Analysis On Mechanical Behavior Of The New Superimposed Slad Shear Wall

In order to meet the requirements of the new urbanization and the de velopment of wisdom city construction,the country accelerate industrialization construction,prefabricated structure has gradually become the focus in the industry by guiding with policy.New superimposed slad shear wall proposed in this paper is improved from the double plate composite type shear wall.According to domestic and foreign research present situation and the engineering situation,its innovation is in the aera of composite surface shear structure form,processing methods of steel bar in the e nd of prefabricated plate and the form of the connection of the joint between steel bar,with different eccentricity,axial-load ratio for design parameters,design of two groups of five new superimposed slad shear walls and two pills of fully cast-in-place shear walls.Due to objective reasons,this subject has not been tested,only using ABAQUS finite element software for numerical simulation,and increase the analysis of the model of slab shear wall without the shear bearing slot,and study the failure process,failure pattern and the bearing capacity and seismic performance of specimen in eccentric loading,monotonic horizontal loading and low cycle load.The simulation results show that the failure process of the new composite specimen under eccentric load is basically the same as that of the whole cast-in-place,and their axial-flexural behavior is similar.Under the effect of monotonous horizontal load,the horizontal bearing capacity of the new composite specimen increases with the axial compression ratio under the 0.4,and then no longer increases,and the ductility performance decreases sharply.The prefabricated plate with circular shear bearing slot can improve the load capacity and deformation capacity of the specimen.The friction coefficient of the overlapped surface is not obvious to the bearing capacity of the specimen.Under the low cycle reciprocating load,cause of the surface of the composite,the phenomenon of "pinch approach" of hysteresis curve of the new type of composite specimens is more apparent,specimen affected by shear more,its carrying capacity and energy dissipation capacity is slightly lower than the whole cast-in-situ specimen,basic consistent stiffness degradation is similar;In the process of loading,there is no large separation of the overlapped surface,and the current casting part of the new type of composite specimen will get plastic damage earlier than the precast part,and the damage degree is more sufficient.