Influence Of Central Buckle On Dynamic Characteristics And Seismic Response Of Suspension Bridge

Suspension bridge across the main cable and stiffening beam connection structure can be divided into the central buckle and not set the central buckle,the central buckle in the form is divided into rigid central buckle and flexible central buckle.The impact of the central buckle on the rigidity of the suspension bridge has had a lot of work on the dynamic characteristics of the suspension bridge and the earthquake response.However,the previous studies have focused on a main span span suspension bridge,The central buckle of the suspension suspension bridge is systematically studied in the static and dynamic effects.Based on this paper,we use the large-scale general software ANSYS to establish different main span span suspension bridge model.The following aspects are studied for the influence of the central buckle on the dynamic characteristics and seismic response of the main span span suspension bridge.(1)Summarizes the theory of bridge seismic design and the static and dynamic calculation theory of large span suspension bridge and introduces the basic requirements of seismic design of long span suspension bridge are briefly.the full-bridge model with main span of 1196 m,997.6m,799.2m,600.8m,402.4m suspension bridge is established respectively by using ANSYS.The coordinate and stress of the model under the self-weight load are obtained by ANSYS,and the static and dynamic analysis of the long-span suspension bridge is carried out in this state.(2)Analyzes the influence of the central buckle setting on the stiffness of the suspension towers with different main span under the action of the Lateral static wind,the vertical lane,and the of vehicle movement.compares the influence of three different setting forms on the displacement of the stiffening beam in different span suspension bridge,and the main axle of the main cable.compares the influence of three different setting forms on the displacement of the stiffening beam,the main axle and the main cable on the central force.(3)Analysis large deformation prestressed Modes and The influence of the same central buckle on the vibration mode and the natural frequency under different span.(4)This paper systematically studies the response of EI-Centro wave and Tianjin wave on suspension bridge stiffening beam,main cable and main tower besides,compares theinfluence of the setting of the central buckle on the seismic response of the suspension bridge.