Study On Seismic Behavior Of T-shaped Tubular Recycled Concrete Column-assembled Steel Beam Joint

With the development of prefabricated buildings and the national requirements of promoting green buildings, this paper studies the failure modes and seismic performance of the t-shaped steel tubular recycled concrete column and prefabricated steel beam joint. The concrete filled steel tubular column composed of 100% recycled concrete is selected. The seismic performance of prefabricated cantilever beam segment fully bolted joints, bolt-reinforced joints, steel tubular recycled concrete columns-Z-shaped prefabricated joints and z-shaped joints with upper and lower flange stiffeners designed according to the principle of equal strength design are studied. The failure models and hysteretic curves of four specimens were obtained by numerical simulation. The seismic behavior of cantilever beam joints affected by the number of flange bolts and the shape of cantilever beam joints was analyzed. The results show that the t-shaped steel tubular recycled concrete column-fabricated Z-shaped steel beam joint has good seismic resistance and can realize the outward displacement of the plastic hinge at the beam end. The anti-seismic capability of joints can be significantly enhanced by setting up upper and lower flange stiffeners and web side stiffeners.