巨型框架结构、筏基刚度对砂卵石土地基影响的有限元分析

Analysis of Effects on Rigidity of Mega Frame Structure and Raft Foundation to Sandy Pebble Soil Foundation

根据室内试验选取了土体的物理参数,从上部结构、筏基两方面通过有限元分析考虑相互作用模型施工过程中巨型框架结构、筏基刚度对砂卵石土基的沉降和应力分布影响.结果表明:巨型框架结构刚度对基础的沉降和内力以及地基的反力有比较明显影响,但结构的层数影响是有限的;随着筏基刚度增加,基础的沉降和差异沉降减小,基底反力向边缘集中,应力分布越不均匀,正应力增大.这对同类问题的研究和应用中有一定的参考价值.

Physical parmeters were selected according to the experiment.Effects of rigidity of mega frame structure and raft foundation influence on sandy pebble soil foundation settlement and stress distribution in construction process were analyzed.The results demonstrated that superstructure rigidity influences foundational settlement and reaction force of subgrade foundation more significantly than layer of structure finite.As raft plate rigidity increases,foundational settlement and differential settlement decrease.Reaction force of subgrade foundation concentrates towards the edge,resulting in distribution ununiformity and normal stress increase.