考虑共同作用时地基刚度变化对筏板沉降和内力的影响  

Influence of Foundation Soil Stiffness to Foundation Settlement and Internal Force Considered Interaction

作　　者：田丹丹[1] 张富钧 王国龙 Tian Dan-dan;Zhang Fu-jun;Wang Guo-long

机构地区：[1]甘肃交通职业技术学院,兰州730070 [2]金昌市规划建筑设计院,甘肃金昌737100

出　　处：《建筑技术开发》2020年第6期160-161,共2页Building Technology Development

基　　金：2019年度甘肃省高等学校创新能力提升项目(2019A-232)

摘　　要：利用大型通用有限元软件ANSYS14.0建立了框架结构–桩筏基础–地基共同作用的整体有限元分析模型。通过改变地基的刚度来研究考虑共同作用后筏板的沉降和筏板内力的变化规律。计算结果表明:在上部结构和基础不变的情况下,筏板的沉降随地基土体弹性模量的增加而减小,且差异沉降也相对减小。随着地基土弹性模量的增加,筏板上最大拉应力和最大压应力虽然在减小,但是减小幅度很小,应力集中区域也基本相同。In this paper,a finite element model of the interaction between frame structure-pile-raft foundation-foundation was established by using the large-scale general finite element software ANSYS14.0.By changing the stiffness of foundation soil,the settlement of the raft and the change of the raft internal force are studied.The results show that:keep the structure and the foundation the same,with the increase of modulus of elasticity of soil,the foundation settlements reduce,the differential settlements reduce,too.With the increase of modulus of elasticity of soil,the maximum tensile stress and the maximum compressive stress weaken,too.In region of stress concentration,it has same results.

关 键 词：地基刚度 基础沉降 基础内力 数值模拟 

分 类 号：TU470[建筑科学—结构工程]