摘要
某栋6层钢筋混凝土框架结构,因进行1层轻钢加层后未满足抗震性能要求,需要采用防屈曲耗能支撑进行减震加固。利用有限元软件SAP 2000分别对原结构及加固后的结构进行弹塑性分析,从结果可知:在弹性阶段,防屈曲耗能支撑提供有效的侧向刚度,改善结构抗扭转性能,控制层间位移;在塑性阶段,防屈曲耗能支撑能发挥减震耗能性能,成为结构抗震消能的第一道防线。
A six-story reinforced concrete frame structure was laken for example,whose requirements for seismic performance were not satisfied after a light-steel story was added on its top,and this structure was reinfored using buckling restrained braces. Elastic-plastic analysis of previous structure and the reinforced structure was performed using finite element software SAP 2000. The analysis result showed that in the elastic stage,the buckling restrained braces provided effective lateral stiffness,which improved the structure anti-torsion performance and the story drift decreased; in the plastic stage,the buckling restrained braces could give larger damping and energy dissipation performance,which could be the first line of defense for seismic energy dissipation of the structure.
出处
《工业建筑》
CSCD
北大核心
2016年第3期167-171,共5页
Industrial Construction
关键词
轻钢加层
防屈曲耗能支撑
静力弹塑性计算
时程分析
塑性铰
light gauge steel structure story
buckling restrained brace
pushover
time-history analysis
plastic hinge
