Concrete Self-anchored Suspension Bridge Seismic Performance Research

In recent years, a large number of self-anchored suspension bridges have been widely used in China, especially in the city bridge engineering or landscape requires higher bridge engineering. However, the mechanical properties of this type bridge structure, especially dynamic characteristics and seismic performance are not carried out systematic and deeply. Base on the summary of the literature of the domestic and international long-span bridge seismic research result, this paper studies the the dynamic characteristics and semeistic performance of the self-anchored suspension bridge structure, the main work is as follows:Concrete self-anchored suspension dynamic characteristics research. Finite element theory to establish the spatial finite element model to study the free vibration of the concrete self-anchored suspension, the study of such bridge modal shape distribution law, pursuant to the law of seismic response of concrete self-anchored suspension to make predictions.Using artificial seismic wave synthesis theory, the preparation of artificial seismic waves generated program, the program to generate a response spectrum consistent with the goal of artificial seismic waves. And time-histories analysis method, a detailed analysis of the the uniform excitation Analysis of concrete self-anchored suspension, given the bridge bridge seismic response of the general laws and seismic design pointsSeismic Response Analysis of concrete self-anchored suspension under non-uniform excitation. Considered ground motion spatial differences. Analysis of the impact of the wave velocity of the traveling wave effect, and the calculated results with uniform excitation, the calculation results of the traveling wave effect compared to the general laws of the seismic response of concrete self-anchored suspension of non-uniform excitation.