考虑群体效应的高层建筑土-结构相互作用参数研究

Parametric Study on Interaction Between Soil and Group of High-rise Buildings under Seismic Excitation

采用ANSYS软件建立考虑群体效应影响的三维高层建筑的有限元模型。模型采用软土地基,上部建筑群为三栋框架剪力墙结构。研究土性、上部结构刚度、基础埋深和地震波等参数对结构-土-结构动力相互作用体系的动力特性和动力反应的影响。结果表明:随着土性的变化,SSSI体系的动力响应也会发生变化;上部结构刚度较大时,群体效应对体系的影响较显著;基础埋置深度的增大会削弱体系的动力反应;不同地震波激励下体系的动力响应不同。

ANSYS software is adopted to establish a three-dimensional model of high-rise building group.The soft soil is selected as ground soil,and the upper buildings are three frame-shear-wall structures in the model.The influences of soil property,rigidity of upper structures,buried depth and seismic type on dynamic responses of SSSI system are studied.The results show that the changes of soil properties affect the dynamic responses of system.Group effect is obvious when the stiffness of the uppper structure is large.The increase of the foundation depth weakens the dynamic responses.The dynamic response is different under the actions of different seismic waves.