Experimental Study And Finite Element Analysis On The Seismic Behavior Of Squat Recycled Concrete Shear Walls

Along with the rapid development of transformation and construction industry in our country, the pollution of construction waste in the environment is becoming more and more serious. Popularization and application of recycled concrete is imperative. The study on the squat recycled concrete shear walls which mixed with recycled fine and coarse aggregate is relatively insufficient at home and abroad. This article has studied the seismic behavior of six squat recycled concrete shear wall specimens(RCSW-1~RCSW-6). The author analyzes the failure characteristics, hysteretic curves, skeleton curves, stiffness degradation, The bending deformation and shear deformation of the walls, characteristics of load and displacement and ductility and energy consumption of the walls and discuss the influence of axial compression ratio and distribution reinforcement rate on the walls. At the end six squat recycled concrete shear walls are simulated by the finite element software Marc, and the simulation results are compared with the experimental results.Result shows that the axial compression ratio of squat recycled concrete shear wall is very important. Increasing axial load ratio can enhance the ultimate bearing capacity and initial stiffness, but the ultimate deformation performance decreases and the stiffness degradation is fast. High axial compression ratio can enhance the proportion of shear deformation in the total deformation of the walls and the bending deformation decrease, which would make the recycled concrete shear wall appear shear failure. Therefore, we should control the size of the axial compression ratio to prevent the walls appear brittle failure in the squat recycled concrete shear wall’s design.The horizontal and vertical distribution reinforcement of the squat recycled shear walls have influence on producing and developing of the inclined cracks of the walls. For the specimens with the same axial pressure ratio, improving the ratio of the horizontal reinforcement can effectively restrict the crack spread and enhance the ultimate deformation performance of the components. But the influence on stiffness and the ultimate bearing capacity is not obvious. Through the simulation, finite element numerical simulation results agree with the experiment results well.