型钢混凝土板柱节点抗冲切性能试验研究  

Experimental Study on Punching Shear Behavior of Steel Reinforced Concrete Slab-column Joints

作　　者：周理 黄勇 陈波 尚鋆 张辰韵 ZHOU Li;HUANG Yong;CHEN Bo;SHANG Jun;ZHANG Chenyun(College of Architecture and Urban planning,Guizhou University,Guiyang 550003,China;Guizhou Zhongjian Spatial Structure Technology Co.,Ltd,Guiyang 550003,China;College of Civil Engineering,Guizhou University,Guiyang 550018,China)

机构地区：[1]贵州大学建筑与城市规划学院,贵州贵阳550003 [2]贵州中建空间工程科技有限公司,贵州贵阳550003 [3]贵州大学土木工程学院,贵州贵阳550018

出　　处：《应用基础与工程科学学报》2022年第3期618-632,共15页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51368009);贵州省基础研究计划(黔科合基础[2020]1Y417);贵州大学引进人才科研基金资助项目(2019(08)号)。

摘　　要：为研究型钢混凝土板柱节点的抗冲切性能,考虑型钢布钢形式、板纵筋配筋率、混凝土强度、板厚及型钢含钢率等参数变化,设计制作了12个1/5缩尺试件.通过竖向单调加载试验,研究试件的破坏过程及破坏模式,分析荷载-挠度曲线、极限抗冲切承载力、延性系数及耗能能力.结果表明,型钢混凝土板柱节点具有明显的延性破坏特征,其极限抗冲切承载力、延性性能及耗能能力普遍优于钢筋混凝土试件.并且随着型钢布置数量、板纵筋配钢率、混凝土强度、板厚及型钢含钢率的增加,节点的抗冲切承载力均能得到一定程度的提升.此外,借鉴现有规范推导出了型钢混凝土板柱节点的极限抗冲切承载力计算公式,计算值与试验值吻合良好.To study the punching shear behavior of steel reinforced concrete(SRC)slab-column joints,a total of 121/5 scale test specimens were designed and manufactured,the research parameters are the steel distribution type,the ratio of plate longitudinal bars,the concrete strength grade,the plate thickness and the ratio of I-shaped steels.All specimens were tested under vertical loads,the failure process and failure mode of specimens were discussed and the vertical load-deflection curve,ultimate bearing capacity,ductility and energy dissipation of each specimen were analyzed in detail.The results show that SRC slab-column joints have obvious ductile failure characteristics,and the ultimate punching shear capacity,ductility and energy dissipation capacity of SRC slab-column joints are generally better than those of RC specimens.Further,the ultimate punching shear capacity of the composite joints can be improved to different degrees with the increase of the quantity of shaped steel,ratio of plate longitudinal bars,concrete strength,plate thickness and ratio of shaped steels.In addition,a calculation formula for the ultimate punching shear capacity of SRC slab-column joints was derived based on the existing codes.The calculation results which accord to the formula in this article were in good agreement with the experimental results.

关 键 词：型钢混凝土 板柱节点 冲切性能 性能分析 承载力计算 

分 类 号：TU398.9[建筑科学—结构工程]