摘要
为开展梁柱对接焊缝在地震作用下的损伤断裂研究,针对对接焊缝处衬板的厚度以及衬板焊接构造形式设计了4个梁柱节点试件,采用ANSYS有限元分析软件对4个试件进行了低周往复荷载作用下的数值模拟,对比分析了各试件在指定路径下的应力三轴度、等效塑性应变指数和开裂指数以判断其各自的断裂性能。结果表明:采用衬板四边围焊的构造方式对于对接焊缝区域的开裂可以起到减缓作用,并可缓解衬板厚度变化对于对接焊缝区断裂性能的影响;建议梁柱对接焊缝的衬板采用四边围焊连接的构造形式。
In order to study the fracture of butt weld of beam-column joints under earthquake action,4 beam-column joints were designed in view of the thickness and the welding structure of the liner plate. The numerical simulation of 4 specimens under quasi-static loading was carried out by using the finite element analysis software ANSYS. It was made a comparative analysis of fracture properties of 4 specimens under specified path with both the stress triaxiality,plastic equivalent strain index and rupture index serving as determinate indicators. The analysis results showed that the welding structure of liner plate with four fillet welds could effectively retard the cracking of the butt weld zone. The influence of the thickness variation of the liner plate on the fracture performance of butt weld zone could be relieved by the structure of liner plate with four fillet welds. It is recommended that the liner plate at butt weld of beam-column joints should be connected with four fillet welds.
作者
倪延顺
王燕
NI Yanshun;WANG Yah(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)
出处
《钢结构》
2018年第9期30-37,78,共9页
Steel Construction
基金
国家重点研发计划课题项目(2016YFC0701204)
关键词
梁柱连接节点
对接焊缝
衬板
断裂性能
beam-column joint
butt weld
liner plate
fracture performance
