斜交网格结构空间相贯焊接节点滞回性能的数值分析

NUMERICAL ANALYSIS OF THE HYSTERETIC BEHAVIOR OF SPACE WELDED TUBULAR JOINTS USED OF OBLIQUE-CROSSING GRID STRUCTURE

利用ABAQUS有限元软件对斜交网格结构中空间相贯节点进行分析,研究其在低周往复荷载下的延性、刚度退化、强度退化、耗能能力等性能,并通过分别改变斜交角度、竖向拉板厚度、横向连接板厚度、钢管半径与厚度之比(径厚比)等参数,分析其对节点滞回性能的影响。结果表明,此空间相贯焊接节点的延性和耗能能力良好,刚度退化和强度退化不明显。对抗震性能影响最大的因素是斜交角度,其次是钢管径厚比,影响最小的是竖向拉板厚度和横向分隔板厚度。

The behavior of space welded tubular joints applied in oblique-crossing grid structure was analyzed by the finite element software ABAQUS,such as ductility,stiffness degradation,strength degradation and energy-dissipating capacity under low cyclic loading. The effects of some parameters on the hysteretic hehavior of the joint was analyzed by changing the oblique-crossing angle,the thickness of vertical pulling plate and the radius-thickness ratio. The results showed that the space welded tubular joints owned better ductility and energy-dissipating capacity,meanwhile,the stiffness degradation and the strength degradation were not obvious. The main factor of influencing the seismic performance was oblique-crossing angle,followed by radius-thickness ratio,and the thickness of vertical pulling plate and transverse splitter plate had minimal impact on the seismic performance.