多螺旋箍筋增强装配式混凝土梁柱节点抗震性能试验研究  

Experimental studies on seismic behaviour of precast concrete beam-column joints reinforced with multi spiral stirrups

作　　者：裘煜 邹小舟 罗运海 李丽娟[2] 武念铎 熊哲[2] 谢龙盼 QIU Yu;ZOU Xiaozhou;LUO Yunhai;LI Lijuan;WU Nianduo;XIONG Zhe;XIE Longpan(Guangdong Xiangshun Construction Group Co.,Ltd,Yunfu,527400,China;School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,510006,China;China Construction Eighth Engineering Division Corp.,Ltd,Shanghai,200122,China)

机构地区：[1]广东翔顺建设集团有限公司,广东云浮527400 [2]广东工业大学土木与交通工程学院,广东广州510006 [3]中国建筑第八工程局有限公司,上海200122

出　　处：《西安建筑科技大学学报（自然科学版）》2023年第5期687-696,共10页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(12032009,12002091);广东省企业科技特派员专项(GDKTP2021004500)。

摘　　要：和普通复合箍筋相比,多螺旋箍筋对混凝土不仅具有更加优异的约束效果,同时还能节约钢材.提出在装配式混凝土结构中采用多螺旋箍筋进行加强.考虑节点约束强弱、节点位置、施工方式以及箍筋形式的影响,共设计2组足尺混凝土梁柱节点试件.通过低周往复荷载试验,对节点的破坏模式、滞回曲线、骨架曲线、延性以及强度退化等抗震指标展开讨论.结果表明强节点试件在梁端发生弯曲破坏,弱节点试件在节点发生剪切破坏.这些节点试件中,装配式中间节点破坏位移较小,滞回曲线更加饱满,延性系数更高,承载力更好.装配式边节点的破坏位移、延性系数、强度、刚度优于现浇节点.此外,多螺旋箍筋增强装配式梁柱节点承载力试验值均大于理论值,符合国家标准要求,并具备较好的安全冗余.Compared with ordinary composite stirrups,multi spiral stirrups not only have better restraint effect on concrete,but also save steel,so it is proposed to use multi-spiral stirrup to strengthen precast concrete structures.Considering the influence of joint constraint strength,joint position,construction method and stirrup form,two sets of full-scale concrete beam-column joint specimens are designed.The failure mode,hysteretic curve,skeleton curve,ductility and strength degradation of the joint are discussed through low cycle reciprocating load test.It is found that the bending failure of the strong joint specimen occurs at the beam end,and the shear failure of the weak joint specimen occurs at the joint zone.Among these joint specimens,the failure displacement of the precast intermediate joints is smaller,the hysteretic curve is fuller,the ductility coefficient is higher,and the bearing capacity is better.The failure displacement,ductility coefficient,strength and stiffness of the precast side joints are better than those of cast-in-situ joints.In addition,the tested bearing capacity of the precast beam-column joints reinforced with multi spiral stirrups are greater than their theoretical bearing capacity,implying that the innovative precast beam-column joints can meet the requirements of the national standards and have good safety redundancy.

关 键 词：多螺旋箍筋 装配式混凝土 梁柱节点 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程]