高强螺栓-齿槽-灌浆套筒连接装配式L型梁-柱边节点抗震性能试验研究  

Experimental Research on Seismic Performance of Prefabricated L-shaped Beam-Column Edge Joint With High Strength Bolt-Cogging-Grout Sleeve Composite Connections

作　　者：丁颖楠 许维炳[1] 王瑾[1] 闫晓宇[3] 陈彦江[1] 赵卓[1] DING Yingnan;XU Weibing;WANG Jin;YAN Xiaoyu;CHEN Yanjiang;ZHAO Zhuo(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;China Architecture Design and Research Group,Beijing 100044,China;School of Engineering,National Open University,Beijing 100039,China)

机构地区：[1]北京工业大学城市建设学部,北京100124 [2]中国建筑设计研究院有限公司,北京100044 [3]国家开放大学理工教学部,北京100039

出　　处：《北京工业大学学报》2022年第8期830-841,共12页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51908015,51978021);国家重点研发计划资助项目(2017YFC1500604);北京工业大学基础研究基金资助项目(004000546318524)。

摘　　要：为解决建筑结构顶层L型梁-柱边节点(简称L型节点)易发生剪切破坏的问题,提出一种高强螺栓-齿槽-灌浆套筒装配式组合节点(H-C-S节点),分别设计制作将H-C-S节点设置于梁端塑性铰区外、塑性铰区内的装配式L型节点试件LS1、LS2,塑性铰区外设置齿槽-灌浆套筒装配式组合节点(C-S)的装配式L型节点试件CJ1.开展了各试件的低周往复加载试验,分别从破坏形式、荷载-位移关系、耗能能力等方面对比分析了各试件的抗震性能.结果表明:与C-S节点相比,相同设置位置的H-C-S节点可以延缓装配式L型节点的接缝张合与刚度退化进程,提升装配式L型节点的峰值荷载与耗能能力,改善梁端纵筋与混凝土间的黏结性能;将H-C-S节点设置于梁端塑性铰区内会导致梁端塑性铰区上移,造成装配式L型节点的接缝与核心区出现较为严重的损坏,并加剧装配式L型节点的接缝张合与刚度退化进程,降低装配式L型节点的峰值荷载与耗能能力.将H-C-S节点设置于梁端塑性铰区外能够更好地实现"强节点、弱构件"的设计原则,并在最大程度上保证装配式结构的整体性.H-C-S节点可用于同类装配式L型梁-柱节点中.To avoid shear failure of top floor L-shaped beam-column edge joints(L-shaped joints),a high strength bolt(HSB)-cogging-grout sleeve composite joint(H-C-S joint)was proposed in this paper.First,two prefabricated L-shaped joint specimens with H-C-S joints(LS1,LS2)and one prefabricated L-shaped joint specimen with cogging-grout sleeve composite joint(C-S joint,CJ1)were designed and manufactured.The H-C-S joint of the LS1 was outside the plastic hinge area of the beam(the outside arrangement),while the H-C-S joint of the LS2 was inside the plastic hinge area of the beam(the inside arrangement).The arrangement of the C-S joint of the CJ1 was also the inside arrangement.Second,pseudo-static tests of these specimens were carried out.The seismic performance of prefabricated L-shaped joints was compared and analyzed through their failure modes,load-displacement relationships,and energy consumption capacities.Results show that compared with the C-S joint,the similar arranged H-C-S joints can delay the seam cracking and stiffness degradation process.The H-C-S joint can also increase the peak load,energy consumption capacity of prefabricated L-shaped joints,as well as improve the bonding performance between rebar and concrete.The outside arrangement of H-C-S joints causes the beam plastic hinge area moving up,and lead serious damage to the joint seam and core area.Moreover,the outside arrangement of H-C-S joints will aggravate joint seam cracking and stiffness degradation,as well as reduce the peak load and energy consumption capacity of prefabricated L-shaped joints.The outside arrangement of the H-C-S joint can better realize the design principle of"strong connection-weak connected member"and ensure the integrity of prefabricated structures to some extents.Thus,H-C-S joints can be applied to prefabricated L-shaped beam-column joints.

关 键 词：装配式 高强螺栓 顶层梁-柱边节点 抗震性能 塑性铰区 试验研究 

分 类 号：TU375.1[建筑科学—结构工程] TU973