Experimental Study On Seismic Performance Of Precast Prestressed Concrete Coupled Shear Walls

Into the twenty-first century, with the booming of real estate industry, cities into the high growth period of high housing. At present, the structural system of virtually all residential uses steel reinforced concrete frame or pure shear wall structure. The existence of such a structural system with low level of industrialization, resource consumption, labor-intensive field, noise nuisance and other shortcomings of the construction site. The prefabricated wall structure of this paper has a high degree of industrialization, construction speed, easy to guarantee the quality, small construction of the labor intensity, and environmentally-friendly and so on.Residential structure for the most common of coupled shear walls, this article was in the precast prestressed coupled shear walls under low cyclic loading performance test and finite element analysis. Article is mainly reflected in the following areas:Designed a prefabricated, prestressed coupled shear walls and a cast of coupled shear walls of the test model,which were axial load ratio of 0.3, concrete strength grade C30.The model were in the low cyclic loading test. According to test data analysis the difference of the bearing capacity, ductility, energy dissipation and stiffness degradation. In the pilot study, based on the finite element software ANSYS, pre-loaded specimens were one-way non-linear analysis of the whole process, through experimental and finite element analysis compared the results obtained in good agreement with the test specimen the analysis model. Then, using ANSYS to made the calculation and analysis of different axial compression ratio and different intensity of precast prestressed concrete coupled shear walls were one-way model of the whole process of nonlinear load.(1) Comparison of experimental phenomena. The same is the destruction of the two samples are first destroyed prior beams, walls and ground beam junction limb damage in the post. The difference is that prefabricated wall crack specimens the distribution of small, narrow crack width, unloaded fundamental to crack closure, residual deformation is small, reflecting the recovery of good.(2) Comparison of experimental data analysis. Coupled shear walls has a greater pre-cracking load, ultimate load, and stiffness and restore ability, and to reach yield load of the stiffness before the decay rate slower than the cast specimens.Coupled shear walls, pre-deformation and ductility lower, although even before the reach the ultimate load capacity with good energy, but more than the ultimate load capacity after the rapid decline in energy consumption, overall energy dissipation is still less than the test cast pieces.(3) Finite element calculation analysis. Ductility with the increase of axial compression ratio of 0.2～0.4 is to first increase and then decrease, carrying capacity in axial compression ratio of 0.3, the highest deformation in the axial compression ratio of 0.3. Considering capacity, ductility and energy dissipation capacity, for 6 to 7 degree earthquake intensity area in residential precast prestressed structural system of coupled shear walls, the proposed representative of the value of their gravity loads under the wall for the axial compression ratio of 0.3 the best overall performance.Concrete grade range in the C20～C40, precast concrete coupled shear walls with the level of increase, carrying capacity will increase, deformation also increases.