加强环参数对矩形钢管柱-H型钢梁节点抗震性能的影响

Influence on Seismic Performance of Rectangular Steel Tubular Column-H Shaped Steel Beam Connection Due to External-diaphragm Parameters

矩形钢管柱-H型钢梁加强环节点具有出色的力学性能,以加强环沿梁外伸长度与梁翼缘宽度之比、加强环沿柱侧壁外伸宽度与柱截面宽度比、加强环边角宽度与梁翼缘宽度之比及加强环与梁翼缘厚度之比为分析参数,通过有限元分析软件ABAQUS建立节点实体模型,分析各参数对该节点抗震性能的影响。结果表明,该类节点的抗震性能优越,破坏模态受各类参数的影响较大,滞回性能易受加强环沿梁外伸长度与梁翼缘宽度之比的影响,骨架曲线、极限承载能力和刚度退化受加强环沿梁外伸长度与梁翼缘宽度之比和加强环与梁翼缘厚度之比的影响显著。

The rectangular steel tubular column-H shaped steel beam connection with external-diaphragm has excellent mechanical properties,the seismic performance of this kind of connection was analyzed by ABAQUS,the parameters were:the ratio of the length of the external-diaphragm along the beam side to the width of the beam flange,the ratio of the width of the external-diaphragm along the column lateral wall to the width of the column cross section,the ratio of the width of the external-diaphragm edge to the width of the beam and the ratio of the thickness of the external-diaphragm to the thickness of the beam flange.The results showed that the seismic performance of this kind of connections were superior;the failure modes of connections were affected by various parameters;the hysteretic performance were deeply affected by the ratio of the length of the external-diaphragm along the beam side to the width of the beam flange;skeleton curve,ultimate bearing capacity and stiffness degradation were deeply affected by the ratio of the length of the external-diaphragm along the beam side to the width of beam flange and the ratio of the thickness of the external-diaphragm to the thickness of the beam flange.