Seismic Bearing Capacity Factor Considering Composite Failure Mechanism: Pseudo-Dynamic Approach

IF 0.5 Q4 ENGINEERING, GEOLOGICAL

International Journal of Geotechnical Earthquake Engineering Pub Date : 2018-01-01 DOI:10.4018/IJGEE.2018010104

Swetha Kurup, S. Kolathayar

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引用次数: 6

Abstract

Thisarticledescribeshowthedesignofshallowfoundationneedscompleteknowledgeaboutbearing capacity.Duringearthquakesadditionallateralforceactsatthefoundationbedwhichreducesthe bearingcapacity.Mostoftheliteraturepresenteitherthepseudostaticanalysisorassumeaplanar failuresurfacetoestimateseismicbearingcapacityfactors.Here,apseudodynamicapproachthat considersthetimedependenteffectofearthquakeloadingisemployed.Acompositefailuresurface hasbeenconsideredforamorerealisticestimationofseismicbearingcapacity.Newexpressionswere formulatedtoarriveattheseismicbearingcapacityfactor,consideringtheforcesactingonthefailure wedgebasedonthelimitequilibriumapproach.Theeffectofsoilfrictionanglesandtheseismicpeak ofhorizontalgroundaccelerationsontheseismicbearingcapacitywerestudiedusingtheproposed method.Itwasobservedthatpresentpseudo-dynamicanalysiswithacompositefailuremechanism giveslowervaluesofseismicbearingcapacityfactorswhencomparedtopseud-staticanalysis. KEywoRDS Earthquakes, Limit Equilibrium, Pseudo Dynamic Method, Seismic Bearing Capacity, Shallow Foundations

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考虑复合破坏机制的地震承载力因子:拟动力方法

Thisarticledescribeshowthedesignofshallowfoundationneedscompleteknowledgeaboutbearing容量。Duringearthquakesadditionallateralforceactsatthefoundationbedwhichreducesthe bearingcapacity。Mostoftheliteraturepresenteitherthepseudostaticanalysisorassumeaplanar failuresurfacetoestimateseismicbearingcapacityfactors。Here，apseudodynamicapproachthat considersthetimedependenteffectofearthquakeloadingisemployed。Acompositefailuresurface hasbeenconsideredforamorerealisticestimationofseismicbearingcapacity。Newexpressionswere formulatedtoarriveattheseismicbearingcapacityfactor，consideringtheforcesactingonthefailure wedgebasedonthelimitequilibriumapproach。Theeffectofsoilfrictionanglesandtheseismicpeak ofhorizontalgroundaccelerationsontheseismicbearingcapacitywerestudiedusingtheproposed方法。Itwasobservedthatpresentpseudo-dynamicanalysiswithacompositefailuremechanism giveslowervaluesofseismicbearingcapacityfactorswhencomparedtopseud-staticanalysis。关键词地震，极限平衡，拟动力法，抗震承载力，浅基础

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来源期刊

International Journal of Geotechnical Earthquake Engineering ENGINEERING, GEOLOGICAL-

CiteScore

1.90

自引率

25.00%

发文量