(1 广东省建科建筑设计院有限公司, 广州 510010;2 广东工业大学土木与交通工程学院, 广州 510006)

摘要: 为解决装配式混凝土框架结构梁柱节点核心区钢筋拥塞的问题,设计了两种梁柱节点构造,一种为核心区与左右两梁一体预制,下柱伸出钢筋穿过其中预留孔道与上柱连接;一种为核心区与下柱一体预制,两段预制梁与其后浇连接,分别制作了两个足尺模型试件进行低周反复荷载试验,考察两个试件的破坏形态、承载力、延性性能、刚度退化、耗能能力等. 试验结果表明:核心区与梁一体预制的节点的抗震性能可以等同于现浇节点;使用矩形截面预制梁对梁柱节点抗震性能的影响接近或优于凹口截面预制梁;核心区与下柱一体预制的节点,节点伸出的梁底纵筋采用大直径钢筋,可提高节点的承载力和刚度,同时其延性和耗能能力降低,这种构造未能实现强连接.

关键词: 装配式混凝土框架结构; 梁柱节点; 灌浆套筒连接; 抗震性能; 强连接

中图分类号:TU375. 4 文献标志码:A 文章编号:1002⁃848X(2022)08⁃0053⁃07

DOI:10. 19701 / j.jzjg.LS210028

Experimental study on seismic performance of beam⁃column joints of fabricated concrete frame structure

XU Qigong1, 2, CHEN Wendong2, LI Na1

(1 Jianke Architectural Design Institute of Guangdong Province Co., Ltd., Guangzhou 510010, China;2 School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China)

Abstract: In order to solve the problem of steel congestion in the core area of the beam⁃column joint of the fabricatedconcrete frame structure, two beam⁃column joint were designed. One is that the core area and the left and right beams areprefabricated as a whole, and the protruding reinforcement of the lower column is connected with the upper columnthrough the reserved channel. The other is that the core area and the lower column are prefabricated as a whole, and thetwo precast beams are connected with the post pouring. Two full⁃scale model specimens were made for low cyclic loadingtest to investigate the failure mode, bearing capacity, ductility propertie, stiffness degradation and energy dissipationcapacity of two specimens. The test results show that the seismic performance of the joint whose core area and the beamare prefabricated as a whole can be equivalent to that of the cast⁃in⁃place joint. The influence of precast beam withrectangular section on the seismic performance of beam⁃column joints is close to or better than that of precast beam withnotched section. For the joint whose core area and the lower column are prefabricated as a whole, the protrudingreinforcement at the bottom of the beam is large⁃diameter reinforcement, which can improve the bearing capacity andstiffness of the joint, and at the same time reduce its ductility and energy dissipation capacity. This configuration fails toachieve strong connections.

Keywords:fabricated concrete frame structure; beam⁃column joint; sleeve grouting connection; seismic performance;strong connection

第一作者:徐其功,博士,教授级高级工程师,主要从事装配式混凝土结构、铝合金房屋、铝合金模板、铝合金天桥的研究,Email:xuqigong2005@ sina.com.

[引用本文] 徐其功,陈文东,李娜. 装配式混凝土框架结构梁柱节点抗震性能试验研究[ J]. 建筑结构,2022,52(8):53⁃59. XU Qigong,CHEN Wendong,LI Na. Experimental study on seismic performance of beam⁃column joints offabricated concrete frame structure[J]. Building Structure,2022,52(8):53⁃59.