摘要
为减轻强震对传统钢框架结构造成的破坏性损伤,提出了一种带弹簧支座连接的新型摇摆钢框架结构。基于有限元软件SAP2000建立的弹塑性分析模型,采用数值模拟的方法对新型摇摆钢框架结构进行了推覆分析与动力时程分析以研究其抗震性能,并进一步分析了支座约束、结构高宽比以及刚体位移比对新型摇摆钢框架结构抗震性能的影响。结果表明,与传统钢框架结构的抗震性能相比,新型摇摆钢框架结构的延性提升,有害层间位移角与残余层间位移角大幅度降低,表现出良好的低损伤与自复位特性;在一定范围内,增大刚体位移比,能够进一步提高新型摇摆钢框架结构的抗震能力。
To alleviate the destructive damage caused by strong earthquakes in conventional steel frame structures,this study proposes a novel rocking steel frame structure with spring-supported connections.Utilizing the finite element software SAP2000,an elastoplastic analysis model was established to evaluate the structure’s performance through pushover analysis and dynamic time-history analysis.Additionally,the effects of support constraints,height-to-width ratio,and rigid-body displacement ratio on the seismic behavior of the rocking steel frame structure were investigated.The results demonstrate that,compared to the conventional steel frames,the proposed system exhibits enhanced ductility,along with significantly reduced harmful and residual inter-story drift angles,highlighting its low-damage and self-centering capabilities.Furthermore,within a specific range,increasing the rigid-body displacement ratio improves the structures’s overall seismic resistance.
作者
赵威
陈云
ZHAO Wei;CHEN Yun(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China)
基金
国家自然科学基金项目(52378504)
海南省重点研发计划项目(ZDYF2021SHFZ070)
海南省重点研发“揭榜挂帅”项目(ZDYF2022SHFZ353)。
关键词
摇摆钢框架结构
抗震性能分析
有限元分析
有害层间位移角
残余层间位移角
rocking steel frame structure
seismic performance analysis
finite element analysis
harmful interstory drift angle
residual interstory drift angle
