Study On Seismic Performance Of The Prestressed Concrete Cable-stayed Bridge

With the development of bridges, long-span cable-stayed bridge has gradually become the preferred type bridge。Because of its investment, it has a major impact on the national economy, once damaged in the earthquake, causing huge economic losses and severely affected disaster areas in the earthquake relief work and reconstruction。Therefore, take reasonable and effective measures on the long-span cable-stayed bridge seismic to ensure its security in the earthquake is very important to the social and economic significance。The ideology seismic design of the cable-stayed bridge is that the internal forces and displacements are smaller and better, circumstances, but these two aspects are often contradictory normally, to make smaller internal forces of reaction , often have to pay the cost of larger displacement, and vice versa。On the basis of theoretical research of the past bridge workers, research of modern seismic design on the cable-stayed bridge, From the norms of improvement,the new application design method,the seismic design process and specific aspects, to specific the long-spanbridge (cable-stayed bridge) seismic design。Combining specific example--Liaoning Yingkou Highway Bridge seismic studies, a detailed calculation of the dynamic characteristics of the bridge and the dynamic time-history analysis, through the calculating results to find the influencing factors of the cable-stayed bridge。By analyzing we can see that: cable-stayed bridge system,the border restrictive conditions has a certain impact on the bridge seismic design。Besides, the earthquake response is greatly different between Shun qiaoxiang and Heng qiaoxiang and differernt parts of the bridge。And comply deficiencies on the existing bridge seismic of China。In this paper, the law serving as the bridge seismic design can be used on other similar bridge seismic analysis and has some reference value。...