Abstract:A 2D coupled method for dynamic analysis of site-buildings system during earthquakes is developed in this study. In this method, the far field soil and near field soil is modeled by indirect boundary element method (IBEM) and finite element method (FEM), respectively, and the buildings are modeled by rigid foundations-blocks calculated by analytical solution. This coupled method requires relative small calculation as element discretization is not required in the buildings model, and moreover the structural parameters are simple and intuitive. In addition, as FE-IBE coupled method it can meet the radiation condition at infinity of the site without artificial boundary. The method is verified by comparison with published results. Numerical calculations are conducted to analyze the effects of site-buildings interaction on structural response at various locations. It’s shown that the effects of site-building interaction may increase structural response amplitude significantly, which is related with the characteristics of the whole site-buildings system and the seismic wave; in addition, if the buildings are characterized by great structure rigidity and similar with each other, the amplification of site-buildings interaction is significant, especially for the building in the center and it is up to 36.17% in our numerical cases. If buildings are arranged based on structural parameters (such as low-rise area, high-rise area), the site-buildings effect may have relatively larger effect on seismic response of the center building in each area.
韩冰1,梁建文2,杨晶丽2. 一种用于场地-建筑群体系地震响应分析的二维耦合法[J]. 振动与冲击, 2023, 42(18): 100-111.
HAN Bing1,LIANG Jianwen2,YANG Jingli2. 2D coupled method for the seismic analysis of a site-buildings system. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(18): 100-111.
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