罕遇地震作用下短桩基础-高层剪力墙体系非线性内力反应研究  

Research on Nonlinear Internal Force Reaction of Short-pile Foundation & High-rise Shear Wall System Under Effect of Rare Earthquakes

作　　者：孔祥刚 张信贵[1] 李朝阳[2] KONG Xianggang;ZHANG Xingui;LI Chaoyang(School of Civil Engineering,Guangxi University,Nanning ,Guangxi530003,China;Guangxi Polytechnic of Construction,Nanning ,Guangxi530003,China)

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

出　　处：《施工技术》2018年第22期32-36,共5页Construction Technology

摘　　要：在考虑桩-土-结构动力相互作用的条件下,系统分析高层建筑的地震反应始终是地震工程和结构工程的重点和难点。针对短桩基础-高层剪力墙结构在罕遇地震荷载作用下的内力反应,以位于南宁盆地的某高层住宅楼项目为工程背景,基于ABAQUS软件,对二元地层-群桩-筏板-地下室-上部结构体系进行三维水平地震反应数值模拟,土体动力非线性性能采用修正Drucker-Prager模型,地震激励采用水平双向输入。分析结果表明:整个上部结构中,1层剪力墙的竖向正应力峰值最大,随着楼层增高,剪力墙的竖向正应力峰值呈波动式减小;结构内部剪力墙的正应力峰值减小速率大于外侧剪力墙;处于下侧的剪力墙的水平剪应力峰值大于其他位置的剪力墙,地震时被破坏的可能性最大。Considering the pile-soil-structure dynamic interaction,the analysis of seismic response of high-rise buildings is always the focus and difficulty of seismic engineering and structural engineering. Aiming at the internal force reaction of short pile foundation &high-rise shear wall structure under rare earthquake loads,taking a high-rise residential building project located in Nanning Basin as the engineering background,the three-dimensional horizontal seismic response of the binary stratum-pile group-raft-basement-superstructure system is calculated based on the parallel computing technology of ABAQUS software.The results show that the peak value of vertical normal stress of the shear wall is the largest in the whole structure,and the peak value of vertical normal stress of the shear wall decreases with the rise of the floor.The peak value of normal stress decreases faster than that of lateral shear wall,and the shear wall at the lower side has a higher peak value of horizontal shear stress than the shear wall at other locations,so it is most likely to be destroyed during earthquakes.

关 键 词：高层建筑 基础 短桩基础 剪力墙 地震响应 有限元分析 

分 类 号：TU97[建筑科学]