端板型薄壁钢管混凝土框架连接节点的滞回性能研究  

Hysteretic Behavior of the Endplate Joints for Concrete-Filled Thin-Walled Steel Tubular Frames

作　　者：陈馨怡 王静峰[2] 郭水平 CHEN Xinyi;WANG Jingfeng;GUO Shuiping(School of Civil Engineering,Anhui Vocational and Technical College,Hefei 230011,China;College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;China Wuzhou Engineering Group Co.,Ltd.,Beijing 100053,China)

机构地区：[1]安徽职业技术学院建筑工程学院,合肥230011 [2]合肥工业大学土木与水利工程学院,合肥230009 [3]中国五洲工程设计集团有限公司,北京100053

出　　处：《建筑钢结构进展》2021年第7期97-104,共8页Progress in Steel Building Structures

基　　金：国家自然科学基金(50808062);安徽省自然科学研究项目(KJ2018B0005)。

摘　　要：为了研究端板型冷弯薄壁钢管混凝土框架连接节点的滞回性能,进行了4个节点试件的低周反复加载试验,研究了不同端板类型和钢管厚度下,连接节点试件的破坏形式、弯矩-转角关系、骨架曲线、节点刚性评价、耗能能力以及典型部位的应变分布。试验结果表明:外伸端板连接节点和钢管厚度为3 mm的平齐端板连接节点具有较高的强度、刚度和较好的抗弯性能、抗震性能及延性;钢管厚度为1.5 mm的平齐端板连接节点的滞回曲线呈捏缩状,耗能性能稍弱;在采取可靠的构造措施后,此类节点能用于实际工程。In order to study the hysteretic behavior of the endplate joints for concrete-filled thin-walled steel tubular(CFST)frames,the low cyclic loading tests of four joint specimens were carried out.The failure mode,moment-rotation relationship,skeleton curves,stiffness evaluation of joints,energy dissipation capacity and strain distribution of typical parts of joint specimens under different end plate types and steel tube thickness were studied.The test results show that the extended end plate joint and the flush end plate joint with a thickness of 3 mm have better strength,stiffness,bending resistance,seismic performance and ductility.The hysteretic curve of flush end plate connections with 1.5 mm steel tube thickness shows a pinch shape,and the energy dissipation performance is slightly weak.After taking reliable construction measures,this joint can be used in practical engineering applications.

关 键 词：薄壁钢管混凝土框架 端板连接 低周反复加载试验 滞回性能 破坏机理 

分 类 号：TU398[建筑科学—结构工程] TU317.1