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Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 306-325 doi: 10.1007/s11709-022-0890-5

Abstract: This paper numerically studied the effect of uncertainty and random distribution of concrete strength in beams failing in shear and flexure using lattice modeling, which is suitable for statistical analysis. The independent variables of this study included the level of strength reduction and the number of members with reduced strength. Three levels of material deficiency (i.e., 10%, 20%, 30%) were randomly introduced to 5%, 10%, 15%, and 20% of members. To provide a database and reliable results, 1000 analyses were carried out (a total of 24000 analyses) using the MATLAB software for each combination. Comparative studies were conducted for both shear- and flexure-deficit beams under four-point loading and results were compared using finite element software where relevant. Capability of lattice modeling was highlighted as an efficient tool to account for uncertainty in statistical studies. Results showed that the number of deficient members had a more significant effect on beam capacity compared to the level of strength deficiency. The scatter of random load-capacities was higher in flexure (range: 0.680–0.990) than that of shear (range: 0.795–0.996). Finally, nonlinear regression relationships were established with coefficient of correlation values (R2) above 0.90, which captured the overall load–deflection response and level of load reduction.

Keywords： lattice modeling     shear failure     flexural failure     uncertainty     deficiency     numerical simulation    

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A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Frontiers of Structural and Civil Engineering   Pages 1021-1032 doi: 10.1007/s11709-023-0952-3

Abstract: Previous research has shown that bending failure, particularly during rapid filling on soft ground, isthe critical failure mode for pile-supported embankments.soil deformation mechanism and Poulos’ solution for pile–soil interaction to investigate the bending behaviorThe location of the bending failure depends on the position and relative stiffness of the given pile.Furthermore, the effect of embedding a pile into a firm ground layer on the bending behavior was investigated

Keywords： bending behavior     pile     embankment     soil−structure interaction     failure mode    

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Measurement of dynamic fracture toughness and failure behavior for explosive mock materials

Pengwan CHEN, Zhongbin ZHOU, Shaopeng MA, Qinwei MA, Fenglei HUANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 292-295 doi: 10.1007/s11465-011-0237-8

Abstract: that the method of combined DIC and SHPB is effective to study the dynamic deformation and fracture behavior

Keywords： digital image correlation     polymer bonded explosive simulant     split Hopkinson pressure bar (SHPB)     semicircular bending test     deformation     fracture toughness    

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Effect of TGO on the tensile failure behavior of thermal barrier coatings

Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4,   Pages 452-460 doi: 10.1007/s11465-019-0541-2

Abstract: produced by TGO under tensile load delayed the generation of surface cracks and thus prolonged the failure

Keywords： thermally grown oxides     thermal barrier coatings     acoustic emission technology     digital image correlation     pores    

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Application of the expanded distinct element method for the study of crack growth in rock-like materials under uniaxial compression

Lei YANG, Yujing JIANG, Bo LI, Shucai LI, Yang GAO

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 121-131 doi: 10.1007/s11709-012-0151-0

Abstract: The tensile-shear failure criterion and the Griffith failure criterion were implanted into the EDEM toSimulation results indicated that the EDEM model with the tensile-shear failure criterion has strongThe EDEM model with the Griffith failure criterion can only simulate the splitting failure of samplesResearch results demonstrated that sample failure primarily resulted from the growth of single cracksAdditionally, the inclination angle of the pre-existing crack clearly influences the final failure pattern

Keywords： expanded distinct element method (EDEM)     crack growth     rock-like material     tensile-shear failure criterion     Griffith failure criterion     mechanical and failure behavior    

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Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 35-43 doi: 10.1007/s11709-012-0142-1

Abstract: The relevance of carrying out hydraulic analysis in arch dam foundation failure studies is highlighted

Keywords： concrete dams     rock foundations     hydromechanical behavior     failure analysis    

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Integrated management of cardiac failure: the cardiac failure clinic

Daniel LOISANCE

Frontiers of Medicine 2011, Volume 5, Issue 1,   Pages 20-25 doi: 10.1007/s11684-011-0106-1

Abstract:

The prevalence of the risk factors and the risk of cardiac failure are both increasing in China.The wide range of clinical presentations of cardiac failure (acute or chronic) and of therapeutic approaches

Keywords： cardiac failure     cardiac transplantation     mechanical circulatory support    

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Influence of damages on static behavior of single-layer cable net supported glass curtain wall: full-scale

Gang SHI, Yongjiu SHI, Yuanqing WANG, Yongzhi ZUO, Xiaohao SHI, Zaoyang GUO,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 383-395 doi: 10.1007/s11709-010-0074-6

Abstract: To study the influence of such damages on the static behavior of the single-layer cable net supportedTwo kinds of damages that are the cable prestress loss and cable anchorage end failure are led into thewhile the change rate of nodal deflection is between 7% and 22% for the damage of cable anchorage end failure

Keywords： single-layer plane cable net supported glass curtain wall     damage     cable prestress loss     cable anchorage end failure    

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Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 623-642 doi: 10.1007/s11709-021-0726-8

Abstract: In this study, gradual and sudden reduction methods were combined to simulate a progressive failure inUsing the presented method, a progressive failure is simulated based on a linear softening law priorto a catastrophic failure, and thereafter, sudden reduction methods are employed for modeling a progressivefailure.The proposed method is intended to predict the first ply failure (FPF), LPF, and dominant failure modes

Keywords： progressive failure     notched composite plate     Hashin failure criterion     macro mechanics approach     finite    

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Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Frontiers of Structural and Civil Engineering   Pages 1033-1046 doi: 10.1007/s11709-023-0973-y

Abstract: This study focuses on the bending failure performance of a shield tunnel segment.A full-scale test was conducted to investigate deformation and failure characteristics.During the loading, the bending failure process can be divided into four stages: the elastic stage, workingstage with cracks, failure stage, and ultimate stage.The characteristic loads between contiguous stages are the cracking, failure, and ultimate loads.

Keywords： shield tunnel     bearing capacity     failure mechanism     segment reinforcement    

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Overview on acute-on-chronic liver failure

Jing Zhang,Shan Gao,Zhongping Duan,Ke-Qin Hu

Frontiers of Medicine 2016, Volume 10, Issue 1,   Pages 1-17 doi: 10.1007/s11684-016-0439-x

Abstract:

Liver failure (LF) is defined as severe dysfunction in hepatic synthesis, detoxification, and metabolism

Keywords： liver failure     chronic liver failure     acute-on-chronic liver failure     diagnosis     prognosis     treatment    

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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: Therefore, a novel failure mode involving three sliding zones (upper tension zone, middle shear slidingSubsequently, the new failure mode was verified via a numerical finite element analysis based on theThe results obtained by the new failure mode agree well with those obtained by the numerical analysis

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

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LSSVM-based approach for refining soil failure criteria and calculating safety factor of slopes

Shiguo XIAO; Shaohong LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 871-881 doi: 10.1007/s11709-022-0863-8

Abstract: The failure criteria of practical soil mass are very complex, and have significant influence on the safetyThe Coulomb strength criterion and the power-law failure criterion are classically simplified.machine (LSSVM), a machine learning model, is purposefully provided to establish a complex nonlinear failurepercentage error, and mean square error indicate that fitting precision of the machine learning-based failureBased on the proposed LSSVM approach to determine the failure criterion, the limit equilibrium method

Keywords： slope stability     safety factor     failure criterion     least square support vector machine    

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Study of high-strength CFRP bolted joints with failure- monitoring cone washers

Tsukasa KATSUMATA, Yoshihiro MIZUTANI, Akira TODOROKI, Ryosuke MATSUZAKI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 272-276 doi: 10.1007/s11465-011-0231-1

Abstract: The increase in failure load for the proposed joint was confirmed in finite-element method analyses and

Keywords： composite     bolted joint     failure monitoring     finite-element method    

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Analysis of stress and failure in rock specimens with closed and open flaws on the surface

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1222-1237 doi: 10.1007/s11709-021-0773-1

Abstract: The influence of closed and open surface flaws on the stress distribution and failure in rock specimensinvestigate the influences of the flaw inclination, friction coefficient and the confining stress on failurebehavior.Numerical results show significant differences in the stress, displacement, and failure behavior of theThe presented results in this article suggest that failure at the rock surface may be managed in a favorable

Keywords： surface flaw     heterogeneity     circular hole     numerical modeling     relative displacement    

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Title Author Date Type Operation

Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Journal Article

A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Journal Article

Measurement of dynamic fracture toughness and failure behavior for explosive mock materials

Pengwan CHEN, Zhongbin ZHOU, Shaopeng MA, Qinwei MA, Fenglei HUANG

Journal Article

Effect of TGO on the tensile failure behavior of thermal barrier coatings

Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU

Journal Article

Application of the expanded distinct element method for the study of crack growth in rock-like materials under uniaxial compression

Lei YANG, Yujing JIANG, Bo LI, Shucai LI, Yang GAO

Journal Article

Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

Journal Article

Integrated management of cardiac failure: the cardiac failure clinic

Daniel LOISANCE

Journal Article

Influence of damages on static behavior of single-layer cable net supported glass curtain wall: full-scale

Gang SHI, Yongjiu SHI, Yuanqing WANG, Yongzhi ZUO, Xiaohao SHI, Zaoyang GUO,

Journal Article

Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Journal Article

Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Journal Article

Overview on acute-on-chronic liver failure

Jing Zhang,Shan Gao,Zhongping Duan,Ke-Qin Hu

Journal Article

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

Journal Article

LSSVM-based approach for refining soil failure criteria and calculating safety factor of slopes

Shiguo XIAO; Shaohong LI

Journal Article

Study of high-strength CFRP bolted joints with failure- monitoring cone washers

Tsukasa KATSUMATA, Yoshihiro MIZUTANI, Akira TODOROKI, Ryosuke MATSUZAKI

Journal Article

Analysis of stress and failure in rock specimens with closed and open flaws on the surface

Journal Article