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| Study on Measures for Decreasing Forces on Track Structure at Girder End |
| Shen Lei |
| China Railway Siyuan Survey and Design Group Co．Ltd，Wuhan，Hubei 430063，China |
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Abstract Research purposes: There are some large beam crevices and long cantilevers of several particular bridges like Tingsihe Bridge on Wuhan—Guangzhou Passenger Dedicated Line．The uplift force of the rail fastening system for ballasdess track at the end of long—pan girder may become larger than clamping force when the bridge girder end deforms．It affects the passengers7comfortableness，even makes a threat to the safety of railway traffic．A feasible design scheme based on some researches is offered to solve the problem of the forces on the track structure at the end of the girder．
Research conclusions: The transitional slab is installed at the girder joint at the end of the girder to reduce force on the ballasfless track and the model for the transitional slab structure is establish to analyze the difference between the force on the track structure with transitional slab and the force on that without transitional slab under the conditions of girder ration angel and vertical relative displacement of bridge on both sides of the girder joint．The result shows that using the transitional slab Can reduce the maximum pressure and tension of rail fastening and the rail additional moment by 20％—80％．So using the transitional slab at the girder end Can reduce force on the track structure at the end of girder so as to ensure normal operation of ballastless track．
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Received: 20 March 2010
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2010, Vol. 27 
