Experimental Study On Seismic Behavior Of Assembled Monolithic Shear Wall Model

With the development of the "housing industrialization",the assembly structure is strongly advocated by the state and industry,has gradually been widely used in the field of architecture.In this paper,based on the shaking table test of the integral shear wall model,the elastic-plastic time-history calculation and the seismic response analysis are carried out to master the overall response behavior and seismic performance of the integral shear wall structure under earthquake action.The seismic performance of the integral shear wall structure in the high intensity region is studied by comparing the results of the finite element analysis with the experimental results.(1)According to the connection technology of precast wall panels in the construction process of integral shear wall structure,innovative prefabricated panel in situ construction of the production process was put forward.The dynamic characteristics of the model structure,the acceleration amplification coefficient,maximum story drift angle and the floor shear force were studied though the shaking table test of a 12 story shear wall structure with a scale ratio of 1:5.Structural crack development and failure phenomena were recorded;(2)Based on the structure of the integral shear wall model,the shaking table test of the simulated earthquake was carried out.Based on the similar relationship,the particulate concrete was used as the main structure of the model and its elastic modulus,compressive strength and stress-strain curve were obtained by experiment;(3)The calculation model of the integral shear wall was established by ABAQUS.The dynamic characteristics of the structure were analyzed and compared with it in the test,and the rationality and reliability of the finite element modeling were verified;(4)The seismic behavior of the assembled shear wall model was analyzed by ABAQUS,and the displacement response,the inter-layer displacement angle response,the acceleration response and the substrate shear response were analyzed in comparison with the results of the shaking table.The overall response behavior and seismic performance of the integral shear wall model structure in the high intensity region were studied.The damage structure,damage development and damage condition of the test structure under different seismic fortification levels were analyzed,and the weak layer of the structural model of the integral shear wall was found out.Some measures such as increasing the strength of concrete,increasing the section size,increasing the lateral stiffness of the weak layer of the structure and strengthening the connection between the precast wall panel to enhance its integrity were proposed.