装配式围墙柱-基础节点拟静力试验研究
Quasi-static Test Study on Prefabricated Wall Column-foundation Joint
刘兴 1楼铁炯 1谭冬梅 1魏文晖1
作者信息
- 1. 武汉理工大学土木工程与建筑学院,武汉 430070
- 折叠
摘要
提出了一种新型装配式围墙柱-基础节点,该节点采用灌浆套筒连接预制柱与预制基础的钢筋,并在二者混凝土接缝面采用企口的连接方式增强截面抗剪性能.为探究该装配式节点在实际工程中能否替代现浇节点,对装配节点和相应现浇节点的足尺模型试件进行拟静力试验.对比分析该装配式节点与现浇节点的试验现象和试验结果,包括破坏形态、滞回曲线、骨架曲线、承载能力、延性系数、等效粘滞阻尼系数以及刚度退化曲线.结果表明:该装配式节点破坏特征为套筒上部混凝土压溃、钢筋屈曲;延性系数为3.3,低于现浇节点,但其承载力高于现浇节点5％,基本实现了"等同现浇".
Abstract
A novel assembled wall column-foundation joint was proposed.The joint utilized grouting sleeves to connect the rein-forcing bars of precast columns and precast foundations.A dovetail connection method was employed at the concrete joint interface to enhance the shear resistance of the cross-section.Quasi-static tests were carried out on the full-scale models of prefabricated joints and cast-in-place joints,and comparative analysis was conducted on the experimental phenomena and results between the two joint models,including failure modes,hysteresis curves,skeleton curves,load-carrying capacity,ductility coefficients,equivalent viscous damping coefficients,and stiffness degradation curves.The study reveals that failure of the prefabricated joint is primarily due to upper sleeve concrete crushing and reinforcement bar buckling.It possesses a load-bearing capacity that surpasses cast-in-place joints by 4％.With a ductility coefficient of 3.3,it falls below that of cast-in-place counterparts,meeting the requirements specified for"equivalent cast-in-place".
关键词
装配式围墙/柱-基础节点/足尺模型/拟静力试验Key words
fabricated wall/column-foundation joint/full-scale model/quasi-static test引用本文复制引用
出版年
2024
NETL
NSTL
万方数据