Experimental Study On The In-Plane Mechanical Feature Of The New-Type Prefabricated Monolithic Floor Slab

In recent years,prefabricated floor get in our building design and construction of houses has been widely used,however,on the inner assembly-floor flat performance study was small,if it can be assumed that the plane of the floor to the rigid design,especially in multilayer structures and high-rise building design,it remains controversial.In order to clarify inside prefabricated floor flat performance,provide a scientific basis for the calculation model and design methods,urgently carry out experimental and theoretical studies and fabricated floor slab connection.(1)Study of the prefabricated floor monolithic slab specimens performanceThis paper presents a new type of prestressed hollow cast by the panel and the rear edge member assembly consisting of new monolithic floor,increasing the rigidity of the floor plane by constraining connection methods to improve the structural integrity.Specimens were unidirectional in-plane loading tests repeatedly analyzed within the plane floor plane mechanical performance calculation Floor stiffness.The results show that the new assembly in a plane monolithic slab good performance,reliable connection seams,can replace the whole floor situ type,or alternatively have cast surface layer general assembly floor;connection method is proposed constraint reasonable and feasible.(2)Performance study on the shear resistance connection node of theprefabricated monolithic floor slabFor the connection of new monolithic floor slab at the assembly may occur,making the shear connectors specimen,the specimen is loaded in the plane of the test launch,studied under in-plane shear behavior of loads connected at the seam;according to the results of existing research results and to derive the corresponding shear bearing capacity of shear connectors and mounting specimens monolithic floor slab joint formula for the new assembly monolithic floor slab design and checking of connections,It provides an experimental basis and theoretical formulas.(3)Finite element analysis on prefabricated floorBy using the large finite element software ABAQUS to establish a new assembly monolithic floor slab finite element model,transform size specimen edge member and the side beam longitudinal reinforcement diameter,were analyzed load finite element simulations in multiple specimen plane,got the specimen plane within the elastic limit cracking load and load floor make up for insufficient number of specimens,the test results were replenished.Analysis showed that the edge beam reinforcement ratio on the floor inside the plane by a greater influence on performance for the new assembly monolithic floor slab edge member design.