Development And Performance Study Of New Connection Between Precast Concrete Laminated Floor Slab And Steel Beam

In recent years, with the rapid development of the steel structure technology in our country, especially, the prefabricated steel structure residence system, because of its easy installation, renewable utilization of resources and other advantages. It is as a new industry promoting the sustainable development of the green building industry and it is our research direction to realize the industrialization of residential in the future.In the steel structure residence system, the floor slab as important maintenance system plays a very important role, and the performance of the connection between floor slab and the main structure is good or not, which directly affects the stability and safety of the entire residential structure system. Therefore, the selection floor slab and connectors selection are crucial to the performance of the integral structure. In this paper, mainly introduced the precast concrete laminated floor slab. It has become the priority selection to the assembled steel structure residential system, because of its large stiffness, great crack resistance performance and convenient construction. The engineering practice shows that, although this kind of floor slab has many advantages, the part of the connection with the major structure still has some problems. So, to solve the connection problem between the precast concrete laminated floor slab and steel beam has become the research focus to promote the steel structure housing industry today. Research shows that, shear connector is the key link of precast concrete composite slab and steel beam work together. It plays a decisive role in the overall performance of precast concrete composite slab and steel beam connection. It is the important means to ensure its overall joint force and deformation of coordination.In this paper, two new connection forms are designed. Complete the connection between the precast concrete laminated floor slab and steel beam by the bent bar shear connectors with four corners and T-section steel shear connectors. Experimental research was carried out about the two kinds of new connection forms. Combined with experimental results, load-strain curve, load-displacement curve and crack detection and so on, the mechanical performance of the two kinds of connection form was analyzed. Come to a conclusion, both two kinds of connections have good ductile. And compared with the connections between the traditional composite slab and steel beam, shear strength and the ability to resist waves are improved and the overall performance of the specimens is better.