带BRB的钢筋混凝土框架-核心筒结构的地震响应分析

Analysis of Seismic Response on Buckling Restrained Braces Reinforced Concrete Frame Core-tube Structures

以某20层的钢筋混凝土框架-核心筒结构为研究对象,利用ETABS软件建立普通框架-核心筒结构和带BRB支撑的框架-核心筒两种结构模型,分别采用反应谱分析和非线性时程分析的方法对两种模型进行计算分析对比。结果表明,在多遇地震下,带BRB的钢筋混凝土框架-核心筒结构在层间位移角、最大楼层位移等方面均有一定的控制效果,而且可以提高结构的抗侧刚度和抗扭刚度。在罕遇地震下,带BRB的结构具有很好的耗能效果,能够较好地改善结构的抗震性能。

In this paper,a 20-stroey concrete frame core-tube structure is studied,which was based on etabs. Com- puter models of buckling restrained braces-reinforced concrete frame core-tube structures and not with BRB were set up,and seismic perfermances of the models were calculated by adopting response spectrum analysis and nonlin- ear time history analysis. The results show that under the action of earthquake,the structure with BRB exerts cer- tain control effect on the aspects of inter-story displacement angle and the maximum floor displacement, but also in- crease lateral stiffness and torsional performance. Under the severe earthquake action,BRB have a good effection on energy dissipation, at the same time, it can better improve the seismic performance.