使用改进端板连接节点的钢框架力学性能试验研究OA

At present,conventional end-plate connections can only join H-shaped steel beams to the strong axis of H-shaped steel columns.This paper presents an improved end-plate connection:by installing special stiffeners in the weak axis direction of the H-shaped steel column,frame beams in both directions can be connected to the column using identical end-plate joints.The study focuses on examining the influence of these special stiffeners on the mechanical behavior of the frame along its strong axis.Two single-story,single-bay steel frames—one braced and one unbraced-were designed,both incorporating the improved connection.Monotonic lateral loading tests were carried out to assess the mechanical performance,and the internal forces and deformations of the two specimens were analyzed.Results indicate that the shear deformation in the joint core area is significantly reduced when using the improved end-plate connection.The addition of bracing notably enhances the stiffness and load-bearing capacity of the frame;however,it also alters the failure mode from bending of the end-plate to tensile fracture of the brace net section,which substantially reduces the ductility of the frame.