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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 ABAQUS finite element software was used to analyze the space intersection nodes in the skewed grid structure to study its ductility, stiffness degradation, strength degradation and energy dissipation capability under low cycle reciprocating loads. By changing the skew angle, Vertical plate thickness, transverse plate thickness, pipe radius to thickness ratio (diameter to thickness ratio) and other parameters, analysis of its impact on the node hysteresis performance. The results show that the ductility and energy dissipation capacity of the welded joints are good, and the stiffness degradation and strength degradation are not obvious. The most important factor affecting the seismic performance is the skew angle, followed by the diameter-to-thickness ratio of the steel pipe. The minimum impact is the vertical thickness of the pull plate and the thickness of the lateral partition plate.