粉土地区上部结构与地基基础共同作用有限元分析  

FEM analysis of interaction between upper structure and raft foundation in silty ground

作　　者：张曼[1] 曾长女[1] 田文礼[2] 

机构地区：[1]河南工业大学土木建筑学院,河南郑州450001 [2]华优建筑设计院郑州分院,河南郑州450000

出　　处：《岩土工程学报》2013年第S1期462-467,共6页Chinese Journal of Geotechnical Engineering

基　　金：河南工业大学创新基金项目(11YJCX60)

摘　　要：结合郑州地区广泛分布的粉土及其特殊的工程特性,采用ABAQUS数值模拟方法,研究粉土地区上部结构与地基基础共同作用下,上部结构分层施工、地基土含水率变化、筏板厚度等对筏板基础内力的影响。并对比了常规计算方法与共同作用方法的计算差异。计算结果表明,考虑共同作用时,筏板最大应力小于常规设计,并且位置由筏板中部向筏板边缘发生移动。当地基土含水率在增加到最优含水率时,在筏板外边缘出现局部弯曲变形,产生应力集中现象。当超过最优含水率时,随地基土含水率增大,基底反力向周围扩散,筏板应力分布较为均匀。The interaction between upper structure and raft foundation in silty ground is analyzed based on the special silty ground in Zhengzhou using ABAQUS.The effects of upper structure,construction stage and content of the silty soil on the interaction are considered.The differences between the conventional method and the combination method are compared.The results show that when considering the interaction the maximum stress of raft is less than that of the conventional design,and it will move from the center to the edge of raft.When increasing the water content of silty soil to its optimum water content,local bending and stress-concentrated phenomena will occur at the edge of raft foundation.While the water content exceeds the optimum water content,the base reaction force spreads around and the stress becomes uniform.

关 键 词：筏板基础应力 共同作用 粉土地基 有限元分析 

分 类 号：TU449[建筑科学—岩土工程]