Relative Displacement Method for Track-Structure Interaction

Schanack, Frank; Ramos, Óscar Ramón; Reyes, Juan Patricio; Pantaleón, Marcos J.

doi:10.1155/2014/397515

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…5,6 Research can be conducted from two general aspects to investigate the influence of bridge deformation on track structures. The static and dynamic effects on the track structure through the bridge-track interface have been studied by focusing on the structural force, 7,8 the trackbridge deformation coordination relationship, 9,10 or the mapping relationship between the bridge and track to calculate the external track irregularities. [11][12][13] In addition, the deformation of the bridge would involve the train-trackbridge dynamic interaction system.…”

Section: Introductionmentioning

confidence: 99%

Static and dynamic effects of train-track-bridge system subject to environment-induced deformation of long-span railway bridge

Han

Zhu

Zhai

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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Laying ballastless tracks on a long-span railway bridge with a main span greater than 300 m is a challenge in engineering practice and has aroused significant concerns. Influenced by complicated environmental factors, long-span railway bridges in service deform with large amplitudes and complex shapes, which may result in damage to the track structure and threaten the running safety and ride comfort of trains. In this study, we investigate some typical statics and dynamics problems under the actual conditions of a long-span cable-stayed high-speed railway bridge with a main span of 400 m and laying ballastless track. The track-bridge finite element model and dynamic interaction model of the train-track-bridge system are first established. Furthermore, the influences of the complicated environment-induced bridge deformations are comprehensively investigated using the curvature method that reveals the deformation compatibility of the bridge-track system and indicates the dynamic interaction behavior of the train-track-bridge system subject to train running speeds and bridge deformations. Results indicate that excellent dynamic performance of the train-track-bridge system can be achieved by setting an elastic cushion of 0.1 N/mm3 under the track bed. Interface damage between track layers will not occur directly because of the complex deformations of the bridge decks. The bridge deformations induced by the environmental temperature and the concrete creep are qualified. The dynamic responses of the train-track-bridge system are also excellent under the excitations of bridge deformations. Dynamic simulations of the train-track-bridge system are proposed to evaluate long-span bridge deformations subject to complicated service situations in comparison with an oversimplified statics evaluation.

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Section: Introductionmentioning

confidence: 99%

Static and dynamic effects of train-track-bridge system subject to environment-induced deformation of long-span railway bridge

Han

Zhu

Zhai

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…8 Following two decades of development, thermal elasto-plastic theory has become increasingly mature and can now simulate the changes of the temperature field and stress-strain field throughout the welding process using iterative simulations. 9 However, the computational cost of thermal elasto-plastic analysis is quite high, especially for large and complex structures. However, computational costs can be greatly reduced by simplifying the model, heat source, and welding process, enabling the elasto-plastic analysis of welding deformation for large and complex structures.…”

Section: Introductionmentioning

confidence: 99%

Research on welding deformation for box girder of bridge crane based on thermal elasto-plastic theory

Tong

Zhuo

et al. 2018

Advances in Mechanical Engineering

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Cranes are mechanical devices widely used to hoist materials in engineering. The box girder of a bridge crane is formed by welding. During welding, residual stress and welding deformation will be inevitably generated due to the instantaneous hot temperature, which will affect not only the camber of the crane but also the operational performance of the traveling trolleys. Therefore, understanding the laws governing the welding deformation can lead to better control of camber cutting of the crane web to avoid unnecessary corrections, reasonably control the geometry shape of the girder and ensure the good operational performances of the trolleys. To achieve this goal, thermal elasto-plastic analysis method together with the Abaqus software is used to analyze the welding from the upper and lower covers to the web, from the upper and lower steel angles to the web, and from the web to the ribs. For the welding simulations, Gaussian movable heat sources, with the advantages of low computational cost, fast calculation speed, easy convergence, and a reasonable number of segments, are selected. The simulation results are compared with the experimental results to verify the reliability, accuracy, and efficiency of the numerical welding model. Finally, the simulation results are discussed, and design guidance for the web is proposed.

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“…Park et al [5] analyzed the factors influencing the serviceability of the concrete slab track rail fastening system during bridge end rotation and used parameter analysis to determine the influence degrees. Many studies considering track-bridge interaction have been performed to evaluate the serviceability at a railway bridge deck end [6][7][8]. Choi [9] used a continuous support model and a discrete support model to analyze the influence of rail support point spacing and rail fastener stiffness on the force acting on the rail support [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Analysis Method for Serviceability Investigation of Bridge Deck Ends with a Concrete Slab Track

Sung

2018

Advances in Civil Engineering

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In this study, a nonlinear analysis method was proposed to evaluate the serviceability review of a rail fastening system on concrete slab track at railway bridge ends. The serviceability review of the end deck is time-consuming in that it is necessary to calculate the force of fasteners; also, the design is complex because of the many girders, fasteners, and loads. In addition, there is also a case in which a special, expensive fastening device is installed because the stiffness of the rail fastening device is assumed to be linear, and excessive design results are produced by the linear analysis method. In this study, a clamping force test of the fastening system was performed to confirm the real stiffness and the force versus displacement relationship. The test results were applied in the conventional linear analysis method and the proposed nonlinear analysis method to a railway bridge model specimen with concrete slab tracks. The results of the nonlinear analysis method considering the nonlinear stiffness of the rail fastening system through the clamping force test confirmed that the uplift force acting on the rail fastener was considerably reduced compared with that in the linear analysis method.

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Relative Displacement Method for Track-Structure Interaction

Cited by 7 publications

References 6 publications

Static and dynamic effects of train-track-bridge system subject to environment-induced deformation of long-span railway bridge

Static and dynamic effects of train-track-bridge system subject to environment-induced deformation of long-span railway bridge

Research on welding deformation for box girder of bridge crane based on thermal elasto-plastic theory

Nonlinear Analysis Method for Serviceability Investigation of Bridge Deck Ends with a Concrete Slab Track

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