建筑结构学报2024，Vol.45Issue(10)：107-119,13.DOI:10.14006/j.jzjgxb.2023.0228
预埋型钢的钢筋混凝土柱-钢梁组合节点抗震性能试验研究及设计方法
Experimental study on seismic behavior and design method of reinforced concrete column-steel beam composite joints with embedded profile steel
摘要
Abstract
To improve the force transmission efficiency and seismic performance of reinforced concrete column-steel beam(RCS)composite joint,a kind of RCS composite joint with embedded profile steel was proposed.Four specimens were designed and manufactured.Through the pseudo static test,the influence of the extension length and steel ratio of embedded profile steel on the failure mode and seismic performance of the specimen was studied,and the design method of the joint was proposed.The results show that the failure modes of the specimens can be classified into failure of the concrete column at the profile steel cutoff,concrete column end failure,and simultaneous failure at the profile steel cutoff and the concrete column end(boundary failure).Among them,the specimens with concrete column end failure have higher bearing capacity and energy dissipation capacity.When the extension length of the embedded profile steel exceeds the boundary length,the specimen undergoes concrete column end failure,which can realize the effective force transmission of embedded profile steel.The increase of the steel ratio of the embedded profile steel can improve the seismic capacity of concrete column end failure specimens,but the extension length of the embedded profile steel should also be increased.The flexural bearing capacity of the concrete column at the embedded profile steel cutoff is 68％of that of the ordinary reinforced concrete column,and the flexural bearing capacity of the concrete column end is 86％of that of the steel reinforced concrete column.Finally,the design method of the reasonable extension length of the embedded profile steel was proposed,and the design suggestions for extension length coefficient,steel ratio of embedded profile steel and joint were given.关键词
RCS组合节点/预埋型钢/拟静力试验/抗震性能/设计方法Key words
RCS composite joint/embedded profile steel/pseudo-static test/seismic behavior/design method分类
建筑与水利引用本文复制引用
门进杰,郭梦强,范栋鑫,王鸿霄,兰涛..预埋型钢的钢筋混凝土柱-钢梁组合节点抗震性能试验研究及设计方法[J].建筑结构学报,2024,45(10):107-119,13.基金项目
国家重点研发计划政府间国际科技创新合作重点专项项目(2019YFE0112900),国家自然科学基金项目(52178160,51878542). （2019YFE0112900）
