冷弯薄壁方钢管梁柱焊接节点抗震性能分析  

Seismic Performance Analysis on the Beam-column Welded Joint of Cold-formed Thin-walled Square Steel Tube

作　　者：王嵘[1] 姚勇[1] 褚云朋[1] 徐斌[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《工程抗震与加固改造》2016年第4期12-20,共9页Earthquake Resistant Engineering and Retrofitting

基　　金："863"计划重点项目(2009AA032304)

摘　　要：对8个冷弯薄壁型钢方钢管梁柱焊接节点进行低周往复加载试验及非线性有限元数值模拟分析,将循环荷载下节点的数值计算结果与试验结果进行对比分析讨论,结果表明数值模拟能够较好地反映试验结果,所采用的数值建模方法可以进行冷弯薄壁型钢梁柱节点的参数化分析。通过对两类梁柱节点不同参数下抗震性能的分析,所得结果表明:(1)对于GJD系列节点,随着加腋高度、长度、厚度三个参数的减小,节点的滞回曲线变得饱满,耗能能力增强,同时承载力没有明显的下降段,三个参数增大时,滞回曲线变化不大,但承载力提前进入下降段,延性降低;(2)加腋高度和厚度减小时,GJD系列节点的极限承载力以及初始刚度明显降低,但节点的延性增加明显;(3)对于XJD系列节点,增大钢管柱壁厚、C型钢梁厚度,以及减小C型钢梁高度、C型钢梁与方钢管相对位置时,滞回曲线变得饱满,耗能能力增强,并且承载力增大。A low cycle reciprocating loading test and nonlinear finite element analysis on the 8 beam-column welded joints of coldformed thin-walled square steel tube are carried out,and comparative analysis of the numerical results and the experimental results of the experimental joints under cyclic loading is carried out,the results show that the numerical simulation can well reflect the test results,the numerical analysis model and method can be used to analyze the parameters on the beam-column joints of cold-formed thin-walled steel. Through the analysis of seismic performance of two kinds of beam column joints with different parameters,the results show that：（ 1） With the increase of the height,length and thickness of the GJD series,the hysteresis curve of the node becomes full,the energy dissipation capacity is increased,and the bearing capacity is not significantly decreased,when the three parameters are increased,the shape of hysteretic curve is not changed,but the bearing capacity of the joints is reduced and the ductility decreases;（ 2） With the increase of the height and thickness of the GJD,the ultimate bearing capacity and the initial stiffness of the series are obviously decreased,but the ductility of the joints is very obvious;（ 3） For the XJD series node,the wall thickness of the steel tube,the thickness of C type steel beam,and the relative position of the C type steel beam height and the C type steel beam are increased,the hysteretic curve becomes full,the energy dissipation capacity is enhanced,and the bearing capacity is increased.

关 键 词：冷弯薄壁型钢梁柱节点 极限承载力 滞回性能 

分 类 号：TU391[建筑科学—结构工程] TU352.11