框架结构-筏板基础-地基共同作用的数值分析

考虑框架结构、筏板基础和地基的共同作用，采用有限元分析模型，通过框架结构、筏板基础和地基之间在连接处的静力平衡和变形协调作用,形成共同作用分析方法，与非共同作用方法进行对比，分析框架结构柱轴力和弯矩的变化情况.有限元分析表明，在共同作用下，筏板基础发生“盆形”变形，框架结构应力重分布为角柱轴力增大，边柱和中柱轴力减小，柱的弯矩显著增大.共同作用下，不同厚度的筏板沉降量不同，厚度越大，筏板最大沉降量越小.

Analysis for Interaction Frame Structure,Raft Foundation and Subsoil

Considering the interaction of frame structure,raft foundation and ground base by using the numerical simulation method of ANSYS procedure and the condition of the stationary balance of the linked point between frame structure,raft foundation and the distortion harmony condition,the method of the interaction of frame structure,raft foundation and subsoil was formed.And comparson with the conventional design of frame structure in column internal force and column bending moment was made.Results show that when considering the interaction,the raft foundation deformed “basin shape”,and frame structure stress was re-distributed.Angle axial force increased,and the side column and the column axial force decreased,and the moment also significantly increased.Settlement of rafts of different thickness was different;with the increase of thickness,the maximal settlement became smaller.