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为丰富弱轴半刚性连接刚度数据库、研究端板连接节点刚度对钢框架结构抗震性能的影响规律,进行了弱轴端板连接节点的半刚性性能试验研究,得到了连接节点的弯矩-转角关系曲线,并借助有限元分析软件SAP2000对空间钢框架结构进行了抗震性能分析,得到了4个空间结构模型在多遇地震和罕遇地震下的结构时程位移曲线和层间位移角。研究表明:弱轴外伸端板连接节点刚度约为相同尺寸节点强轴方向的30%,节点变形能力较强,具有良好的耗能能力;节点刚度对结构的前三阶周期尤其是基本周期影响很大;端板连接钢框架在小震、大震下层间位移角均能满足规范要求且具有良好的抗震性能和抗连续倒塌能力。
In order to enrich the semi-rigid connection stiffness database of weak shaft and study the influence law of the stiffness of the connection of the end plate on the seismic performance of the steel frame structure, the semi-rigid behavior of the connection node of the weak shaft end plate was studied and the bending moment- With the aid of the finite element analysis software SAP2000, the seismic performance analysis of the space steel frame structure has been carried out. The displacement curves of the structure and the displacement angle of the four structures under the earthquake and rare earthquakes have been obtained. The results show that the joint stiffness of the outboard end of weak shaft is about 30% of that of the strong axis of the same size node, and the deformation ability of the joint is strong and has a good energy dissipation capacity. The stiffness of the joint to the first three stages of the structure, especially the basic period Which has a great influence on it. The displacement angle of the steel frame with the end plate connected with the small earthquakes and the large earthquakes can meet the requirements of the code and has good seismic performance and continuous collapse resistance.