小高层塔式住宅三种结构体系抗震性能分析

Analysis of the Seismic Behavior of Three Kinds of Structural Systems of Small High-rise Tower Buildings

小高层建筑高度是多种结构体系的适用高度,结构抗震性能对设计中如何选择结构体系尤为重要。为研究小高层住宅在不同结构体系下的抗震性能,对某7度区11层普通塔式住宅楼分别设计成框架结构、框架-剪力墙结构和剪力墙结构,采用盈建科软件进行弹性计算,采用PERFORM-3D软件进行弹塑性时程分析。分析结果表明:三种结构体系均能满足大震下梁首选屈服,竖向受力构件不屈服;框架-剪力墙结构层间位移角控制较好,剪力分配情况没有明显改变;框架结构塑性耗能所占比例最高,剪力墙结构构件塑性耗能所占比例最少。三种结构体系均表现出良好的抗震性能。

Small high-rise building is suitable for several structural systems,and its seismic performance is very important to choose structural system in structural design. In order to analyze the seismic performance of small highrise residential buildings under different structural systems,an ordinary residential tower building of 11 floors in 7degree area was designed as a frame structure,frame-shear wall structure and shear wall structure respectively. Elastic calculation of all structures was conducted by the software of YJK and elasto-plastic time-history analyses were conducted based on FE model built by the software of PERFORM-3D. The results show that all of the three kinds of structure system can meet the requirement that the beam yield firstly,but vertical force component dose not yield in rare earthquake; on the frame-shear wall structure,the inter-story drift angle can be controlled better,and there is no significant change in shear distribution. The proportion of plastic energy dissipation of frame structure is the highest and of the shear wall structure is the least among the three structures. All kinds of structure systems show good seismic behavior.