地震液化场地侧移作用下桩基破坏数值分析研究的中期报告.docx

地震液化场地侧移作用下桩基破坏数值分析研究的中期报告
摘要：
本文研究了地震液化场地中的桩基受侧移作用下的破坏行为。数值模拟采用ABAQUS软件，建立了三维有限元模型，考虑了液化土体和桩基的非线性行为。利用该模型，模拟了侧移作用下桩基受力变化的过程，并分析了不同侧移距离对桩基破坏的影响。结果表明，随着侧移距离的增加，桩基的受力情况显著变化，同时桩基的破坏位置发生移动。在侧移距离较小的情况下，桩基主要受到弯曲和剪切力的作用，破坏位置在靠近地表的部位，而在侧移距离较大的情况下，桩基主要受到弯曲和挤压力的作用，破坏位置逐渐向桩身深部移动。研究结果为地震液化场地中桩基的设计和施工提供了科学依据。
关键词：地震液化场地；桩基；侧移作用；破坏行为；数值分析
Abstract:
Thispaperstudiesthefailurebehaviorofpilefoundationunderlateraldisplacementinearthquakeliquefactionsite.ThenumericalsimulationusesABAQUSsoftwaretoestablishathree-dimensionalfiniteelementmodel,consideringthenonlinearbehaviorofliquefiedsoilandpilefoundation.Usingthismodel,theprocessofforcechangeofpilefoundationunderlateraldisplacementwassimulated,andtheinfluenceofdifferentlateraldisplacementdistancesonpilefoundationfailurewasanalyzed.Theresultsshowthatwiththeincreasingoflateraldisplacementdistance,theforcesituationofpilefoundationchangessignificantly,andthefailurepositionofpilefoundationmoves.Whenthelateraldisplacementdistanceissmall,thepilefoundationismainlysubjectedtobendingandshearforces,andthefailurepositionisnearthegroundsurface,whilewhenthelateraldisplacementdistanceislarge,thepilefoundationismainlysubjectedtobendingandcompressionforces,andthefailurepositiongraduallymovestothedeeppartofthepilebody.Theresearchresultsprovideascientificbasisforthedesignandconstructionofpilefoundationinearthquakeliquefactionsite.
Keywords:earthquakeliquefactionsite;pilefoundation;lateraldisplacement;failurebehavior;numericalanalysis.