摘要
对一个单层单跨装配式偏心支撑钢框架进行拟静力循环加载试验,并利用ABAQUS软件对试验结果进行非线性数值模拟。在模拟结果正确的基础上建立了5个有限元模型,从承载能力、刚度退化、耗能能力等方面分析耗能梁段腹板开孔率对装配式偏心支撑钢框架力学性能的影响。结果表明:在单调荷载作用下,耗能梁段腹板开孔率对装配式偏心支撑钢框架承载力影响较大,随着耗能梁段腹板开孔率的增加,模型的屈服承载力和极限承载力逐渐降低;在循环荷载作用下,模型的初始刚度随着耗能梁段腹板开孔率的增加逐渐降低;模型的耗能能力受开孔率的影响不大,除了BASE模型以外,其余模型耗能系数均在1.55左右;适当的开孔率可以提高模型的延性系数,但是过大的开孔率会使构件过早破坏从而导致延性系数降低。
Pseudo-static cyclic loading tests of a single-layer and single span prefabricated eccentrically braced steel frames were carried out and the test results were simulated by ABAQUS software.On the basis of reasonable results,five finite element models were established.The influence of web openings on seismic behavior of prefabricated eccentrically braced steel frames was analyzed from bearing capacity,stiffness degradation and energy dissipation capacity.The results showed that the opening ratio of web of link had influence on its bearing capacity in the monotonic load,the yield bearing capacity and ultimate bearing capacity of model decreases with the web opening ratio.Under cyclic loading,the initial stiffness of the model decreased with the increased of web opening ratio.The energy consumption capacity of model was not affected obviously by the opening ratio,except for BASE model:the energy consumption coefficients of other models are around 1.55.Appropriate increase of opening ratio could improve the ductility coefficient of the model,however,too large opening ratio would lead to premature failure of the component,which would make the reduction of ductility coefficient.
作者
李通
时强
王新武
叶重阳
LI Tong;SHI Qiang;WANG Xinwu;YE Chongyang(School of Civil Engineering, Henan University of Science & Technology, Luoyang 471023, China;Henan International Joint Laboratory of New Civil Engineering Structure, Luoyang Institute of Science and Technology,Luoyang 471023, China;School of Science, Wuhan University of Science and Technology,Wuhan 430070,China)
出处
《郑州大学学报（工学版）》
CAS
北大核心
2021年第2期37-42,共6页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(51678284,51278238)
河南省科技创新杰出人才项目(184200510016)。
关键词
可替换耗能梁
偏心支撑
有限元
开孔率
滞回性能
replaceable shear links
eccentrically supported frame
finite element
opening ratios
hysteretic behavior
