环筋约束下超短混凝土试件的方形局部受压试验  

Local compression experiment on concrete member with confinement of circular steel bars

作　　者：蔡健[1,2] 汤序霖[1] 陈庆军[1,2,3] 何岸[1] 梁超群[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]亚热带建筑科学国家重点实验室,广州510641 [3]澳大利亚新南威尔斯大学土木与环境学院CIES研究中心

出　　处：《建筑结构》2014年第5期1-5,11,共6页Building Structure

基　　金：华南理工大学亚热带建筑科学国家重点实验室自主研究课题项目(2013ZC19);中央高校基本科研业务费专项资金资助(2014ZZ0026);广东省自然科学基金资助项目(9451064101002910);国家留学基金

摘　　要：为研究节点区柱钢管全断开式方钢管混凝土柱-混凝土梁节点的力学性能,对3个节点核心区试件进行轴压试验。研究节点核心区相对高度(环梁高度与环梁宽度的比值)对试件破坏形态、承载力的影响。试验结果表明,试件均具有较大的极限承载力与良好的延性,方钢管混凝土结构中采用全断开节点形式的思路可行;相对高度不同的试件破坏形态存在明显差异,随着试件相对高度的增大其极限承载力明显下降,但相对高度较大的试件具有更好的抗裂性能。钢管全断开式圆钢管混凝土柱节点的轴压极限承载力计算公式同样适用于钢管全断开式方钢管混凝土柱节点。For study on mechanical property of concrete-filled steel square tubular column-concrete beam joint with disconnection column tube at joint zone, local compression experiments of 3 specimens were carried out. The effects of the joint relative height （ height-width ratio of ring beam） on the failure modes and bearing capacity were discussed. The result shows that the specimens have higher bearing capacity and ductility, so this type of joint can be applied to the concrete filled steel square tube structure. The failure modes show significant differences among specimens of different relative heights. The bearing capacity of specimen decreases with the increase of relative height, but specimens of higher relative height show better anti-cracking capacity. The bearing capacity formula of concrete-filled steel circular tubular column joint with disconnection column tube at joint zone is also applicable ＂to concrete-filled steel square tubular column joint with disconnection column tube at joint zone.

关 键 词：钢管混凝土 柱-梁节点 不贯通钢管 轴心受压 

分 类 号：TU398[建筑科学—结构工程]