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Dynamic Response of Bridges and its Effect on Soil Medium

Kashmira Ajay Puranik, P.S. Bhalage, A.B. Vawhale, N.S. Vaidkar

Abstract


The analysis of dynamic behaviour of bridge structures that are subjected to moving loads has been one of the research benefits in recent years. Specifically in railway bridges, resonance ensues when the load frequency is equal to a multiple of natural frequency of the structure. Resonance vibrations have been practical in railway bridges, especially subjected to high-speed lines. They are caused primarily because of two reasons: one is the repeated application of axle loads and second is the speed of the train itself. When a bridge is subjected to the moving loads of a high-speed train, the dynamic response of the structure is inclined by the soil lying beneath the foundations and surrounding the bridge. The main objective of this study is to analyze the dynamic response of types of bridges and the underlying soil under traffic. This is achieved by modelling a 3D model and analyzing this model for moving loads. The response of the soil medium lying beneath and around the source is practical by boundary element analysis method. Four types of soil conditions were examined infinitely: stiff soil, stiff soil, hard soil and soft soil. The results are shown at the culmination of this work.

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References


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DOI: https://doi.org/10.37628/jsea.v5i1.419

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