钢板加固螺栓球节点力学性能试验研究  

Experimental study on mechanical properties of bolted spherical joints strengthened with steel plates

作　　者：宫志群 丁北斗[3] 马占国[3] 张峰 赵胤琦 张亮亮 GONG Zhiqun;DING Beidou;MA Zhanguo;ZHANG Feng;ZHAO Yinqi;ZHANG Liangliang(China Construction Infrastructure Co.,Ltd.,Beijing 100029,China;China Construction East China Investment Co.,Ltd.,Xuzhou 221005,China;Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,China University of Mining and Technology,Xuzhou 221116,China;China Construction Municipal Engineering Co.,Ltd.,Beijing 100071,China)

机构地区：[1]中国建设基础设施有限公司,北京100029 [2]中建华东投资有限公司,徐州221005 [3]中国矿业大学江苏省土木工程环境灾变与结构可靠性高校重点实验室,徐州221116 [4]中建市政工程有限公司,北京100071

出　　处：《建筑结构》2024年第3期15-20,30,共7页Building Structure

基　　金：中建基础科技研发计划资助项目(CSCIC-2020-KT-(03));徐州市科技局社会发展项目(KC19216)。

摘　　要：针对螺栓球节点高强螺栓漏拧、少拧的情况,实际工程中常采用焊接钢板加固螺栓球节点来保障螺栓球节点承载力。为探究钢板加固螺栓球节点的破坏形式及极限承载力规律,对三组高强螺栓拧入深度0.5d(d为螺栓直径)螺栓球节点采用钢板加固并进行受拉承载力试验。试验结果表明,钢板加固螺栓球节点虽能提高节点的承载力,但试件高强螺栓和钢板变形很难协调,共同受力不理想,易发生局部破坏。故对原有加固方法进行改进,并进行加固后螺栓球节点拉伸破坏试验。结果表明,改进后的钢板加固螺栓球节点力学性能得到很好的提升,可为螺栓节点加固提供保障。Aiming at the high⁃strength bolts’fake tightened⁃up phenomena of the bolted spherical joints,welded steel plate is often used to reinforce bolted spherical joints to ensure its bearing capacity in practical engineering.In order to study the failure mode and ultimate bearing capacity law of bolted spherical joints strengthened with steel plate,three groups of bolted spherical joints strengthened by steel plates with 0.5d(d is bolt diameter)high⁃strength bolts’screwed depth were tested for tensile strength.Experimental results show that the bearing capacity of bolted spherical joints strengthened with steel plates can be improved,but it is difficult to coordinate the deformation of high⁃strength bolts and steel plates,and local failure occurs due to the uncoordinated stress of joints.The original reinforcement method was improved,and the tensile failure tests of bolted spherical joints after reinforcement were carried out.The results show that the mechanical properties of the improved steel plate reinforced bolted spherical joints are greatly improved,which provide guarantee for the reinforcement of bolted joints.

关 键 词：螺栓球节点 高强螺栓 假拧 节点加固 

分 类 号：TU393.3[建筑科学—结构工程]