| In order to create a Reinforced Concrete shear wall structure with good energy dissipation and restorability,a super-high performance rc RPC(Reactive Powder Concrete)shear wall structure composed of high strength rc and CFRP(Carbon Fiber Reinforced composites)reinforcement was presented.In this paper,two HRB500 high strength reinforced active powder concrete shear wall structures were subjected to quasi-static test,and a nonlinear finite element model was established to analyze the seismic performance of high strength reinforced RPC shear wall.The applicability of the model is verified by the experimental results and other literatures.Based on the established model,the seismic performance of rc shear wall and reactive powder concrete shear wall with different reinforcement forms was studied,and the parameter analysis of RPC shear wall with mixed reinforcement was carried out.The main research contents are as follows:(1)The background of this paper was introduced,and the research status of seismic performance of RPC and FRP reinforced concrete members was systematically summarized.The application of RPC and FRP reinforcement in the new construction project was reviewed in detail.(2)Made of two high strength steel reinforced RPC shear wall specimen,and the pseudo static test,introduced the test of different axial compression ratio,high strength steel reinforced RPC shear wall structure under low reversed cyclic loading experiment phenomenon,including stress and fracture development process,analyzed the two hysteresis curves,skeleton curves of the specimens,the accumulative energy curves,energy dissipation coefficient curve,strength degradation and stiffness degradation curve,ductility coefficient of performance,the residual deformation and the ability to reset.The results show that: the energy dissipation capacity,deformation capacity and ductility performance of the shear wall with low axial compression ratio and high strength reinforced RPC are better,but its bearing capacity,stiffness and recoverable performance are also relatively worse.(3)The nonlinear finite element software DIANA was used to simulate the two specimens,and the obtained hysteretic curve,skeleton curve and skeleton curve feature points were well consistent.On the basis of the verified model of r einforced RPC shear wall,the common reinforced concrete shear wall,the CFRP reinforced RPC shear wall and steel/CFRP reinforcement composite shear wall,reinforcement and the four different forms of shear wall were analyzed,and the analysis results show that compared with common reinforced concrete shear wall,wall limbs configuration CFRP tendons,dark column configuration of the shear walls are a mixture of high strength steel reinforced RPC energy-dissipating capacity increased by 36%,ductility coefficient increased by 25%,since the restoration capacity coefficient increased by 29%.It is verified that the proposed hybrid reinforced RPC shear wall structure system has good comprehensive seismic performance.Based on the verified model,the influences of different shear span ratio,experimental axial compression ratio,longitudinal high strength reinforcement ratio of dark column and longitudinal CFRP reinforcement ratio of wall limb on the bearing capacity,energy dissipation capacity,ductility performance and recoverable performance of mixed reinforced RPC shear wall were analyzed and studied. |
