摘要
为研究不同截面形式冷弯型钢-泡沫混凝土组合墙体的抗震性能,设计了3个足尺试件,分别为一字形、T形和工字形截面墙体.通过拟静力试验,得到各试件的破坏模式、滞回性能及应变分布情况,分析翼缘对墙体承载力、刚度、耗能及延性等力学指标的影响.结果表明:翼缘增强效应显著,与一字形截面墙体相比,T形截面墙体的峰值荷载、延性及耗能分别提高18.6%、20.1%和25.8%,工字形截面墙体的峰值荷载、延性及耗能分别提高74.8%、49.8%和119.4%;T形截面墙体正、负向加载的抗震性能差异较大,翼缘受拉方向的承载力和延性分别为反向加载的1.3倍和1.7倍,翼缘受压方向的抗震性能与一字形截面墙体接近;翼缘立柱的应变随着荷载的增加,逐渐呈中间大两端小的分布,存在剪力滞后效应.
To study the seismic performance of cold-formed steel-foam concrete composite walls with different cross sections,three full-size specimens were designed,which are rectangular,T-shaped and I-shaped section wall,respectively.The failure mode,hysteretic properties and strain distribution of each specimen were obtained through pseudo-static loading tests.The influence of flange wall on the bearing capacity,stiffness,energy dissipation and ductility were analyzed.The results show that the flange enhancement effect is significant.Compared with the rectangular section wall,the peak load,ductility and energy consumption of T-shaped section wall are increased by 18.6%,20.1%and 25.8%,respectively,and those of I-shaped section wall are increased by 74.8%,49.8%and 119.4%,respectively.The seismic performance of T-shaped section wall under positive and negative loading is different greatly.The bearing capacity and ductility in the tension direction of the flange are 1.3 and 1.7 times higher than those of the reverse loading,respectively.The seismic performance of the flange compression direction is close to that of the rectangular section wall.The strain of the flange studs gradually shows a distribution of large in the middle and small at both ends with the increase of load,and there is a shear lag effect.
作者
彭志明
陈忠范
徐志峰
黄宇浩
罗漪
Peng Zhiming;Chen Zhongfan;Xu Zhifeng;Huang Yuhao;Luo Yi(China-Pakistan Belt and Road Joint Laboratory on Smart Disaster Prevention of Major Infrastructures,Southeast University,Nanjing 211189,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province,Huaqiao University,Xiamen 361021,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第5期783-793,共11页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(52078120)。
关键词
冷弯薄壁型钢
泡沫混凝土
组合墙体
循环加载试验
抗震性能
cold-formed thin-walled steel
foam concrete
composite wall
cyclic loading test
seismic performance
