套筒灌浆搭接连接的开洞剪力墙抗震试验  

Test on Seismic Behavior of Opening Shear Wall Spliced by Grouted Sleeve Lapping Connector

作　　者：余琼[1] 唐子鸣 张亮 郭霖 范宝秀 张志 陈振海 YU Qiong;TANG Ziming;ZHANG Liang;GUO Lin;FAN Baoxiu;ZHANG Zhi;CHEN Zhenhai(College of Civil Engineering,Tongji University,Shanghai 200092,China;Shanxi Construction Engineering Group Co.,Ltd.,Taiyuan 030006,China;Shanxi Erjian Group Co.,Ltd.,Taiyuan 030013,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]山西建筑工程集团有限公司,山西太原030006 [3]山西二建集团有限公司,山西太原030013

出　　处：《湖南大学学报（自然科学版）》2024年第9期1-14,共14页Journal of Hunan University:Natural Sciences

基　　金：上海市科技计划资助项目(21ZR1468300)。

摘　　要：剪力墙是高层建筑结构重要的抗侧力构件.为研究纵筋套筒灌浆搭接接头(简称APC接头)连接的全预制开洞墙可靠性,进行了1片现浇墙和2片竖向钢筋采用Ⅰ型、Ⅱ型APC接头连接的预制不等肢开洞墙拟静力试验,研究了试件的破坏形式、滞回性能、特征荷载、变形、钢筋和套筒应变及结合面抗剪性能等.结果表明:各试件的裂缝发展情况基本相同,墙肢和连梁发生弯剪破坏;现浇墙破坏起始于两墙肢根部,而预制墙套筒上方混凝土先被压碎,各试件墙肢外侧破坏情况较内侧严重;套筒顶部截面为破坏时薄弱面,套筒上方钢筋易压屈,构件设计时箍筋应加强;预制墙的开裂荷载、墙肢屈服荷载和刚度略高于现浇墙,峰值荷载和强度退化系数与现浇墙相当,预制墙延性略差;同一加载级下,各试件耗能能力相当;预制墙灌浆结合面表现出较好的抗剪性能,两种接头在预制墙中均能有效传递钢筋应力.采用APC接头连接的预制开洞剪力墙基本实现“等同现浇”.Shear walls are important lateral force-resistant components of high-rise building structures.To study the reliability of precast walls with openings connected by grouted sleeve lapping connectors named APC connectors(all vertical members precasted in concrete structures),pseudo-static tests were carried out on a castin-place wall and two precast unequal-limb walls with an opening in which vertical reinforcements were spliced by type-Ⅰand type-ⅡAPC connectors.The failure modes,hysteretic behaviors,characteristic loads,deformations,strains of reinforcement and sleeve of the specimens,as well as the shear properties of bonded surfaces,were studied.The results showed that the crack development process of all specimens was basically the same,and the bending shear failure occurred in the wall limb and the coupling beam.The damage to the cast-in-place wall began at the bottom of the wall limb,while the concrete above the sleeve of the precast wall was crushed first.In addition,the failure of the outside of the wall limb of each specimen was more serious than the inside.The section at the top of the sleeve was the weak surface,and vertical reinforcements above the sleeve were prone to buckling in the failure stage,which should be strengthened during the design of the stirrup of the component.The crack load,yield load,and stiffness of precast walls were slightly higher than those of cast-in-place walls,and the peak load and strength degradation coefficient were similar,but the ductility was slightly worse.At the same loading stage,the energy dissipation capacity of all specimens was similar.The grouting joint surface of the precast walls showed reliable shear resistance,and both APC connectors can effectively transfer reinforcement stress in the precast walls.The precast shear wall with an opening spliced by APC connectors can achieve the seismic performance equivalent to the cast-inplace wall.

关 键 词：预制混凝土 剪力墙 APC接头 抗震性能 拟静力试验 

分 类 号：TU375[建筑科学—结构工程]