Experimental Study On Seismic Performance Of Reinforced Concrete Ductile Energy-dissipating Walls And Analysis Of Structural Seismic Response

In the wake of fast-growing development of economy environment and society,the bottom flexible frame structure is more and more widely used in cities because of its excellent performance.However,the bottom flexible building is prone to the whole collapse caused by the collapse of the bottom,resulting in great harm.Existing researches mainly focus on metal energy dissipators,while concrete energy dissipators are less.The article content specifically are as follows:(1)Three reinforced concrete ductility energy dissipation walls were subjected to pseudostatic tests,and the failure mode hysteresis curve,skeleton curve,ductility coefficient and accumulated energy consumption were studied.The results of quasi-static test show that the reinforced concrete ductility energy dissipation wall designed according to the principle of displacement Angle amplification has good bearing capacity,excellent deformation capacity and stable hysteretic energy dissipation property.The energy dissipation capacity and ductility of reinforced concrete ductility energy dissipation wall increased by 6% and 52% after vertical joints were installed in the wall body,and the parallel arrangement of ductility energy dissipation wall effectively slowed down the stiffness degradation rate.After the steel plate is built into the reinforced concrete ductility energy dissipation wall,the cooperative effect of the steel plate and concrete is good,and the damage degree of the specimen is effectively reduced.The built-in steel plate can obviously reduce the stiffness degradation of the ductility energy dissipation wall and play a positive role in the seismic resistance of the structure.The comparison between the experimental values and the theoretical values shows that the calculation method of the energy dissipation wall based on the specification is reasonable to some extent.(2)Based on SAP2000 software,the 10-story bottom flexible frame structure is taken as the research object,and reinforced concrete ductility energy dissipation wall is added to the structure,the calculation model of the bottom flexible building with reinforced concrete ductility energy dissipation wall is established,and the earthquake response of the two structures under the near field and far field vibration is studied.The results show that the reinforced concrete ductility energy dissipation wall can reduce the floor displacement,the inter-floor displacement Angle and the floor shear force of the structure,and can effectively control the seismic response of the structure.In the event of earthquake damage,the reinforced concrete ductility energy dissipation wall can enter plasticity and hysteresis energy dissipation before the bottom flexible frame structure,which provides reliable safety guarantee and good seismic energy dissipation mechanism for the main structure.(3)The ABAQUS finite element analysis software was used for numerical analysis of reinforced concrete ductility energy dissipation wall.Based on verifying the rationality and authenticity of the three-dimensional mesoscopic finite element model of the energy dissipation wall,the impact of strain rate on the seismic performance of the reinforced concrete ductility energy dissipation wall was studied.The numerical results show that the mesoscopic analysis method can well reflect the seismic performance of reinforced concrete ductility energy dissipation wall.With the increase of strain rate,the bearing capacity of the energy dissipation wall increases and the damage becomes more serious.