Experimental Study And ABAQUS Analysis About Seismic Performance Of Precast Prestressed Concrete Shear Wall

The commonly used structures by high-rise residential buildings include cast-in-place reinforced concrete frame or a pure shear wall structure. There are some shortcomings in these structures, such as low levels of industrialization, poor quality of the construction, excessive consumption of resources, heavy intensity of on-site labor work, large amount of wet work, slow construction, excessive noise generating along the construction, against environmental development and so on. With the rapid development of real estate, the precast prestressed shear wall is gradually opening to the application. Such structure has the advantage of high speed of construction, good quality of construction, less energy waste, less on-site wet work, small intensity of labor work, etc. However, in our country, to apply this precast prestressed shear wall structure to the high-rise residential systems remains to be further studied.Aiming at the most common form of current residential structure—shear walls, this paper conducts the experimental study and theoretical performance analysis of the seismic function under low reversed cyclic load. The analysis carried out is based on the post-tensioned wall linked to the full of precast shear wall residential system, the basic wall structure in residential system—precast prestressed straight wall, precast prestressed T-wall and precast prestressed coupled shear walls. The paper needs to do the main content of the following areas:According to different wall section forms, we have designed precast prestressed straight wall, precast prestressed T-wall and precast prestressed coupled shear walls and their corresponding cast-in-situ shear wall models. We conduct the level of low cyclic loading test and analyze its failure modes, the skeleton curve, yield load (yield displacement), stiffness degradation, energy dissipation, ductility and other characteristics. Based on the experimental study, we apply the software of ABAQS to analyze the specimens using a nonlinear finite element analysis. After comparing the results of the experiment with the finite element analysis, we obtain the coincident calculation model. Then we continue to analyze the axial compression ratio, the prestressed concrete strength ratio and the effective shear wall of precast prestressed specimens yield load, ultimate load and deformation capability. The conclusions are followed:(1) Test that:the most destruction of prefabricated wall focuses on the weak wall area---the wall near the roots and even beams segments. According to the wall cracks in the specimen at failure, bending destruction is the main form.(2) The prefabricated wall has the following characteristics:large yield load and ultimate load, stiffness, strong ability of deformation recovery, slow attenuation of shear stiffness, poor capacity of deformation and ductility.(3) Analysis of finite element analysis software ABAQUS obtained:with the increase of the axial compression ratio, the load capacity and stiffness of the prefabricated wall increase, but the deformation capacity and ductility decrease.(4) Analysis of finite element analysis software ABAQUS obtained:with the increase of the concrete strength grade, the carrying capacity increases, and the capacity of deformation first increases and then decreases.(5) Analysis of finite element analysis software ABAQUS obtained:with the increase of effective prestress, the deformation ability of the precast prestressed shear wall drops and the capacity of the ductility decreases.