方形截面不锈钢管混凝土短柱轴压承载性能试验研究  

Experimental study on bearing behavior of concrete-filled square stainless steel tubular stub columns under axial compression

作　　者：代鹏 杨璐 王洁[3] 冈毅 杨树欣 DAI Peng;YANG Lu;WANG Jie;GANG Yi;YANG Shuxin(The Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Centre of High-Kise and Large-Span Prestressed Steel Structures,Beijing University of Technology,Beijing 100124,China;Department of Architecture and Civil Engineering,University of Bath,Bath BA27AY,UK;Beijing NO.2 Construction Engineering Co.,Ltd.,Beijing 100141,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124 [3]巴斯大学建筑与土木工程系,英格兰巴斯BA27AY [4]北京市第二建筑工程有限责任公司,北京100141

出　　处：《建筑结构学报》2021年第6期182-189,共8页Journal of Building Structures

基　　金：北京市优秀人才培养项目(拔尖自然科学)(2017000026833ZK26);国家自然科学基金创新研究群体项目(51421005)。

摘　　要：为研究不锈钢管混凝土(CFSST)短柱的轴压承载性能,对9根奥氏体型S30408和9根双相型S22053不锈钢管混凝土短柱以及6根对应相同尺寸的不锈钢空钢管进行了轴压试验,试验测得了荷载-位移曲线、荷载-应变曲线以及短柱的破坏情况等。结果表明:CFSST短柱均呈腰鼓型破坏,不锈钢管呈现双面鼓曲、双面内凹的局部失稳破坏模态;短柱轴压承载力随着不锈钢管厚度、混凝土强度的增加而增大。将轴压承载力试验结果与分别采用欧洲规范BS EN 1994-1-1、美国钢结构设计规范ANSI/AISC 360-10、日本规范AIJ-CFT 1997、GB 50936—2014《钢管混凝土结构技术规范》和DBJ 13-51—2003《钢管混凝土结构技术规程》中钢管混凝土短柱轴压承载力计算式得到的计算结果进行对比表明,采用欧洲规范BS EN 1994-1-1得到的计算结果最为接近试验结果。In this paper, the compressive behavior of concrete-filled stainless steel tubular(CFSST) stub columns has been investigated through an experimental program. A total of 24 specimens, including nine austenitic CFSST, nine duplex CFSST stub columns and six stainless steel tubes of corresponding cross-section size, were tested under axial compression. Load-axial displacement curves, load-strain curves and failure modes were measured during the tests. The results show that all CFSST stub columns fail in the form of waist drum failure mode, and the stainless steel tubes fail in local buckling mode with two sides of steel tube bulging and two sides being concave. The bearing capacity of specimens under axial compression increases with the increase of the thickness of stainless steel tube and the strength of concrete. The test results are compared with the predicted load values by codes BS EN 1994-1-1, ANSI/AISC 360-10, AIJ-CFT 1997, GB 50936—2014 and DBJ 13-51—2003, indicating that the predicted load values by BS EN 1994-1-1 are closest to the test results.

关 键 词：不锈钢管混凝土短柱 轴压试验 破坏模态 承载力 

分 类 号：TU398.902[建筑科学—结构工程] TU317.1