State -of -the -Art and Development of Seismic Analysis for Complex Bridges

Abstract

Due to the complexity of dynamic response characteristics of complex bridges, it is difficult to give uniform regulations to give comprehensive and complete guidance for its seismic analysis. In order to promote the development of seismic analysis of complex bridges, the research status and progress of complex bridge seismic analysis were discussed in detail. Firstly, the characteristics of the commonly used seismic analysis methods for bridges and their applicability to complex bridges were summarized. Secondly, the selection and synthesis methods of far-field and near-field seismic used for bridge seismic analysis were concluded. Meanwhile, the seismic input methods and the most unfavorable input direction of curved bridges were discussed. Then, the anti-seismic analysis model of the main components of bridges were summed up, and the medium-structure interaction (including pile-soil-structure interaction, abutment-soil-structure interaction and water-structure interaction, etc.) were investigated. Finally, on this basis, the unsolved problems and the future development directions in this research field were pointed out. It is concluded that the seismic analysis of complex bridges still has some shortcomings, which needs to be improved and developed.