钢框架内嵌角部圆弧缺口AAC砌体填充墙滞回性能研究  

Study on Hysteretic Behavior of AAC Masonry Infill Wall with Circular-arc Openings at Corners Embedded in Steel Frame

作　　者：郁有升[1] 郭亚楠 YU You-sheng;GUO Ya-nan(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,Shandong,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《建筑科学与工程学报》2022年第1期77-86,共10页Journal of Architecture and Civil Engineering

基　　金：山东省自然科学基金项目(ZR2017MEE068)。

摘　　要：基于在填充墙的角部设置缺口可弱化拉(压)力带的原理,设计了一系列钢框架内嵌角部圆弧缺口填充墙试件,包括1个纯钢框架、1个无缺口蒸压轻质加气混凝土(AAC)砌体填充墙钢框架和9个带不同尺寸圆弧缺口的AAC砌体填充墙钢框架,采用ABAQUS软件对各试件进行了有限元模拟分析。研究了填充墙角部设置的圆弧缺口构造对钢框架滞回性能、承载能力、延性、刚度退化、强度退化及耗能能力的影响。结果表明:填充墙角部设置的圆弧缺口构造可以削弱AAC砌体填充墙对钢框架承载能力的贡献,有效延缓墙体破坏,降低墙体对钢框架的附加刚度,延缓AAC砌体填充墙钢框架的刚度退化速率;填充墙角部设置的圆弧缺口构造还能改变AAC砌体填充墙的破坏模式;根据有限元分析结果,建议圆弧缺口的弧长为πl/2,圆弧半径l为AAC砌体填充墙高度的1/10~1/7。Based on the principle that setting openings at the corners of the infill wall could weaken the tension(compression) band, a series of specimens of infill wall with circular-arc openings at the corners embedded in steel frame were designed, including one pure steel frame, one autoclaved lightweight aerated concrete(AAC) masonry infilled steel frame without opening, nine AAC masonry infilled steel frame with different sizes circular-arc openings. The finite element analysis of each specimen was carried out by ABAQUS software. The influence of circular-arc openings at the corners of the infill wall on the hysteretic behavior, load-bearing capacity, ductility, stiffness degradation, strength degradation and energy dissipation capacity of steel frames were studied. The results show that the circular-arc openings at the corners of the infill wall can weaken the contribution of AAC masonry infill wall to the load-bearing capacity of steel frame, effectively delay the failure of the infill wall, reduce the additional stiffness of the infill wall for the steel frame structures, and delay the stiffness degradation rate of AAC masonry infill wall embedded in steel frame.The circular-arc openings can also change the failure mode of the AAC masonry infill wall. According to the results of finite element analysis, it is suggested that the arc length of circular-arc openings is πl/2 and the radius l is 1/10-1/7 of the height of AAC masonry infill wall.

关 键 词：蒸压轻质加气混凝土 填充墙 钢框架 相互作用 角部圆弧缺口 滞回性能 

分 类 号：TU398[建筑科学—结构工程]