短桩-剪力墙体系的非线性位移反应分析与评估  

Nonlinear displacement response analysis and evaluation of short pile-shear wall system

作　　者：孔祥刚[1] 张信贵[2] 付希尧 Kong Xiang-gang;Zhang Xin-gui;Fu Xi-yao(Guangxi Polytechnicof Construction,Nanning 530003,China;School of Civil andArchitectural Engineering,Guangxi University,Nanning 530003,China)

机构地区：[1]广西建设职业技术学院,广西南宁530003 [2]广西大学土木建筑工程学院,广西南宁530003

出　　处：《工程抗震与加固改造》2020年第3期15-20,共6页Earthquake Resistant Engineering and Retrofitting

基　　金：广西自然科学基金项目(2018JJB160025)。

摘　　要：在考虑桩-土-结构动力相互作用的情况下,针对短桩基础-高层剪力墙体系在罕遇地震作用下的位移反应问题,以位于南宁盆地某高层住宅楼项目为工程背景,基于ABAQUS软件为平台的平行计算技术,对土体-群桩-地下室-上部结构体系进行了水平地震反应三维数值模拟,土体的动力非线性采用修正Drucker-Prager模型,地震荷载为水平双向输入,分析结果表明:(1)整个上部结构中,第32层顶板的水平相对位移峰值最大,随着楼层降低,各层楼板的水平相对位移峰值呈渐进式减小;(2)同一楼层不同位置的相对位移反应幅值和相位的差异显著,说明上部结构的楼层平面发生了扭转变形;(3)根据上部结构的位移时程反应分析结果,说明输入地震动的特性能够明显影响地下结构的位移反应;(4)从上部结构相对位移反应的角度分析,使用短桩基础的高层剪力墙结构整体抗震性能良好。Considering the dynamic interaction of pile,soil and structure,aimed at the nonlinear displacement response of short pile foundation and shear wall system under the rare earthquake load,based on a high rise residential building project located in the Nanning basin as the engineering background,and based on the parallel computing technology of the ABAQUS software as the platform,the numerical simulation of the three-dimensional horizontal seismic response of the two element stratum-pile group-basementsuperstructure system is carried out,the dynamic nonlinear performance of soil is modified by Drucker-Prager model,and horizontal bidirectional input is adopted for seismic load.The results show that:①in the whole superstructure,the peak horizontal relative displacement of the 32nd floor is the largest,with the decrease of the floor,the peak horizontal relative displacement of each floor decreases gradually;②the difference of relative displacement response amplitude and phase in different positions of the same floor is significant,which indicated that the floor plane of the superstructure has torsional deformation;③according to the time history analysis results of displacement response of superstructure,it is shown that the characteristics of input ground motion can significantly affect the displacement response of underground structure;④from the point of view of relative displacement response of superstructure,the overall seismic performance of high-rise shear wall structure with short pile foundation is good.

关 键 词：短桩基础 剪力墙结构 地震响应 桩-土-结构相互作用 

分 类 号：TU443[建筑科学—岩土工程]