建筑数量对土-剪力墙结构建筑群动力相互作用的影响  

The influence of the number of buildings on the dynamic interaction of soil-shear wall structures

作　　者：熊峰[1] 雷鹏 葛琪[1] 吕洋 赵鹏[1] 刘洋 陈江[1] XIONG Feng;LEI Peng;GE Qi;LÜYang;ZHAO Peng;LIU Yang;CHEN Jiang(School of Architecture and Environment,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学建筑与环境学院,四川成都610065

出　　处：《振动工程学报》2021年第3期539-551,共13页Journal of Vibration Engineering

基　　金：国家自然科学基金青年项目(51508357);四川省国际科技创新合作/港澳台科技创新合作项目(2019YFH0120)。

摘　　要：在已完成的土与建筑群动力相互作用振动台试验的基础上,采用有限元方法进行参数分析,研究群效应对结构动力响应的影响。上部结构取为剪力墙,运用ANSYS有限元软件建立了土与建筑群相互作用的有限元模型,模型中运用Davidenkov模拟土体动力非线性。通过调整建筑物数量和布置方式,设置土与3栋建筑、土与5栋建筑、土与7栋建筑三个土-高层剪力墙结构建筑模型,将这三个模型分别与土与单栋建筑的有限元模型进行对比分析。结果表明:当上部建筑群主要沿振动方向布置时,将原剪力墙建筑群中平行于振动方向建筑数量增加后,建筑群群效应会有所增大,并且平行于振动方向的建筑受群效应影响较大;就层间位移对其进行机理分析,结果显示,当受到地震激励时,由于上部建筑的桩基与周围土体两种材料的弹性模量存在着巨大差异,会直接增大上部结构的层间位移,且沿振动方向的周边结构层间位移会大于中央区域结构。Based on the completed shaking table test of dynamic interaction between soil and building group,this paper uses finite element method to analyze the parameters and study the influence of group effect on structural dynamic response.The upper structure is taken as shear wall.The finite element model of soil and building group interaction is established by ANSYS finite element software.Davidenkov is used to simulate soil dynamic nonlinearity.By adjusting the number and layout of buildings,three soilhigh-rise shear wall building models of soil and 3 buildings,soil and 5 buildings,soil and 7 buildings are set up.These three models are compared and analyzed with the finite element model of soil and single building respectively.The results show that when the upper buildings are mainly arranged along the vibration direction,the cluster effect of buildings will increase,when the number of buildings parallel to the vibration direction in the original shear wall buildings increases,and the buildings parallel to the vibration direction are greatly affected by the cluster effect.Based on the mechanism analysis of the inter-layer displacement,the results show that the inter-layer displacement of the superstructure will directly increase,and the inter-layer displacement of the surrounding structure along the direction of vibration will be larger than that of the central region structure,because there is a huge difference in the elastic modulus between the pile foundation of the superstructure and the surrounding soil.

关 键 词：土-建筑群动力相互作用 剪力墙结构 多种群模型 数值分析 机理分析 

分 类 号：TU311.3[建筑科学—结构工程] TU398.2