钢管混凝土缺陷构件承载能力试验研究及数值分析计算  

EXPERIMENTAL RESEARCH AND NUMERICAL ANALYSIS OF THE BEARING CAPACITY OF CONCRETE-FILLED STEEL TUBE(CFST)WITH DEFECTS

作　　者：郝兆峰 张戎令[2,3] 马丽娜 Alan Kwan[3] 宁贵霞 李志扬[4] HAO Zhaofeng;ZHANG Rongling;MA Lina;ALAN Kwan;NING Guixia;LI Zhiyang(School of Civil Engineering,Lanzhou Jiangtong University,Lanzhou 730070,China;National and Provincial Joint Engineering Laboratory of Road&Bridge Disaster Prevention and Control,Lanzhou Jiaotong University,Lanzhou 730070,China;Cardiff School of Engineering,Cardiff University,Cardiff CF243 AA,UK;Traffic Survey and Design Institute of Gansu Henglu Co.,Ltd.,Lanzhou 730070,China)

机构地区：[1]兰州交通大学土木工程学院,兰州730070 [2]兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室,兰州730070 [3]卡迪夫大学工程学院,英国卡迪夫CF243 AA [4]甘肃省恒路交通勘察设计院有限公司,兰州730070

出　　处：《工业建筑》2020年第8期138-144,53,共8页Industrial Construction

基　　金：国家自然科学基金项目(51768033);青年人才托举工程,飞天学者特聘计划,长江学者和创新团队发展计划滚动支持(IRT_15R29);甘肃省高校协同创新科技团队支持计划资助(2017C-08);陇原青年创新人才(团队)项目;甘肃省教育厅高等学校科研项目(2018B-054)

摘　　要：为研究钢管混凝土缺陷构件的受压承载性能,进行了9组钢管混凝土缺陷构件的承载力试验,得到了钢管混凝土缺陷构件轴向变形随荷载强度的变化曲线。研究结果表明:缺陷对钢管混凝土构件的受压承载能力影响较大,相对于无缺陷构件,缺陷构件承载力损失程度最小达到14%,最大可达59%;缺陷位置相同时,钢管混凝土构件承载力损失值与缺陷率成正比;边缘缺陷引起的承载力损失值大于中心缺陷。通过有限元软件建立了钢管混凝土缺陷构件的仿真模型,扩展了结构类型,验证了试验结果的准确性。In order to study the compressive bearing capacity of concrete-filled steel tube(CFST)members with defects,the bearing capacity tests of 9 groups of CFST defective members were carried out,and the change curve of axial deformation of CFST defective members with load strength was obtained.The results showed that the defect had a great influence on the compressive bearing capacity of concrete-filled steel tube specimens,compared with nondefective components,the bearing capacity loss of defective components was as low as 14%and as high as 59%.With the same defect location,the bearing capacity loss of concrete-filled steel tube members was proportional to the defect ratio.The loss of bearing capacity caused by edge defect was greater than that caused by central defect.Through the finite element software,the simulation model of concrete-filled steel tube(CFST)was established,the structure type was expanded,and the accuracy of the test results was verified.

关 键 词：钢管混凝土 缺陷 受压承载力 有限元 

分 类 号：TU398.9[建筑科学—结构工程]