Seismic Response Analysis of Cable-stayed Bridges with Low Towers Considering Ground Motion and Hydraulic Power
In order to explore the influence of ground motion hydraulics on the seismic response of bridges,taking a deep-water low-pylon cable-stayed bridge as an example,ABAQUS was adopted to establish a finite element model that can accurately simulate the spatial distribution of stay cables on the bridge tower.Based on the radiation wave theory,the analytical solution of ground motion hydraulics of components with different cross-section sizes was calculated,and it was attached to the pile group foundation of high pile caps through the joint mass.The influence of ground motion hy-draulics on the dynamic characteristics and seismic response of deep-water low-pylon cable-stayed bridges was ana-lyzed.The results show that the seismic hydraulic force will increase the natural vibration period of the deep-water ex-tradosed cable-stayed bridge,and the growth rate of the tenth-order natural vibration period is 21.21%.The ground motion hydraulic will significantly increase the dynamic response of the structure.Under the Imperial Valley seismic wave,the longitudinal sheer force of the bridge tower increases by 25.44%,and the longitudinal bending moment in-creases by 25.54%.Under the Borrego seismic wave,the transverse shear force increases by 21.58%,and the trans-verse bending moment increases by 18.43%.In the seismic design of deep-water extradosed cable-stayed bridge struc-ture,the influence of ground motion hydraulic cannot be ignored.
万方数据
维普
