Coupled vibration analysis of railway continuous rigid-frame bridge and vehicles with soil-structure interaction

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (12) : 54-58.

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Coupled vibration analysis of railway continuous rigid-frame bridge and vehicles with soil-structure interaction

LI Xiao-zhen，LIU Xiao-han，LIU De-jun

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Abstract

The effect of soil-structure interaction on the coupled vibration of continuous rigid-frame bridges and vehicles under high speed vehicle load was discussed. With BDAP V2.0(Bridge Dynamic Analysis Program), the natural frequencies and dynamic responses of the bridge under vehicle load are calculated by using a new bridge model(whole-pile model), which can take account of the interaction of lateral displacement and bending angle on group-piles. Comparing with commonly used consolidation model and equivalent-stiffness model, the dynamic response of bridge, especially the lateral dynamic response, varies a lot by considering soil-structure interaction. While the maximum dynamic accelerations get lower, the maximum dynamic displacements become much higher, the maximum error reaches 31%. For a high speed railway bridge located in soft ground with high-pile cap foundation, whole-pile model is proposed to analysis the coupled vibration of vehicle and bridge.

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soil-structure dynamic interaction / vehicle-bridge coupled vibration / dynamic response / rigid-frame bridge

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LI Xiao-zhen;LIU Xiao-han;LIU De-jun. Coupled vibration analysis of railway continuous rigid-frame bridge and vehicles with soil-structure interaction[J]. Journal of Vibration and Shock, 2011, 30(12): 54-58