钢管柱-钢梁螺纹锚固单边螺栓端板连接受力性能  

Behavior of Beam-to-Column Endplate Connections by Thread-Fixed One-Side Bolts with Internal H-section Stiffeners

作　　者：周生展 武成凤 孙强 张伟成 张曼 刘梅[1] 王培军[1] 赵辉 尚衍卫 ZHOU Shengzhan;WU Chengfeng;SUN Qiang;ZHANG Weicheng;ZHANG Man;LIU Mei;WANG Peijun;ZHAO Hui;SHANG Yanwei(School of Civil Engineering,Shandong University,Jinan 250061,China;Qingdao Urban Construction Group Co.,Ltd.,Qingdao 256000,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]山东大学土建与水利学院,济南250061 [2]青岛城建集团有限公司,山东青岛256000 [3]东南大学土木工程学院,南京211189

出　　处：《建筑钢结构进展》2021年第6期22-29,共8页Progress in Steel Building Structures

基　　金：国家自然科学基金(52078280);山东省重点研发计划项目(2019GSF110011)。

摘　　要：在钢管柱柱壁和内置H形钢翼缘上设置带有螺纹的螺栓孔,来替代传统梁柱端板连接中高强螺栓的螺母。将高强螺栓直接拧紧在螺纹孔上,可实现钢管柱-钢梁节点的单边连接,简化安装过程。采用有限元方法研究了带有内置H形钢的螺纹锚固单边螺栓端板连接钢管柱-钢梁节点的破坏模式和承载力,并分析了钢管柱柱壁厚度、内置加强H形钢翼缘厚度和高强螺栓直径对节点受力性能的影响。分析结果表明:内置H形钢翼缘板上螺栓孔内的螺纹增大了螺栓孔对高强螺栓的锚固,有效地避免节点发生螺栓拔出破坏;当螺纹所在钢板的厚度大于螺栓直径时,螺纹孔对高强螺栓能提供足够的锚固力,避免发生螺栓拔出破坏;节点破坏模式主要为钢梁端板破坏和高强螺栓破坏。Internal threads tapped on the bolt holes of the column wall and the flange of the internal H-section stiffener can replace the nuts of traditional high-strength bolts.Directly tightening the high-strength bolts can realize the one-side connection of beam-to-column joints,thus simplifying the installation process.This paper focuses on the behavior of beam-to-column endplate connections bolted by the thread-fixed one-side bolts with internal H-section stiffener through finite element analysis.The effect of column wall thickness,H-section stiffener flange thickness,bolt diameter on the failure modes,moment-rotation curves and bending bearing capacity of the connection are studied.Analysis results show that the hole thread can provide enough anchor force and the bolt pull out failure could be avoided as the length of the internal hole threads is larger than the bolt diameter.Two main failure modes,which are the endplate plastic failure and bolt failure,are obtained through finite element analysis.

关 键 词：梁柱节点 加强措施 端板连接 单边螺栓 破坏模式 抗弯承载力 

分 类 号：TU312.1[建筑科学—结构工程]