Design And Seismic Analysis Of High Pier And Long Span Continuous Rigid Frame Bridge With Double Track Railway

Bridge is an important structure of crossing roads, railways and various obstacles, which occupied an extremely important position in transportation industry. Because of its adaptability, simple force, convenient construction, low investment, high economic efficiency, good overall performance, large rigidity, small deformation, good seismic performance and other advantages, the long span prestressed concrete continuous rigid-frame bridge becomes a very useful bridge-type structure. It is widely used in modern roads, railway construction. As a country with vast territory, many places of China are located in earthquake zones. And the seismic activity is frequent. The earthquake caused heavy losses to the country and people. The bridge is the throat of traffic. When an earthquake occurs, if the bridge is damaged and hard to repaire, it will lead to the interruption of traffic and transportation. Also it is a serious impediment to the relief work after the disaster. Therefore, it is necessary to operate static and dynamic finite element analysis combine with effective anti-seismic measures for the long span bridges with high pier to ensure the safety of strcture in the earthquake. At the same time, it had great significance on the economic development.Based on Qingling River Bridge of Chengdu-Kunming double-line Railway, this paper analyzed the dynamic characteristics and seismic response combine with conventional stress analysis, spectral analysis and time-history analysis method. The main work of this paper is as follows:1. Based on the relevant information at home and abroad, this paper introduced the development situation, design method and seismic analysis method of continuous rigid frame bridge and its own characteristics.2. The conventional design and static analysis of Qingling River Bridge were presented. The mechanical characteristics of such bridges were summarized.3. Based on the dynamic characteristics and some related theories, the response of Qingling River Bridge under the low-level earthquake and high-level earthquake were analysed by using the spectrum and time-history analysis method. The mechanical characteristics of the main pier were obtained. On the basis of above all works, the seismic response results of main pier of the bridge were checked to ensure the safety of the strcture through earthquake. And also to ensure that all the targets of this bridge in cases of the low-level earthquake and high-level earthquake were meeting the requirements of standards. Finally, all the calculation and analysis in this paper can provide a reference for related bridges.