摘要
安装抑制屈曲支撑可提高钢框架结构抗震性能,但抑制屈曲支撑布置原则对其耗能减振作用的发挥有重要影响。基于ANSYS采用弹塑性静力分析和弹塑性动力分析,基于9层Benchmark钢框架结构模型对抑制屈曲支撑三种不同布置原则对结构抗震性能的影响进行了分析。结果表明:基于支撑与框架刚度比或基于结构层间剪力分布布置支撑时结构延性较好,其中基于支撑与框架刚度比布置支撑时结构的层间位移角分布最均匀,其对提高结构体系抗侧刚度和耗能能力最为有效。因此在对抑制屈曲支撑钢框架进行设计时,宜采用基于支撑与框架刚度比布置支撑的方法。
When the steel frames are installed with Buckling-Restrained Braces （BRBs）, whose aseismic performance will be improved, but the function of energy dissipation and vibration control is influenced by the layout principle of BRBs. The elastoplastic static and dynamic analysis based on ANSYS was carried out. Based on 9 storey Benchmark steel frame structure, the influence of three layout principles of BRBs on structural aseismic performance was analyzed. While the BRBs are disposed by the basis of the stiffness proportion of BRBs with steel frames and storey displacement angle distributions, the ductility performance of the steel frame with BRBs is better. If the storey displacement angles are more uniform, the stiffness and energy dissipation are larger when the BRBs are disposed based on the stiffness proportion of BRBs with steel frames. So when the steel frame with BRBs is designed, it is appropriate that the BRBs are disposed by the basis of the stiffness proportion of BRBs with the steel frame.
出处
《工程力学》
EI
CSCD
北大核心
2009年第7期140-146,共7页
Engineering Mechanics
基金
国家自然科学基金项目(90715021
50678057
50108005)
科技部国家"十一五"技术支撑项目子课题
地震行业科研专项项目(2008419073)
黑龙江省自然科学基金重点项目(ZJG0701)
中国博士后科学基金项目(20080440891)
关键词
结构抗震性能
抑制屈曲支撑
支撑布置原则
钢框架地震响应
structural seismic performance
buckling-restrained braces
layout principle of BRBs
steel flame
seismic response
