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Development of Finite Element Limit Analysis Method and Its Applications in Geotechnical Engineering

Zheng Yingren,Zhao Shangyi,Deng Chujian,Liu Weiming,Tang Xiaosong,Zhang Liming

Strategic Study of CAE 2006, Volume 8, Issue 12,   Pages 39-61

Abstract:

Finite element limit analysis method has the advantage of combining numerical analysis method withtraditional limit equilibrium methods.It is particularly applicable to the analysis and design of geotechnical engineering.In the early 20th century, finite element limit analysis method has been developed vigorously in domesticThis method has also been used for searching sliding surface of complex landslide, retaining structure

Keywords： limit analysis method     finite element method     geotechnical engineering     slope     foundations     tunnel    

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3D fracture modelling and limit state analysis of prestressed composite concrete pipes

Pengfei HE, Yang SHEN, Yun GU, Pangyong SHEN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 165-175 doi: 10.1007/s11709-018-0484-4

Abstract: This allows the method to capture important phenomena compared to a pure shell model of concrete.chosen when concrete is subjected to compressive loading while a combined continuous-discrete fracture method

Keywords： cylindrical concrete structures     limit state analysis     3D fracture modelling     prestressed composite pipes    

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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: The kinematic approach of the limit analysis was employed to find the upper-bound limit of the bearing

Keywords： foundation     bearing capacity     limit analysis     numerical computation     plasticity     seepage    

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Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 378-387 doi: 10.1007/s11709-022-0808-2

Abstract: This study presents stability analyses of layered soil slopes in unsaturated conditions and uses a limitequilibrium method to determine the factor of safety involving suction stress of unsaturated soil.An example of a two-layered slope in clay and silt is selected to verify the used method by comparing

Keywords： slope stability     suction stress     unsaturated soil     layered slope     limit equilibrium    

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Adaptive selective ES-FEM limit analysis of cracked plane-strain structures

H. NGUYEN-XUAN,T. RABCZUK

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 478-490 doi: 10.1007/s11709-015-0317-7

Abstract: This paper presents a simple and efficient approach for predicting the plastic limit loads in crackedWe use two levels of mesh repartitioning for the finite element limit analysis.The limit analysis problem is recast into the compact form of a second-order cone programming (SOCP)The present method retains a low number of optimization variables.Several benchmark examples are given to show the simplicity and effectiveness of the present method.

Keywords： cracked structure     limit analysis     von Mises criterion     edge-based strain smoothing     second-order cone programming    

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New pseudo-dynamic analysis of two-layered cohesive-friction soil slope and its numerical validation

Suman HAZARI, Sima GHOSH, Richi Prasad SHARMA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1492-1508 doi: 10.1007/s11709-020-0679-3

Abstract: In this study, the limit equilibrium modified pseudo-dynamic method is used to analyze the stabilityNew formulations derived from an analytical method are proposed for the predicting the seismic responseThe results of the present method were compared with those in the available literature.The present analytical analysis was also verified against the finite element analysis results.

Keywords： layered soil     limit equilibrium method     seismic analysis     damping     PLAXIS    

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Slope stability analysis based on big data and convolutional neural network

Yangpan FU; Mansheng LIN; You ZHANG; Gongfa CHEN; Yongjian LIU

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 882-895 doi: 10.1007/s11709-022-0859-4

Abstract: The Limit Equilibrium Method (LEM) is commonly used in traditional slope stability analyses, but it isA CNN model can process data quickly and complete a large amount of data analysis in a specific situationThis study proposes a slope database generation method based on the LEM.The results show that the slope stability prediction method based on the CNN does not need complex calculationMoreover, the prediction accuracy of the CNN trained by the sample database for slope stability analysis

Keywords： slope stability     limit equilibrium method     convolutional neural network     database for slopes     big data    

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Stability and deformation analysis of high slope for tank type of bunker at Donglutian coal mine

Jiang Haibo,Gong Shoucai,Liu Qingxue

Strategic Study of CAE 2012, Volume 14, Issue 2,   Pages 107-112

Abstract: In this paper, the stability calculation and deformation analysis of excavation slope under differentconditions are made, using the limit equilibrium method and the finite element method.Reinforcement was applied in the slope, by method of composite soil nail wall and bored piles+entry cupporting

Keywords： tank type of bunker     slope     limit equilibrium method     finite element method (FEM)     stability     deformation    

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capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound finite element limitanalysis

Mantu MAJUMDER, Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 537-551 doi: 10.1007/s11709-021-0708-x

Abstract: piles in soft clay underlaid by stiff clay is numerically studied using the lower-bound finite element limitanalysis (LB FELA).

Keywords： bearing capacity     uplift capacity     under-reamed pile     clay     limit analysis    

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Modeling limit force capacities of high force to volume lead extrusion dampers

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 609-622 doi: 10.1007/s11709-021-0724-x

Abstract: Lead extrusion dampers are supplemental energy-dissipation devices that are used to mitigate seismic structural damage. Small volumetric sizes and high force capacities define high-force-to-volume (HF2V) devices, which can absorb significant response energy without sacrificial damage. However, the design of such devices for specific force capacities has proven difficult based on the complexities of their internal reaction mechanisms, leading to the adoption of empirical approaches. This study developed upper- and lower-bound force capacity estimates from analytical mechanics based on direct and indirect metal extrusion for guiding design. The derived equations are strictly functions of HF2V device geometric parameters, lead material properties, and extrusion mechanics. The upper-bound estimates from direct and indirect extrusion are denoted as (FUB,1, FUB,2) and (FUB,3, FUB,4), respectively, and the lower-bound estimates are denoted as (FLB, FLB,1) based on the combination of extrusion and friction forces. The proposed models were validated by comparing the predicted bounds to experimental force capacity data from 15 experimental HF2V device tests. The experimental device forces all lie above the lower-bound estimates (FLB, FLB,1) and below the upper-bound estimates (FUB,1, FUB,2, FUB,4). Overall, the (FLB, FUB,2) pair provides wider bounds and the (FLB,1, FUB,4/FUB,1) pair provides narrower bounds. The (FLB,1, FUB,1) pair has a mean lower-bound gap of 36%, meaning the lower bound was 74% of the actual device force on average. The mean upper-bound gap was 33%. The bulge area and cylinder diameter of HF2V devices are key parameters affecting device forces. These relatively tight bounds provide useful mechanics-based predictive design guides for ensuring that device forces are within the targeted design range after manufacturing.

Keywords： extrusion     lead dampers     upper and lower bound     analytical modelling     limit force    

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Setting up a heart rate alarm limit to decrease oculocardiac reflex during strabismus surgery in children

ZHANG Kangkang, GU Enhua, LU Junjie

Frontiers of Medicine 2008, Volume 2, Issue 3,   Pages 295-297 doi: 10.1007/s11684-008-0056-4

Abstract: The aim of this paper is to investigate a method which may decrease the incidence and severity of oculocardiacThis method significantly decreased the incidence and severity of OCR during strabismus surgery in children
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Undrained seismic bearing capacity of strip footing adjacent to a heterogeneous excavation

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 566-583 doi: 10.1007/s11709-023-0905-x

Abstract: The analysis of the bearing capacity of strip footings sited near an excavation is critical in geotechnicsfooting resting on an excavation were evaluated using the lower and upper bounds of the finite element limitanalysis method.

Keywords： excavation     finite element limit analysis     heterogeneous soil     strip footing     undrained bearing capacity    

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Presetting Method for Embodied Carbon Emission Limit of Building Structures

Xiao Jianzhuang, Xia Bing,Xiao Xuwen,Hu Xiaolong,Ding Tao,Zhou Ying,Zhu Hehua

Strategic Study of CAE 2023, Volume 25, Issue 2,   Pages 187-197 doi: 10.15302/J-SSCAE-2023.02.016

Abstract:

The embodied carbon emission limit is a key parameter for quantitativelynewly built and existing buildings in building structure retention and demand, which provides limitFurthermore, suggestions for research related to carbon emission limit are provided from the aspects

Keywords： building structures     embodied carbon emission limit     carbon emission reduction target decomposition    

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A toughness based deformation limit for X- and K-joints under brace axial tension

Bo GU,Xudong QIAN,Aziz AHMED

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 345-362 doi: 10.1007/s11709-016-0333-2

Abstract: This study reports a deformation limit for the initiation of ductile fracture failure in fatigue-crackedThe proposed approach sets the deformation limit as the numerically computed crack driving force in aThe development of the deformation limit includes a normalization procedure, which covers a wide rangedemonstrates the conservative nature of the proposed deformation limit.The proposed deformation limit, when extrapolated to a zero crack depth, provides an estimate on the

Keywords： circular hollow section (CHS)     tubular joint     fracture failure     deformation limit     J-integral    

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Modified Bishop method for stability analysis of weakly sloped subgrade under centrifuge model test

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 727-741 doi: 10.1007/s11709-021-0730-z

Abstract: In this study, a novel modified Bishop method was developed to improve the accuracy of the stabilityThe instability mechanism of the weakly sloped subgrade was considered in the proposed method using thesimulations and experimental tests were conducted to evaluate the advantages of the proposed modified Bishop methodCompared with the traditional slice method, the error between the proposed method and the exact value

Keywords： weakly sloped subgrade     stability analysis     additional force     influential force     modified Bishop method    

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Title Author Date Type Operation

Development of Finite Element Limit Analysis Method and Its Applications in Geotechnical Engineering

Zheng Yingren,Zhao Shangyi,Deng Chujian,Liu Weiming,Tang Xiaosong,Zhang Liming

Journal Article

3D fracture modelling and limit state analysis of prestressed composite concrete pipes

Pengfei HE, Yang SHEN, Yun GU, Pangyong SHEN

Journal Article

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

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Journal Article

Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Journal Article

Adaptive selective ES-FEM limit analysis of cracked plane-strain structures

H. NGUYEN-XUAN,T. RABCZUK

Journal Article

New pseudo-dynamic analysis of two-layered cohesive-friction soil slope and its numerical validation

Suman HAZARI, Sima GHOSH, Richi Prasad SHARMA

Journal Article

Slope stability analysis based on big data and convolutional neural network

Yangpan FU; Mansheng LIN; You ZHANG; Gongfa CHEN; Yongjian LIU

Journal Article

Stability and deformation analysis of high slope for tank type of bunker at Donglutian coal mine

Jiang Haibo,Gong Shoucai,Liu Qingxue

Journal Article

capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound finite element limitanalysis

Mantu MAJUMDER, Debarghya CHAKRABORTY

Journal Article

Modeling limit force capacities of high force to volume lead extrusion dampers

Journal Article

Setting up a heart rate alarm limit to decrease oculocardiac reflex during strabismus surgery in children

ZHANG Kangkang, GU Enhua, LU Junjie

Journal Article

Undrained seismic bearing capacity of strip footing adjacent to a heterogeneous excavation

Journal Article

Presetting Method for Embodied Carbon Emission Limit of Building Structures

Xiao Jianzhuang, Xia Bing,Xiao Xuwen,Hu Xiaolong,Ding Tao,Zhou Ying,Zhu Hehua

Journal Article

A toughness based deformation limit for X- and K-joints under brace axial tension

Bo GU,Xudong QIAN,Aziz AHMED

Journal Article

Modified Bishop method for stability analysis of weakly sloped subgrade under centrifuge model test

Journal Article