Seismic Response Analysis Of Small Radius Curved Girder Bridges And Reduce Isolation Study

On the basis of new Wuhan railway station western No. 10 # viaduct, a 5×25m pre-stressed concrete continuous beam bridge (R=55m), the present paper emphasizes on a study of seismic response and isolated earthquake in small-radius curving bridge.Influencing factor of seismic response and the one of isolated earthquake in small-radius curving bridge have been studied. Meanwhile, with the collision analysis, seismic response of curving bridge after isolation method under high-intensity has been analyzed. The main contents of this paper are presented as follows:1. With the comparison of accuracy and validity of three models, shell element model, single beam model and the spine-like beam model, it is concerned that spine-like beam method is most effective method of simulated seismic response to small-radius curving bridge.2. On the basis of new Wuhan railway station western No. 10 # viaduct, a series of issues have been systematically discussed, including follow-up structure, pile-soil-structure interaction, stiffness of piers, input direction of seismic vibration, boundary types as well as the impact of bearing eccentricity on bridge seismic response. Multi-dimensional seismic characteristics and the impact of earthquake wave characteristics for small-radius curving bridge have been analyzed. Furthermore, a detailed comparison of straight and curving bridge in seismic response has been studied.3. With taking account of a double-direction coupling LRB model, isolation effects of small-radius curving bridge has been analyzed. Meanwhile, a series of factors on isolation effects of small-radius curving bridge have been discussed, including parameters of LRB, follow-up structure, pile-soil-structure interaction, stiffness of piers and input direction of seismic vibration. In this way, Multi-dimensional seismic characteristics of small-radius curving bridge have been analyzed.4. Collision analysis before and after isolation of small-radius curving bridge has been studied. Its effect on isolation of small-radius curving bridge has been discussed...