摘要
以1栋9层钢框架中心支撑结构为背景,采用YJK软件建立有限元模型并进行了弹塑性分析,对塑性铰分布、可能出现的塑性耗能区和拟设定的塑性耗能区进行对比研究。结果表明:塑性铰的开展机制和预设吻合较好。设计时构件的实际性能系数满足最小性能系数,能够满足塑性耗能区应具有的延性。钢框架中心支撑结构体系整体在高烈度区滞回曲线不饱满,底层支撑破坏后,刚度退化较大,导致底层柱的损伤累计效应较大,破坏较严重。
Taking a 9-story steel frame central bracing structure as the background,the finite element model was established by YJK software and the elastic-plastic analysis was carried out.The distribution of plastic hinge,the possible plastic energy dissipation zone and the proposed plastic energy dissipation zone were compared and studied.The results show that the development mechanism of plastic hinge is in good agreement with the preset.The actual performance coefficient of the component meets the minimum performance coefficient during the design,which can meet the ductility of the plastic energy dissipation zone.The hysteresis curve of the steel frame central bracing structure system is not full in the high intensity area.After the bottom support is destroyed,the stiffness degradation is large,resulting in a large cumulative damage effect of the bottom column and serious damage.
作者
王晓斌
杨冬升
赵振华
王红瑛
李维维
WANG Xiaobin;YANG Dongsheng;ZHAO Zhenhua;WANG Hongying;LI Weiwei(School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang 550025,China)
出处
《建筑结构》
北大核心
2023年第19期128-133,共6页
Building Structure
基金
贵州省科技厅-贵州师范大学联合基金项目(黔科合LH字[2016]7216号)。
关键词
钢框架中心支撑结构
抗震性能化设计
塑性耗能区
塑性铰开展机制
steel frame central bracing structure
performance-based seismic design
plastic energy dissipation zone
plastic
