Study on the Static Performance of H-shaped Steel Beam to Square Tubular Column Semi-Rigid Connections Steel Frame

In order to study the overall mechanical behavior of the new H-shaped steel beam to square tubular column semi-rigid connections in steel frame, the static performance, failure characteristics and bearing mechanism of the steel frame are studied by the medium-span static load test of the full-size steel frame and finite element simulation. The results show: when the vertical concentrated force is applied to the beam span, the buckling occurs in the mid-upper flange of the beam spans, and the plastic hinge is formed at the position of the beam span, while the deformation of the joint and the column is small, so the safety factor of the frame column and the joint region is high. Due to the semi-rigidity of the joint, the force and deformation of the joint region are smaller than the span of the beam, and the rotation angle of the joint meets the requirements for normal use of the structure. Therefore, the carrying capacity mechanism of the steel frame is reasonable. (paper)