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为实现强节点、弱构件的抗震设计思想,保证支撑与梁柱采用板式连接时节点板的低周疲劳寿命高于被连接的支撑构件,使用ANSYS程序对支撑及节点板进行了大量有限元参数分析,研究了支撑轴线与柱夹角、节点板距支撑轴线最近的嵌固点向支撑轴线所做垂线与支撑端部的距离、节点板厚度、支撑长细比、工字形截面支撑翼缘宽厚比等参数对支撑系统(支撑和节点板)低周疲劳寿命的影响规律。提出了基于工字形截面支撑长细比和翼缘宽厚比不同取值情况下节点板支撑端部净距的确定方法,为节点板的抗震设计提供了依据。
In order to realize the aseismic design idea of strong nodes and weak components, the low-cycle fatigue life of the joint plate is guaranteed when the support and the beam column are connected by plate. The ANSYS program is used to conduct a large number of finite element parameters Analysis and study of the angle between the support axis and the column, the distance between the perpendicular to the support axis and the end of the support point between the support point and the support axis nearest to the support axis, the thickness of the support plate, the support slenderness ratio, the I-section support flange Law of aspect ratio and other parameters on the low cycle fatigue life of supporting system (support and gusset plate). The method of determining the clearance of the supporting end of the gusset plate based on the slenderness ratio of the I-shaped section and the aspect ratio of the flange is proposed, which provides the basis for the seismic design of the gusset plate.