Study On Seismic Behavior Of Prefabricated Shear Walls Under A New Horizontal Joint Connection Method

Prefabricated construction is a resource-saving and environment-friendly buildings,It plays an important role in the rapid development of construction industry.Many scholars at home and abroad have done a lot of research on prefabricated construction technology.Especially,the method of connection between prefabricated building members and their seismic performance are studied.By referring to the bolted connection method in steel structure and introducing it into the connection between prefabricated shear walls,A new method of bolt connected prefabricated reinforced concrete shear wall are presented in this paper.Construction method of forming dry connection of reinforced concrete shear wall.Carrying capacity analysis by numerical simulation method,parameter According to the simulation results,the local optimization design is carried out and the seismic performance and failure mode of the prefabricated shear wall are studied by designing the model test of the prefabricated shear wall.The main achievements are as follows:(1)On the basis of consulting relevant literatures about prefabricated shear walls at home and abroad,this paper analyzes and summarizes the latest research results and techniques of prefabricated shear wall connections.This paper introduces the characteristics of each common connection technology and the application of the connection technology in the current engineering practice.(2)Referring to the existing research results,a new type of horizontal joint connection method for prefabricated shear walls is proposed,and the detailed structure of each part of the connection method is expounded,and the modeling and analysis with the help of ABAQUS software is carried out.This paper optimizes the design of shear keys in the region of hidden columns at the joints of prefabricated shear walls,and analyzes the bearing capacity and seismic performance of the new prefabricated shear wall under reciprocating loads.(3)In order to verify the feasibility of the assembly and construction scheme of the new prefabricated shear wall horizontal joint connection device,the low cycle reciprocating load test of the prefabricated shear wall under the new connection mode was carried out.Three groups of assembled shear wall specimens with horizontal joints and one group of cast-in-place integral shear wall specimens of the same size were designed.Low cycle reciprocating load tests were carried out on them.The strength and stiffness of assembled shear walls were compared and analyzed with the change of axial compression ratio.The influence of ductility and energy dissipation capacity on seismic performance index.On this basis,the practicability and improvement of the proposed new connection mode are analyzed.(4)To understand the working stability of the new connection mode in the frame-shear wall structure under strong earthquake,three groups of frame-shear wall structure models are established by using the multi-scale modeling method,and the seismic response analysis is carried out.By comparing the parameters such as interstory displacement response and interlaminar displacement angle envelope and so on,the influence of the new connection mode on the structural response is analyzed,and the working stability of the connecting device under the action of structural shock is evaluated.