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Soil-structure interaction and the added-foundation effect of surface foundations with application to groundborne vibration in buildings

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Sanitate, G 
Talbot, JP 

Abstract

Ground-borne vibration and re-radiated noise are an important design consideration for many modern buildings that are close to railways. The induced vibration field may be assumed as an incoming wavefield. The response of the soil-foundation-building system can be then obtained in two stages with reference to the sub-modelling technique. This paper refers to the first stage that is associated with the modification of the free-field vibration due to the coupling of a foundation to the ground (i.e. added-foundation effect). Here, the foundation model consists of a series of rigid regions representing the subsequent coupling points with a building. Iguchi's method is investigated as a simplified procedure to obtain the response of surface rigid foundations resting on a homogeneous and elastic half-space subjected to incoming plane wavefields. The case of rigid footings on an elastic layer overlying the half-space (i.e. slab foundation) is also investigated. The results obtained with Iguchi's method and the rigorous boundary-element model are in good agreement.

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Proceedings of ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics

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