筏板刚度对桩顶反力和桩筏荷载分担比的影响  

The Influence of Raft Stiffness on Pile Top Reaction and Pile-Raft Load Sharing Ratio

作　　者：张富钧 李锦龙 Zhang Fujun;Li Jinlong(Gansu Vocational and Technical College of Communications,Lanzhou Gansu 730070,China;Guizhou Transportation Planning Survey&Design Academy Co.,Ltd.,Guiyang Guizhou 550081,China)

机构地区：[1]甘肃交通职业技术学院,甘肃兰州730070 [2]贵州省交通规划勘察设计研究院股份有限公司,贵州贵阳550081

出　　处：《城市建筑》2021年第36期137-139,共3页Urbanism and Architecture

基　　金：路桥工程类专业指导委员会“高层建筑框架剪力墙结构-桩筏基础-地基共同作用有限元分析”(LQZZW202009);2020年度甘肃交通职业技术学院教学改革工程项目“道桥专业课程思政建设的探索与实践——以《道路建筑材料》课程为例”。

摘　　要：文章以某住宅楼为研究算例,利用SAP2000有限元分析软件建立"框架剪力墙结构—桩筏基础—地基"共同作用的三维模型。通过改变筏板厚度对模型计算分析,发现当增加筏板厚度,即筏板刚度增加时,边桩和角桩的桩顶反力会增大,筏板分担荷载的比例也随之增加。增加筏板刚度可以调节筏板内力分布,但筏板刚度的贡献是有限的。Taking a residential building as an example,this paper establishes a three-dimensional model of the interaction of frame shear wall structure,pile-raft foundation and foundation by using SAP2000 finite element analysis software.By changing the thickness of the raft,the model is calculated and analyzed.It is found that when the raft stiffness increases,the pile top reaction force of the side pile and angle pile increases,and the load sharing ratio of the raft increases accordingly.Increasing the raft stiffness can adjust the distribution of the raft internal forces and reduce the settlement of the raft,but the contribution of the raft stiffness is limited.

关 键 词：共同作用 筏板刚度 桩顶反力 数值模拟 

分 类 号：TU973.16[建筑科学—结构工程]