摘要
为研究现浇混凝土填充墙与主体结构间两种不同柔性连接构造以及采取弱化措施的填充墙对主体结构抗震性能的影响,设计并制作了两个带有混凝土填充墙的剪力墙试件(W-2、W-3)以及一个作为对比的不含填充墙试件(W-1),对其进行了拟静力试验。试验结果表明:柔性连接处采用PVC拉缝完全断开方式的试件W-2中,一层连梁和上方窗台墙可以形成双连梁的工作模式,主体结构的破坏模式与试件W-1类似,仍为梁铰机制;采用挤塑板条部分断开方式的试件W-3中,一层连梁和上方窗台墙作为整体连梁共同工作并发生剪切破坏,破坏模式与试件W-1有较大差别;截面厚度和配筋均较小的混凝土填充墙,试验过程中较早发生破坏并逐渐退出工作;试件W-2一层窗间墙底部与基础间连接处可以产生相对水平滑移,而试件W-3则未发生明显的相对滑移变形;试件W-2和W-3峰值承载力分别较试件W-1提高了约52.37%和79.99%;试件W-2的位移延性系数与试件W-1相当,而试件W-3的位移延性系数较试件W-1降低了约12.4%。
To investigate the impact of two distinct flexural connection methods between cast-in-situ concrete infill walls and the main structure,as well as the effect of weakened infill walls on the seismic performance of structures,two shear wall specimens with concrete infill walls and one counterpart specimen without infill walls were designed and fabricated for quasi-static test.The experimental results indicate that in specimen W-2 with a flexible connection using fully disconnected PVC joints,the first-floor coupling beam and the upper window sill wall can form a double beam working mode,and the failure mode of the main structure is similar to that of specimen W-1,which is a beam-hinge mechanism.In specimen W-3 with partially disconnected extruded polystyrene board strips,the first-floor coupling beam and the upper window sill wall work together as an integral beam and underwent shear failure,showing significant differences in failure mode compared to specimen W-1.Concrete infill walls with smaller section thickness and reinforcement experience early failure during the test and gradually withdraw from working.Specimen W-2 exhibit relative horizontal sliding at the connection between the bottom of the first-floor window walls and the foundation,while there is no significant relative sliding deformation observed in specimen W-3.The peak load-carrying capacities of specimens W-2 and W-3 are increased by approximately 52.37% and 79.99% respectively compared to specimen W-1.The displacement ductility coefficient of specimen W-2 is equivalent to that of specimen W-1,while the displacement ductility coefficient of specimen W-3 decrease by approximately 12.4% compared to specimen W-1.
作者
沈毅
程驭
种迅
方成
蒋庆
苏文基
宋鹏程
SHEN Yi;CHENG Yu;CHONG Xun;FANG Cheng;JIANG Qing;SU Wenji;SONG Pengcheng(Anhui High-way Real Estate Group Co.,Ltd.,Hefei 230088,China;College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering and Materials,Hefei University of Technology,Hefei 230009,China)
出处
《建筑结构》
北大核心
2026年第3期109-116,共8页
Building Structure
基金
国家自然科学基金资助项目(52178472)
安徽省重点研究与开发项目(202104a07020022)。
关键词
全现浇混凝土外墙
抗震性能
拟静力试验
柔性连接
填充墙
fully cast-in-situ concrete exterior wall
seismic performance
quasi-static test
flexural connection
infill wall
