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。
In order to solve the problem of steel congestion in the core area of the beam-column joint of the fabricated concrete frame structure,two beam-column joint were designed.One is that the core area and the left and right beams are prefabricated as a whole,and the protruding reinforcement of the lower column is connected with the upper column through the reserved channel.The other is that the core area and the lower column are prefabricated as a whole,and the two precast beams are connected with the post pouring.Two full-scale model specimens were made for low cyclic loading test to investigate the failure mode,bearing capacity,ductility propertie,stiffness degradation and energy dissipation capacity of two specimens.The test results show that the seismic performance of the joint whose core area and the beam are prefabricated as a whole can be equivalent to that of the cast-in-place joint.The influence of precast beam with rectangular section on the seismic performance of beam-column joints is close to or better than that of precast beam with notched section.For the joint whose core area and the lower column are prefabricated as a whole,the protruding reinforcement at the bottom of the beam is large-diameter reinforcement,which can improve the bearing capacity and stiffness of the joint,and at the same time reduce its ductility and energy dissipation capacity.This configuration fails to achieve strong connections.
作者
徐其功
陈文东
李娜
XU Qigong;CHEN Wendong;LI Na(Jianke Architectural Design Institute of Guangdong Province Co.,Ltd.,Guangzhou 510010,China;School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)
出处
《建筑结构》
CSCD
北大核心
2022年第8期53-59,共7页
Building Structure
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
fabricated concrete frame structure
beam-column joint
sleeve grouting connection
seismic performance
strong connection
