CUED Publications database

Base-isolated buildings and the added-mass effect

Talbot, JP and Hamad, WI and Hunt, HEM (2014) Base-isolated buildings and the added-mass effect. In: UNSPECIFIED pp. 943-954..

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Base isolation of buildings is well established as one of the most effective means of limiting the disturbance caused by ground-borne vibration from sources such as roads and railways. The technique involves inserting either laminated rubber bearings or steel springs between a building and its foundation, to reduce the internal levels of perceptible vibration and re-radiated noise. One of the primary limitations of simple models of base-isolated buildings is the lack of any consideration of soil-structure interaction effects. This paper considers one such effect, which may be termed the added-mass effect. By investigating a range of models, of increasing complexity, the paper considers the influence of a building on the ground vibration field. It is demonstrated that pre- and post-construction vibration levels in the ground can be quite different over the frequency range of interest, a conclusion that is supported by experimental observations. It is concluded that a proper accounting for this effect is essential to draw meaningful conclusions on isolation performance.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:45
Last Modified: 22 May 2018 06:24