Experimental Study On Seismic Performance Of Precast Concrete Frame Shear Wall Structure

In contrast with traditional cast-in-situ concrete buildings,Prefabricated concrete buildings have the advantage of saving building materials,reducing labor costs,decreasing environmental pollution,etc,It can meet the demands of construction industrialization and are being widely used in our country.There are many problems with prefabricated concrete structures in engineering application.In this paper, the author conduct experimental research on the overall seismic performance of the prefabricated concrete frame shear wall structure. Research content includes the structure failure mechanism, bearing capacity, deformation, stiffness degradation, energy dissipation, etc. On the basis of test data, combined with structural seismic analysis method, Seismic performance will be analyzed.Test model includes three plane scale specimen, one is cast-in-situ specimen, the other two are prefabricated specimens, all three models have two layers and three dimensions. The cast-in-place specimen is used as comparison. Two prefabricated components adopt different disassemble forms. By applying horizontal low cycle loading on the models, observing the damage development process of structures, the data acquisition system collects structure internal force and deformation in the process of test, the author study the parameters related precast concrete frame- shear wall structure seismic performance, finally the author make evaluation of the seismic performance of structure system.The results show that the reasonable design of prefabricated structure disassemble forms has better deformation and energy dissipation capacity, which can be close to the cast-in-place structure, some performance is better than that of cast-in-place structure. From the experimental phenomena, crack development situation of three models are different and the final damaged forms are different, too. In terms of bearing capacity, the beam of cast-in-place happens local failure at late loading stage, which makes loading process incomplete. Its limit bearing capacity is small, ultimate bearing capacity value of two fabricated specimens is equal, but yield load of cast-in-situ is greater than of the assembly models; In terms of ductility, ductility coefficient of fabricated specimens is greater than the cast-in-situ model, under the influence of structure disassemble form, ductility of two assembly model are also different, ZP1 is better than that of ZP2;The author measure relative energy dissipation capacity of structure with energy dissipation coefficient, the coefficient of energy consumption of ZP2 is the largest, it shows the optimal energy consumption performance and the coefficient of cast-in-situ is minimum,its energy consumption performance is relatively poor; In terms of structural stiffness degradation, with thestructural displacement increasing, stiffness degradation speed of assemble specimen is greater than the cast-in-place, the two assemble ones are congenial, disassemble forms have little impact on stiffness degradation;Compared with the cast in place model,there is a different in the interaction between components of the precast model, The stress state at the interface of the shear wall is very complex,which has a great influence on the mechanical properties of the structure. Disassembling form effect on the performance of the cooperative work between structural componentsThe relevant parameters are obtained through the research on the seismic performance of precast concrete frame shear wall structure, which can provide reference for structure design and engineering application.