Theoritical Analysis And Shaking Table Test Of Isolated Bredges

The seismic performance can be improved significantly due to use of seismic isolation in building and other structures.Seismic isolation principle and technology have been widely used in abroad.But in our country,few bridges were designed by using seismic isolation technology in broad seismic area.So,it's a urgent need to carry out the research on seismic isolation technology.In this dissertation,a series of works has been done and the main contents of them are described as follows:In the beginning of this article, the mechanics character of lead-rubber bearing and the dynamic characteristics of isolated bridge are discussed. And then, straight and curve bridges for seismic responses of random vibration model was established by using equivalent linearization of random vibration theory. Furthermore, the calculation was greatly simplified in terms of transformation of random parameter. Based on a gread deal of calculation for the random response of straight and curve bridges, and in reference of existing research products, the relationship between PGA and OYR was proposed and the character of the random response of curved bridges was discussed. On the basis of the theory analysis, the shaking table test of regular isolated bridge, whether equipped oil damper between deck and piers, was carried out in order to check the dynamic response of the structures corresponding to different site condition.