新型砌体填充墙RC框架结构抗震性能研究

Seismic performance of new masonry-infilled reinforced concrete frame building

为了探究以烧结页岩空心砖作为新型填充砌体材料对RC框架结构抗震性能的影响,开展了3榀1/2缩尺的单层单跨填充墙钢筋混凝土(RC)框架的低周反复荷载试验,对比各试件的破坏特征、滞回曲线、骨架曲线、强度退化、刚度退化和耗能能力等指标,研究纯框架、完全填充墙框架和开洞填充墙框架的抗震性能。结果表明:烧结页岩空心砖砌体填充墙的存在提高了结构的侧向承载力、侧向刚度,有利于结构在小震作用下的变形控制和抵抗荷载的能力;相较于完全填充墙框架,开洞填充墙框架减缓了结构的强度退化和刚度退化速度;烧结页岩空心砖砌体填充墙参与了结构的滞回耗能,且表现出较好的耗能能力,同等位移幅值下,填充墙试件的耗能能力均大于纯框架试件。

In order to investigate the influence of shale fire hollow brick as infilled masonry on seismic performance of reinforcement concrete(RC)frame building,cyclic loading tests were carried out on three 1/2-scale,one-story,one-bay RCframes with infilled masonry.By comparing the damage characteristics,hysteretic characteristics,skeleton curve,strength degradation,stiffness degradation and energy dissipation capacity of specimens,we studied the seismic performance of bare frame,full infilled frame and infilled frame with opening.The results show that,the infilled wall using shale fire hollow brick enhances the bearing capacity and stiffness of RC frames,which is beneficial to the deformation control of the structure under the action of minor earthquake and improves the ability of resisting lateral loads.Compared with full filled frame,the opening helps to slow down the rate of strength degradation and stiffness degradation.Masonry infilled wall with shale fired hollow brick participates in the hysteretic energy dissipation of the building,and shows a good energy dissipation capacity,so that the energy dissipation capacity of the specimens with infilled wall is greater than that of the bare frame specimen in each cycle.