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Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 299-304 doi: 10.1007/s11709-009-0035-0

Abstract: The similarity law of centrifuge test was developed for the seepage field and stress field of a foundationFinally, a comparative study was conducted on the test results of the pit deformation and the field measurementresults show that the pit deformation regularity of the test is basically identical with that of the fieldmeasurement, and the difference in pit deformation between the test and the field measurement is within

Keywords： foundation pit with confined water     centrifuge model test     seepage-stress coupling field     similarity relation     field measurement     deformation    

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Surficial stability analysis of soil slope under seepage based on a novel failure mode

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 712-726 doi: 10.1007/s11709-021-0729-5

Abstract: In this study, the limit stress state and discrimination equation of an infinite slope under saturatedseepage flow were analyzed based on the Mohr-Coulomb strength criterion.semi-analytical framework considering the edge effect for the surficial stability of a soil slope under downslope seepagemethods, and can be efficiently used to assess the surficial stability of soil slopes under rainwater seepage

Keywords： soil slope     seepage     surficial failure mode     stress state     edge effects    

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Influence of advanced engineering measures on displacement and stress field of surrounding rock in tunnels

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0966-x

Abstract: Furthermore, anchor cable and grouting modifications changed the stress field of the rock mass in theThe tensile stress field of the rock mass in the modified anchor cable area was converted into a compressivestress field.The stress field in the modified grouting area changed from shear stress in the fault slip directionto tensile stress in the axial tunnel direction.

Keywords： anti-fault effect     engineering measures     LRAF method     stress and displacement field     tunnel-crossing    

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Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 158-164 doi: 10.1007/s11709-009-0002-9

Abstract: A field test was conducted to investigate the distribution of temperature field and the variation ofthermal stress for a prestressed concrete (PC) box-girder bridge.According to field tests, the thermal stress incurred by hydration heat may induce temperature cracksFurthermore, the nonlinear distribution of temperature gradient and the fluctuation of thermal stress

Keywords： box-girder bridge     field test     hydration heat     temperature field     temperature gradient     thermal stress    

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Numerical analysis of vehicle-bridge coupling vibration concerning nonlinear stress-dependent damping

Pengfei LI; Jinquan ZHANG; Shengqi MEI; Zhenhua DONG; Yan MAO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 239-249 doi: 10.1007/s11709-021-0804-y

Abstract: This study investigated the application of stress-dependent damping associated with vehicle-bridge couplingvibration and based on that investigation proposed the stress-dependent damping ratio.The results of the investigation show that the stress-dependent damping ratio is significantly differentThe peak accelerations using the regular damping ratio are 18.9%, 21.3%, and 14.5% of the stress-dependentThe acceleration response of the bridge which was calculated using the stress-dependent damping ratio

Keywords： vehicle-bridge vibration system     dynamic analysis     stress-dependent damping     energy dissipation    

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Studying the stress-suction coupling in soils using an oedometer equipped with a high capacity tensiometer

Trung Tinh LE, Yu-Jun CUI, Juan Jorge MU?OZ, Pierre DELAGE, Anh Minh TANG, Xiang-Ling LI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 160-170 doi: 10.1007/s11709-011-0106-x

Abstract: During oedometer compression, the changes in suction with increased vertical stress are monitored byBelow this point, the ratio between the vertical stress and the change in suction are determined.The suction/stress behavior during unloading is also described and discussed.better understand hydromechanical couplings in natural soils in relation with suction increase during stress

Keywords： Oedometer     tensiometer     swelling     physicochemical and mechanical effects     stress/suction coupling     soil plasticity    

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Analysis of the dynamic stress of planar flexible-links parallel robots

DU Zhaocai, YU Yueqing, YANG Jianxin

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 152-158 doi: 10.1007/s11465-007-0025-7

Abstract: This paper presents a method for the dynamic stress analysis of planar parallel robots with flexibleelastic deformations and elastic displacements of the flexible links is investigated, considering the couplingConsidering the effects of bending-shearing strain and tensile-compression strain, the dynamic stressThe dynamic stress analysis is demonstrated to have a significant impact on the analysis, design and

Keywords： numerical simulation     Due     coupling     software SAMCEF     flexibility    

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Stress field near circular-arc interface crack tip based on electric saturation concept

Longchao DAI, Xinwei WANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 320-325 doi: 10.1007/s11465-009-0042-9

Abstract: between a circular piezoelectric inhomogeneity and an infinite piezoelectric matrix subjected to a far-fieldExplicit closed form expressions for the complex potentials in both the matrix and the inclusion, and the stress

Keywords： piezoelectric material     arc crack     strip saturation     stress intensity factor    

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Magnetostriction varieties and stress relief caused by pulsed magnetic field

Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 354-358 doi: 10.1007/s11465-011-0123-4

Abstract:

Magnetostriction is investigated to evaluate the stress relief caused by pulsed magnetic field treatment, because this physical property is closely associated with residual stress.The stress variations caused by pulsed magnetic treatment are also compared.It is found that magnetostriction variations are closely associated with stress changes.is nearly a constant during magnetic field treatment, which is valuable for stress relief evaluation

Keywords： magnetostriction     pulsed magnetic field treatment     stress relief    

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Effect of heat transfer coefficient of steam turbine rotor on thermal stress field under off-design condition

Jie GUO,Danmei XIE,Hengliang ZHANG,Wei JIANG,Yan ZHOU

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 57-64 doi: 10.1007/s11708-015-0385-3

Abstract: The precise calculation of temperature and thermal stress field of steam turbine rotor under off-designapplied with ordinary rotor materials, has been conducted to investigate the temperature and thermal stresscalculation when steam parameters are low has a greater influence on that of rotor temperature and thermal stresscoefficient is larger than 10 W/(m ·°C), there will be barely any influence on the calculation of thermal stressThis research plays a constructive role in the calculation and analysis of thermal stress.

Keywords： steam turbine     rotor     thermal stress     heat transfer coefficient     empirical formula    

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Foundations bearing capacity subjected to seepage by the kinematic approach of the limit analysis

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 446-455 doi: 10.1007/s11709-013-0227-5

Abstract: An estimate of the ultimate load on foundations on soil layers subject to groundwater flow has been presented. The kinematic approach of the limit analysis was employed to find the upper-bound limit of the bearing capacity. Both smooth and rough base strip foundations were considered associated with different collapse patterns. Presence of the groundwater flow leads to a non-symmetric collapse pattern, i.e., a weak side and a strong side in two-sided collapse patterns, depending on the direction of the flow. It was found that the bearing capacity has a decreasing trend with increase in the groundwater flow gradient and hence, a reduction factor has been introduced to the third term in the bearing capacity equation as a function of the flow gradient.

Keywords： foundation     bearing capacity     limit analysis     numerical computation     plasticity     seepage    

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A New Method for Inferencing and Representing a Workpiece Residual Stress Field Using Monitored Deformation

Zhiwei Zhao,Changqing Liu,Yingguang Li,James Gao

Engineering 2023, Volume 22, Issue 3,   Pages 49-59 doi: 10.1016/j.eng.2022.07.018

Abstract: Existing technologies for measuring the residual stress field are either strain-based measurement methodsThis paper reports a new non-destructive method for inferencing the residual stress field based on deformationIn the proposed method, the residual stress field of a workpiece is inferred based on the characteristicsof the deformation forces that reflect the overall effect of the unbalanced residual stress field afterThe relationship between deformation forces and the residual stress field is modeled based on the principle

Keywords： Residual stress field     Precision manufacturing     Deformation force     Inverse problem     In situ     measurement    

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Analysis of resonant coupling coil configurations of EV wireless charging system: a simulation study

M. LU, A. JUNUSSOV, M. BAGHERI

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 152-165 doi: 10.1007/s11708-019-0615-1

Abstract: Nowadays, internal combustion engine vehicles are considered as one of the major contributors to air pollution. To make transportation more environmentally friendly, plug-in electric vehicles (PEVs) have been proposed. However, with an increase in the number of PEVs, the drawbacks associated with the cost and size, as well as charging cables of batteries have arisen. To address these challenges, a novel technology named wireless charging system has been recently recommended. This technology rapidly evolves and becomes very attractive for charging operations of electric vehicles. Currently, wireless charging systems offer highly efficient power transfer over the distances ranging from several millimeters to several hundred millimeters. This paper is focused on analyzing electromagnetically coupled resonant wireless technique used for the charging of EVs. The resonant wireless charging system for EVs is modeled, simulated, and then examined by changing different key parameters to evaluate how transfer distance, load, and coil’s geometry, precisely number of coil’s turns, coil’s shape, and inter-turn distance, influence the efficiency of the charging process. The simulation results are analyzed and critical dimensions are discussed. It is revealed that a proper choice of the dimensions, inter-turn distance, and transfer distance of the coil can result in a significant improvement in charging efficiency. Furthermore, the influence of the transfer distance, frequency, load, as well as the number of the turns of the coil on the performance of wireless charging system is the main focus of this paper.

Keywords： electromagnetically coupled resonator     near-field power transfer     wireless power transfer (WPT)    

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A time−space porosity computational model for concrete under sulfate attack

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0985-7

Abstract: In addition, the expansion strain at the macro-scale is obtained using a stress analysis model of compositeconcentric sphere elements and the micromechanical mean-field approach.

Keywords： expansion deformation     porosity     internal expansion stress     external sulfate attack     mechanical–chemicalcoupling model    

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Quantification of seepage in a multi-layered disconnected river-aquifer system

Jiang LI, Haizhu HU, Xiaomin MAO, Yi LIU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 237-245 doi: 10.15302/J-FASE-2017135

Abstract: Quantification of seepage in disconnected river-aquifer systems is significant for local water managementMFSL can calculate the stable seepage rate by assessing the dominant low permeability layers (includingWe used MFSL to calculate local seepage rate, and used GIS to extend the results to a regional scale.Results showed that low permeability liners could greatly reduce the seepage rate.However, if an unlined inundation area exists, the seepage rate may increase greatly.

Keywords： infiltration     low permeability liner     multi-layered porous media     river-aquifer seepage    

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Title Author Date Type Operation

Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Journal Article

Surficial stability analysis of soil slope under seepage based on a novel failure mode

Journal Article

Influence of advanced engineering measures on displacement and stress field of surrounding rock in tunnels

Journal Article

Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Journal Article

Numerical analysis of vehicle-bridge coupling vibration concerning nonlinear stress-dependent damping

Pengfei LI; Jinquan ZHANG; Shengqi MEI; Zhenhua DONG; Yan MAO

Journal Article

Studying the stress-suction coupling in soils using an oedometer equipped with a high capacity tensiometer

Trung Tinh LE, Yu-Jun CUI, Juan Jorge MU?OZ, Pierre DELAGE, Anh Minh TANG, Xiang-Ling LI

Journal Article

Analysis of the dynamic stress of planar flexible-links parallel robots

DU Zhaocai, YU Yueqing, YANG Jianxin

Journal Article

Stress field near circular-arc interface crack tip based on electric saturation concept

Longchao DAI, Xinwei WANG

Journal Article

Magnetostriction varieties and stress relief caused by pulsed magnetic field

Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO

Journal Article

Effect of heat transfer coefficient of steam turbine rotor on thermal stress field under off-design condition

Jie GUO,Danmei XIE,Hengliang ZHANG,Wei JIANG,Yan ZHOU

Journal Article

Foundations bearing capacity subjected to seepage by the kinematic approach of the limit analysis

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Journal Article

A New Method for Inferencing and Representing a Workpiece Residual Stress Field Using Monitored Deformation

Zhiwei Zhao,Changqing Liu,Yingguang Li,James Gao

Journal Article

Analysis of resonant coupling coil configurations of EV wireless charging system: a simulation study

M. LU, A. JUNUSSOV, M. BAGHERI

Journal Article

A time−space porosity computational model for concrete under sulfate attack

Journal Article

Quantification of seepage in a multi-layered disconnected river-aquifer system

Jiang LI, Haizhu HU, Xiaomin MAO, Yi LIU

Journal Article