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| Effect of Girder Vertical Deformation of Simply Supported Beam#br#
Bridges on the Running Properties of DoubleLane LightRail Train |
| WANG Shaojie1,3,XU Zhaodong1,LIU Fusheng2,LI Shu1,DYKE S J3 |
1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,
Southeast University, Nanjing 210096, China; 2. College of Water Conservancy and Civil
Engineering, Shandong Agricultural University, Tai’an 271018, Shandong, China;
3. School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA |
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Abstract Abstract： Based on the modeling theory of lightrail traintrackbridge (LTTB) system, a finite element (FE) model with consideration of girder deformation is established to perform analysis on dynamic behaviors of the multiple span girder bridge in the case of the doublelane trains passing through it. Factors such as nonlinearity of subsystem, wheeltruck contact and rail irregularities are also considered in this FE model. This model has unique merits of dynamic visual, high efficiency and rubust solutions. The offload factor, maximum acceleration of car body and Sperling index are employed to evaluate the performance of the running lightrail train. Besides, the interaction of running trains and girder deformation is investigated in detail. The results show that first, the running safety and stability of the train degenerate as the speed goes up. Then, the girder deformation leads to varying impacts on the running safety and stability of the train at the same train speed. For the case of the existing girder deformation, the running performance of the train is dominated by the factor of offload. Finally, when the train runs at not greater than 80km/h of the design speed, it can meet the requirements of running safety while the pier settlement is not more than 30mm or the deflection/camber of girder is not more than 20 mm.
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Published: 29 March 2017
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