliation: (1) State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) School of Civil Engineering, Chongqing Jiaotong University, Chongqing; 400074, China
Source title: Bridge Construction
Abbreviated source title: Bridge Constr.
Volume: 47
Issue: 5
Issue date: October 28, 2017
Publication year: 2017
Pages: 107-111
Language: Chinese
ISSN: 10034722
Document type: Journal article (JA)
Publisher: Wuhan Bridge Research Institute
Abstract: The main bridge of the Guansheng Qujiang River Bridge in Guang’an is a half-through concrete-filled steel tube (CFST) stiff skeleton arch bridge with the main span of 320 m. The stiff skeleton of the bridge was constructed, using the fastening stay method and in the construction, the fastening stays were tensioned in place in one time. In view of the limitations of the 2 calculation methods of the forward analysis and reverse analysis for the stay forces and to accurately calculate the stay forces and the pre-raising amounts of the arch rib segments in the installation and make the completed arch geometric shape approximate the theoretic geometric shape, the adjustment method of the optimal stay forces based on the control target of the completed arch geometric shape was proposed. The MIDAS Civil 2015 was used to set up the finite element model for the whole bridge at the hoisting and installation stages of the arch rib segments, the influences of the tangent displacement on the follow-up construction stages were considered and by controlling the geometric shape mainly and the stay forces subsidiarily, the geometric shape, fastening stay forces, backstay forces and the chord stresses of the bridge were analyzed and the analysis was compared to the measured values. The results show that the measured values of the geometric shape, fastening stay forces, backstay forces and the chord stresses are highly accordant with the theoretic values, the geometric shape and structural stresses of the main arch can satisfy the relevant requirements in the design and codes, proving that the adjustment method as mentioned is feasible and effective. ? 2017, Journal Press, China Railway Bridge Science Research Institute, Ltd. All right reserved.
Number of references: 12
Main heading: Finite element method
Controlled terms: Arch bridges - Arches - Concretes - Cranes - Geometry - Musculoskeletal system - Tubular steel structures
Uncontrolled terms: Concrete filled steel tube - Construction control - Fastening stay method - Geometric shape - Stay force - Stiff skeleton
Classification code: 401.1 Bridges
Bridges
- 408.2 Structural Members and Shapes
Structural Members and Shapes
- 412 Concrete
Concrete
- 461.3 Biomechanics, Bionics and Biomimetics
Biomechanics, Bionics and Biomimetics
- 693.1 Cranes
Cranes
- 921 Mathematics
Mathematics
- 921.6 Numerical Methods
Numerical Methods
Funding Details: Number; Acronym; Sponsor: 51478071; NSFC; National Natural Science Foundation of China
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
12. The simulation of the warpage rule of the thin-walled part of polypropylene composite based on the coupling effect of mold deformation and injection molding process
Accession number: 20181905175688
Authors: Zhang, Jixiang (1); Yin, Xiaoyi (1); Liu, Fengzhi (1); Yang, Pan (1)
Author affiliation: (1) College of Mechatronics and Automobile Engineering, Chongqing Jiaotong University, Chongqing; 400074, China
Corresponding author: Yin, Xiaoyi(1164804892@qq.com)
Source title: IEEE Journal of Selected Topics in Quantum Electronics
Abbreviated source title: IEEE J Sel Top Quantum Electron
Volume: 25
Issue: 3
Issue date: April 25, 2018
Publication year: 2018
Pages: 593-601
Language: English
ISSN: 07921233
E-ISSN: 21910359
CODEN: IJSQEN
Document type: Journal article (JA)
Publisher: Institute of Electrical and Electronics Engineers Inc.
Abstract: Aiming at the problem that a thin-walled plastic part easily produces warpage, an orthogonal experimental method was used for multiparameter coupling analysis, with mold structure parameters and injection molding process parameters considered synthetically. The plastic part deformation under different experiment schemes was comparatively studied, and the key factors affecting the plastic part warpage were analyzed. Then the injection molding process was optimized. The results showed that the important order of the influence factors for the plastic part warpage was packing pressure, packing time, cooling plan, mold temperature, and melt temperature. Among them, packing pressure was the most significant factor. The optimal injection molding process schemes reducing the plastic part warpage were melt temperature (260°C), mold temperature (60°C), packing pressure (150 MPa), packing time (2 s), and cooling plan 3. In this situation, the forming plate flatness was better. ? 2018 Walter de Gruyter GmbH, Berlin/Boston.
Number of references: 25
Main heading: Injection molding
Controlled terms: Deformation - Molds - Optimization - Plastic parts - Polypropylenes - Thin walled structures
Uncontrolled terms: Coupling analysis - Experimental methods - Injection molding process - Optimal injection - Polypropylene composite - Thin-walled - Thin-walled parts - Warpages
Classification code: 815.1.1 Organic Polymers
Organic Polymers
- 817.1 Polymer Products
Polymer Products
- 921.5 Optimization Techniques
Optimization Techniques
DOI: 10.1515/secm-2015-0195
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
13. Stability attenuation of retaining wall under flood in river bend
Accession number: 20181905174244
Authors: Zhang, Rui-Gang (1, 2); Xu, Guang-Xiang (1); Wang, Lin-Feng (3); Kang, Hai (4); Su, Li-Mei (5); Liu, Li (1)
Author affiliation: (1) Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Water Authority of Wansheng Economic and Technological Development Zone, Chongqing; 400800, China; (3) Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (4) China Gezhouba Group Corporation International Ltd., Beijing; 100025, China; (5) Transport Bureau of Wansheng Economic and Technological Development Zone, Chongqing; 400800, China
Source title: Yantu Lixue/Rock and Soil Mechanics
Abbreviated source title: Rock Soil Mech
Volume: 39
Issue: 1
Issue date: January 10, 2018
Publication year: 2018
Pages: 63-70 and 77
Language: Chinese
ISSN: 10007598
Document type: Journal article (JA)
Publisher: Academia Sinica
Abstract: Natural rivers are curved. Bend circulation contributes to turbulence and causes erosion in concave bank, resulting in frequent flood damage on retaining wall along the river-side road. To investigate the trend of water movement at the river bend, force of retaining wall was analyzed in the condition of the flood. Based on the mechanical model of stability analysis of retaining wall, the calculating formula of the bend river retaining wall stability coefficient was deduced and calculation equation of limit punching depth under the wall was given. Shock calculation of rationality was verified in the gentle bend flood conditions and the stability of wall attenuation factors was analyzed by a numerical example. The results show that the impact load on the wall increases and the stability of wall is improved in the period of flood level rising and no erosion occurrence. However, the stability of retaining wall decreases when erosion occurs, and wall bottom scour may lead to overturning. The stability of wall decreases with the increase of water level difference between the front and back of the retaining wall, and the anti-sliding stability coefficient of the wall attenuates faster than that of the anti-overturning stability coefficient. The instability possibility of the wall is relatively high in the period of flood steeping. The calculation method and results of retaining stability coefficient are consistent with the site conditions, providing a theoretical reference for similar design and research of retaining walls along rivers. ? 2018, Science Press. All right reserved.
Number of references: 21
Main heading: Stability
Controlled terms: Erosion - Floods - Fluid mechanics - Retaining walls - Rivers - Shore protection - Water levels
Uncontrolled terms: Anti-sliding stabilities - Concave bank - Hydraulic engineering - Scour depth - Stability analysis - Stability attenuations - Stability coefficient - Wall attenuation
Classification code: 407.1 Maritime Structures
Maritime Structures
- 931.1 Mechanics
Mechanics
DOI: 10.16285/j.rsm.2016.0135
Funding Details: Number; Acronym; Sponsor: 51408084; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: cstc2014jcyjA30019; CSTC; Chongqing Science and Technology Commission
Compendex references: YES
Database: Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.
Data Provider: Engineering Village
