Experimental Study And Nonlinear Analysis On Seismic Performance Of L Shape Superimposed Wall Plane

In recent years, building energy-saving house, taking a new road to industrialization, and housing industry modernization have been the inevitable trend the real estate industry develops to. New materials and new structure system also arises at the historic moment. This paper brought up a new type of superimposed structure based on a concrete superimposed wall plane made in Germany, researched the seismic behavior of the L superposition type shear wall through horizontal cyclic loading experiment on the basis of previous studies,.and simulated with the finite element software ANSYS to compensate the shortage of test.Obtained the cracks distribution of the test specimens through low cycled reversed loading experiment, analyzed the failure pattern; analyzed the mechanical property from the load-displacement hysteresis curves and skeleton curves of the test specimens; and analyzed the seismic performance of structure with the indexes such as ductility coefficient, Working index and so on. By simulating with ANSYS, compared the differences on seismic performance between the superimposed planes and the reinforce ones, and analyzed the effect on the seismic performance of superposition type shear wall from axial-load ratios.The research contents of this paper are listed as following:(1) Carried out experiment on the model composed of two pieces of L superposition type concrete shear walls, analyzed its failure patterns and cracks distribution, and learned the overall performance of iterative structure. From the stress-strain curves of superimposed surface, learned the bond damage characteristics.(2) From the load-displacement hysteresis curves and skeleton curves of the test specimens, and through simulating Cast-in-situ shear wall with ANSYS, researched bearing capacity (cracking force, surrendering force, ultimate force), deformability and energy-dissipating capacity of cast-in-situ shear walls and superposition type shear walls.(3) Through simulating the stress distribution, failure patterns, bearing capacity (cracking force, surrendering force, ultimate force), displacement and ductility performance of L superposition type shear walls under different axial-pressure ratios with the finite element software ANSYS, researched the effect from axial-pressure ratios on the seismic performance of superposition type shear walls.