Q460钢管管板连接节点的受弯性能试验研究  

Experimental Study on Flexural Performance of Q460 Tube-gusset Joint

作　　者：王先铁[1] 李博凡 刘海锋 吴小丽 杨博乐 WANG Xiantie;LI Bofan;LIU Haifeng;WU Xiaoli;YANG Bole(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;China Electric Power Research Institute,Beijing 100055,China;Power China Chengdu Engineering Corporation Limited,Chengdu 611139,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中国电力科学研究院有限公司,北京100055 [3]中国电建集团成都勘测设计研究院,四川成都611139

出　　处：《湖南大学学报（自然科学版）》2023年第11期98-109,共12页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51678474,52278213)。

摘　　要：对是否设置加强环板、不同节点板宽度和钢管轴压力的6组共12个Q460钢管管板连接节点进行受弯承载力试验研究.结果表明:无加强环板试件在节点板两端由于应力集中,承载力较低,有加强环板试件的节点板两端应力分布均匀,试件承载力显著提高.当节点板宽度与钢管直径之比由2.5增大到3.0时,无加强环板、1/4加强环板、1/2加强环板试件的承载力分别提高6.10%~16.07%、13.36%~20.68%、9.61%~12.34%.与无加强环板试件相比,1/4加强环板试件的承载力提高102.86%~130.73%,1/2加强环板试件的承载力提高129.88%~166.33%.当钢管轴压比由0.10增大到0.23时,无加强环板、1/4加强环板、1/2加强环板试件的承载力分别降低10.05%~17.77%、10.79%~16.20%、4.74%~7.05%.现有规范对于无加强环板节点的承载力计算偏于保守.考虑加强环板和钢管轴力对节点受弯承载力的影响,提出了Q460钢管管板连接节点的受弯承载力计算公式,与试验结果吻合较好.The flexural tests of 6 sets of Q460 tube-gusset joints,involving three parameters of reinforced ring plates(unreinforced),gusset plate widths,and axial compression force of the tube,were carried out.The results show that the load-bearing capacity of the unreinforced specimens is lower than that of the specimens with reinforced ring plates because of the stress concentration in both ends of the gusset plate.With the ratio of the width of the gusset plate to the diameter of the tube increasing from 2.5 to 3.0,the load-bearing capacity of the specimen with unreinforced,1/4,and 1/2 ring plates is increased by 6.10%~16.07%,13.36%~20.68%,and 9.61%~12.34%,respectively.Compared with the unreinforced specimens,the load-bearing capacity of the specimen with 1/4 and 1/2 reinforced ring plate is increased by 102.86%~130.73%,and 129.88%~166.33%,respectively.With the axial compression ratio of the tube increasing from 0.10 to 0.23,the load-bearing capacity of the specimen of unreinforced,1/4,and 1/2 reinforced ring plate is decreased by 10.05%~17.77%、10.79%~16.20%、4.74%~7.05%,respectively.Several design guidelines are too conservative for the joint without reinforced ring plates.The loadbearing capacity calculation method of the Q460 tube-gusset joint was proposed considering the effect of the reinforced ring plate and the axial compression force of the tube,which agrees well with the test results.

关 键 词：Q460钢管管板连接节点 受弯性能 试验研究 有限元方法 承载力计算公式 

分 类 号：TU392.3[建筑科学—结构工程]