| Nowadays,the pace of China’s economic development is still accelerating,It is bound to require that the flow of people logistics and information must sync up among with regions even neighboring countries.Application of technology of heavy haul railway is the ideal choice of logistics transportation,therefor to develop heavy haul railway transportation is a pressing matter in the field of railway transportation in China.so that,to carry out the seismic study of the aspects of heavy haul railway bridge is of paramount importance.The main work of the study is carried out in the following steps: Firstly,based on the Bridge Engineering——Grain transporting river of family zhu Bridge which located in the part of the north of Suning to Huanghua of the heavy haul railway line of Shuo-huang,establish Open Sees structure model considering heavy haul train load.Secondly,understand the geological information of bridge site by drawings and consult the document of "Code for seismic design of Railway Engineering" and "zoning map of earthquake motion in China" to make sure the land type of Bridge site and Characteristic period of ground motion.These data is conducive to select Ground motion function.The third step,the seismic simulation of bridge structure.There are three kinds of factors involved in the simulation of seismic ground motion,such as multiple excitation directions of ground motions,various vibration levels and different train loads,to evaluate seismic performance of heavy load railway bridge in multi angle.Finally,aiming at the deficiency of the existing bridge structure in the area of seismic performance,this paper puts forward the structure improvement scheme of installing the seismic isolation support.and then two further optimization schemes are proposed:special setting parameters in isolation and reduction of support on side pier and steel plate reinforcement for side pier.Applicat two scheme of the structure improvement and further optimization comprehensively to investigate the effect of seismic reduction and disaster reduction of curved railway bridge under heavy load.In this paper,we refer to the previous researching results and researching methods of Railway Bridges to carry out the evaluation and Research on seismic performance of heavy load railway bridge,so that,providing reference for the research of similar aspects in bridge seismic. |
