方钢管柱可拆卸螺栓拼接节点轴向力学性能研究  

Research on axial loading behaviour of deconstructable bolt spliced square steel tubular columns

作　　者：范俊伟 杨璐 王元清[2,3] 班慧勇[2,3] FAN Junwei;YANG Lu;WANG Yuanqing;BAN Huiyong(The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,Tsinghua University,Beijing 100084,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]清华大学土木工程系,北京100084 [3]清华大学土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《建筑结构学报》2022年第10期307-319,共13页Journal of Building Structures

基　　金：北京市自然科学基金面上项目(8182029);清华大学国强研究院资助项目(2021GQC0005)。

摘　　要：为研究采用特殊三角盒装置固定螺母的单边拧紧高强度螺栓的闭口截面方钢管柱-柱拼接节点轴向力学性能,设计制作了5个节点,并对其进行轴向受拉和受压加载试验,得到节点变形、承载力等力学性能,并与按GB 50017—2017《钢结构设计标准》计算的承载力进行对比分析;对部分节点进行承载能力极限状态之后的可拆卸性能分析。在验证有限元模型准确性和有效性的基础上,采用ABAQUS有限元软件对节点的受力性能进行数值模拟分析,研究拼接区高强度螺栓拉力和板件接触面摩擦力的变化规律。结果表明:采用特殊三角盒装置固定螺母的单边拧紧高强度螺栓的闭口截面方钢管柱拼接节点构造简单、安装方便、易于拆卸,抗滑移承载能力和极限承载能力良好;受拉承载能力极限状态后高强度螺栓的拉力与板件间摩擦力损失相对较大;单边拧紧高强度螺栓的闭口截面方钢管柱-柱拼接节点承载力仍可按GB 50017—2017中的承载力计算式进行计算。In order to study the axial loading behaviour of the closed-section square steel tubular column-to-column splice joints with a novel blind bolted connection using a special triangular box device to fix the nuts, five specimens were designed, and their axial tension and compression tests were carried out. The deformation capability, ultimate capacity, and other mechanical performance of the specimens were obtained and compared with the load capacity calculated in accordance with GB 50017—2017 ‘Standard for design of steel structures’. The deconstructable performance was also studied after the ultimate limit state was reached. Based on the validated finite element model in terms of accuracy and efficiency, the finite element analysis software ABAQUS was used to simulate the mechanical properties of the specimens, the variation of the tensile forces within high-strength bolts, and the friction forces at the plate contact surface were obtained. It is shown that the closed section square steel tube column splicing joint with single side tightened high strength bolts using a special triangular box device to fix the nuts introduced in this study are simple in structure, easy for deconstruction, and possess good anti-slip bearing capacity as well as ultimate capacity. The tensile force loss in the high-strength bolts and the friction loss between contact plates are relatively large after the ultimate capacity is reached, and the load capacity of these new splice joints can still be calculated according to the load capacity calculation method in GB 50017—2017.

关 键 词：柱拼接节点 螺栓连接 单边拧紧 可拆卸 静力试验 有限元分析 受力性能 

分 类 号：TU391[建筑科学—结构工程] TU317.1