Seismic Behavior Of Self-centering Buckling Restrained Braces And Continuous Beam Bridge

The traditional seismic structure system of bridges mainly uses its own damage to consume energy,leading to a large elastic-plastic deformation of the bridge and leading to the destruction of key parts of the bridge.Therefore,the bridge cannot continue to be used after the earthquake and cannot be repaired.To this end,we propose a self-centering buckling restrained brace that dissipates seismic energy through buckling restrained brace and relies on a self-centering system to eliminate residual deformation of the structure,enabling the consumption of seismic energy and reducing residual deformation.The main content of this article is:First,a new self-centering buckling restrained brace device is proposed,and how it works and its constituent methods are described,and its strength and stability are calculated.Analyze its working principle and reset way,reset the mechanical performance of the system,and finally give the evaluation index of this component.Use ANSYS to design this energy-consuming support and establish its finite element model.Parametric analysis was performed on this component to calculate the influence of different reset rib area,energy-consuming inner core area,and the elastic modulus of the reset rib on the performance of the component.Then ANSYS is used to establish the finite element model of the continuous beam bridge,and the energy dissipation support is installed on the continuous beam bridge to analyze the influence of different lengths,different numbers and different angles on the dynamic characteristics of the continuous beam bridge.Finally,the energy-saving and shock-absorbing effects of the self-centering buckling restrained brace on the continuous girder bridge are compared,and the response of critical parts of the continuous girder bridge under several conditions including different brace numbers,bracet angles and brace lengths is calculated.The results show that under the action of seismic waves,the response of key parts of continuous beam bridges with self-centering buckling restrained braces is reduced,such as the bending moment of bridge piers,the longitudinal displacement of bridges,and the shear strength of bridge piers,etc.The decrease shows that self-centering buckling restrained brace can effectively reduce the seismic response of the bridge and protect the safety of the bridge when an earthquake occurs.