摘要
采用ANSYS程序建立了3层框架结构加2层钢框架后的有限元模型,对该加层框架结构在设置约束屈曲支撑前后进行多遇及罕遇地震作用下的时程分析对比.结果表明,设置了约束屈曲支撑后增加了结构的耗能能力:层间位移角最大折减率达到47.8%,提出了混合结构比较合理的阻尼比,达到了对结构振动控制的目的,并且较精确地反映了设置约束屈曲支撑后该结构地震反应的实际,是一种较为实用和精确的计算方法.
A finite element model for a frame structure of three floors adding two storeys on top of it is set up by using ANSYS. By analyzing and comparing the two cases of adding steel stories with and without braces under the conditions of multiple or rare earthquakes, it is shown that the buckling restraining braces can enhance the structure＇s aseismic capacity,the maximum reducing ratio of storey-to-storey shift angle is as high as 47.8%. It can raise the rational damping ratio of the hybrid structure and control its vibration and accurately reflect the seismic response of the structure. It is a practical and precise calculat- ing method.
出处
《甘肃科学学报》
2012年第3期21-25,共5页
Journal of Gansu Sciences
基金
国家自然科学基金项目(51068019)
关键词
ANSYS软件
约束屈曲支撑
时程分析
层间位移角
software ANSYS
buckling restraining brace
time history analysis
storey-to-storey shift angle
