摘要
带竖向连梁的偏心支撑组合框架具有良好的力学性能,是一种高效的耗能减震结构体系,但由于试验研究的数量有限,仅从单个构件试验并不能完全证明该结构体系的优越性和适用性。该文对带竖向连梁的偏心支撑组合框架展开理论研究,详细分析了各设计参数对结构抗震性能的影响。首先,该文建立该结构体系的结构力学理论模型,推导侧向荷载作用下结构的内力分布结果与变形分布结果,并提出该结构的理论骨架曲线,给出理论骨架曲线关键点的计算方法,与试验结果吻合良好。根据该文建立的理论模型,可计算出在不同侧向荷载作用下,结构的内力分布与变形模式。此外,理论模型分析的结果显示,在引入偏心支撑构件后,原组合框架的梁端和柱端的内力增加,跨中框架梁内力增加,混凝土板的损伤增加,结构的侧向刚度明显提升,与试验结果分析得到的结论完全一致,进一步验证理论模型的准确性。
Eccentrically braced composite frame with vertical shear link is an efficient energy dissipation structure system with good mechanical properties.However,limited ex-perimental studies cannot fully demonstrate the superiority and applicability of this kind of structure system.In this paper,the theoretical study on eccentrically braced composite frame with vertical shear link is carried out.First,the theoretical model of the structure system is established to give a detailed description of the key parameters.The results of internal force and deformation distribution under lateral load are derived,and the theoretical skeleton curve of the structure is proposed.According to the theoretical model,the internal force dis-tribution and deformation mode of the structure under different lateral loads can be calculat-ed.The research results show that after the introduction of eccentric bracing member,the internal forces at the end of beam and column of the original composite frame,the internal forces at the mid-span of the frame,the damage to the concrete slab increase.and the lateral stiffness of the structure increase significantly.The theoretical results agree well with the ex-perimental ones,which verifies the accuracy of the theoretical model.
作者
李易凡
王雨伦
赵继之
庄亮东
吴桢灏
Li Yifan;Wang Yulun;Zhao Jizhi;Zhuang Liangdong;Wu Zhenhao(Key Laboratory of Civil Engineering Safety and Durability of the Ministry of Education,Tsinghua University,Beijing 100084,China;School of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2024年第1期56-64,共9页
China Civil Engineering Journal
基金
国家自然科学基金(51890903)。
关键词
偏心支撑组合框架
剪切连梁
理论力学模型
骨架线
参数分析
eccentrically braced composite frame
shear link
theoretical model
skeleton curve
parameter analysis
作者简介
李易凡,博士研究生,E-mail:13120084917@163.com;通讯作者:赵继之,博士,副教授。
