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Simplifying assumptions in building models for base isolation performance prediction

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Base isolation is a vibration mitigation option for buildings near sources of ground-borne vibration, typically railways (surface or underground) and roads. One popular building model used for early-stage design of isolation is a single-degree-of-freedom mass-spring model, which fails to account for many important features of the system, among them soil-structure interaction. As such, recent research in Cambridge has sought to develop simple models which nevertheless take soil-structure interaction into account. Building on a reference tunnel-building-foundation reference model by others against which simple models can be compared, this talk examines the significance of the simplifying assumption that floors of the reference structure can be modelled using beams. The implications for simplified “dashpot” models, which model the building with semi-infinite columns, are discussed along with future opportunities for their development.

This talk is part of the Engineering - Dynamics and Vibration Tea Time Talks series.

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In person in the Max Perutz Lecture Theatre (CB2 0QH) and via Zoom Lecture Room 1, Department of Architecture, 1-5 Scroope Terrace, Cambridge Hicks Room, University Centre, Granta Place, Mill Lane, Cambridge CB2 1RU

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