Abstract：Research purposes: In the light of the natural environment conditionts of the bridge site，the prestressed concrete continuous girder bridge with span arrangement of ( 60 + 7 × 100 + 60) m was adopted for the main bridge of Minjiang River Bridge of the Xiangtang － Puian Railway． A variable cross section box girder with single box，single chamber and vertical webs was adopted for the main girder of the main bridge with three － way prestresssing system． The piers of the main bridge were designed as the round － end solid piers，resting on the bored pile foundations． The softwares were used to analyze the plane static force，the seismic design of the main bridge structure，the train － bridge dynamic responses and the calculation of the braking force on deck of the bridge for providing the basis for the bridge design． The research results can be as the reference to the similar bridges．
Research conclusions: The normal stress in top and bottom slabs of the girders and the shear force in weds could meet the relevant requirements in the codes． After adding the viscous dampers on the No． 38 and No． 40 piers，the structure could meet the seismic requirements． The main bridge structure had good dynamics with good traveling capacity for the train and it could meet the demands of the train running safety and passenger comfortableness．
蔡华炳. 向莆铁路闽江特大桥主桥设计[J]. 铁道工程学报, 2012, 29(7): 19-23.
CAI Hua － bing. Design of Main Bridge of Minjiang River Bridge of Xiangtang － Putian Railway. 铁道工程学报, 2012, 29(7): 19-23.
China Railway Siyuan Survey and Design Group Co．Ltd． Construction Drawings of Project of Minjiang River Bridge on Xiangpu Railway［Z］． Wuhan: China Railway Siyuan Survey and Design Group Co． Ltd，2009．
Nanjing Hydraulic Research Institute． Report of Study on Bridge Navigation Clearance Dimension and Technical Specification of Minjiang River Bridge on Xiangpu Railway ［R］． Nanjing: Nanjing Hydraulic Research Institute ， 2007．
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TB 10002． 3—2005，Code for Design on Reinforced and Prestressed Concrete Structure of Railway Bridge and Culvert［S］．
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Railway Construction Letter［2005］No． 285，Interim Design Provisions for a New 200 km/h Mixed Passenger and Freight Railway［S］．
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Major Bridge Engineering Bureau， the Ministry of Railways． Technical Sumnary of the Second Qiantangjiang River Bridge ［M］． Wuhan: Press of Wuhan University of Geodesy and Geomatics Science and Technology，1995．
China Railway Siyuan Survey and Design Group Co．Ltd． Analysis Report of Seismic Research of Minjiang River Bridge on Xiangpu Railway［R］． Wuhan: China Railway Siyuan Survey and Design Group Co． Ltd，2009．
Zeng Qingyuan， Guo Xiangrong． Theory and Application of Vibration Analysis on Train － bridge Time － varying System［M］． Beijing: China Railway Publishing House，1999．
Fang Shujun，Li Dejian，Zeng Qingyuan． Stochastic Space Vibration Analysis of Train － bridge Time －varying System a Three － track Railroad Prestressed Concrete Continuous Bridge［J］． Journal of Central South University( Science and Technology) ，2008 ( 2) :394 － 399．
Zeng Qingyuan，Yang Ping． The“Set － in － Right －Position”Rule for Forming Structural Matrices and the Finite Truss － Element Method for Space Analysis of Truss Bridges ［J］． Journal of the China RailwaySociety，1986 ( 2) : 48 － 59．
Central South University． Analysis Report of Dynamic and Train Traveling Capacity of the Four Especial Structure Bridges on Xiangpu Railway［R］． Changsha:Central South University， 2010．
2012, Vol. 29 
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