北京冬季奥运村人才公租房项目结构抗震性能分析

Seismic behavior analysis of public rental housing project of Beijing Winter Olympic Village

为研究采用钢框架-防屈曲钢板墙结构的北京冬季奥运村人才公租房项目的抗震性能,建立了反映两边连接防屈曲钢板墙受力特点的简化模型——等效交叉支撑模型,介绍了等效交叉支撑模型中初始刚度、单根支撑的等效截面面积、支撑屈服强度等关键参数的计算方法。选取典型户型结构,建立钢框架-防屈曲钢板墙结构整体精细化有限元计算模型,研究该双重抗侧力体系的变形特点、构件失效顺序、塑性发展模式、内力分配关系以及结构刚度退化过程;对防屈曲钢板墙在结构中的消能减震能力进行评价。通过该类结构抗震性能的研究分析表明,结构满足“大震不倒”的抗震设防目标。

In order to study the seismic performance of public rental housing project of Beijing Winter Olympic Village with steel frame-buckling restrained steel plate wall structure,a simplified model of an equivalent cross brace model which can reflect the force characteristics of buckling restrained steel plate wall with two side connections was established,and the calculation methods of the initial stiffness,the equivalent section area of single brace,the yield strength of brace and other key parameters in the equivalent cross brace model were introduced.A typical house structure was selected,and the refined finite element model of steel frame-buckling restrained steel plate wall structure was established to study the deformation characteristics,member failure sequence,plastic development mode,internal force distribution relationship and structural stiffness degradation process of the dual lateral force resisting system.The energy dissipation capacity of buckling restrained steel plate wall in the structure was evaluated.Through the research and analysis of the seismic performance of this kind of structure,it shows that the structure can meet the seismic fortification goal of"no collapse under big earthquakes".