Seismic Analysis of Long-span Cable-stayed Bridges Based on Viscous Damper
In order to optimize the longitudinal seismic system of long-span cable-stayed bridges,a nonlinear dynamic time history method was used to establish a finite element model of the long-span cable-stayed bridge.The dynamic response of various structural systems under earthquake action was studied,and sensitivity analysis and optimization design of damper parameters were carried out.The research results indicate that the semi floating system used in this project can meet the seismic requirements,and the setting of vis-cous dampers can significantly reduce the seismic response of structures.When the damping coefficient is set to 6 000 kN·s/m and the velocity index is 0.4,the seismic reduction effect that meets the design requirements can be achieved.
NETL
NSTL
万方数据
维普
