Abstract
A base-isolated building is unusual in that its frequencies in both horizontal directions are the same or very nearly the same because of the isotropic response of the isolators. The torsional frequency can be close to the horizontal frequencies if the stiffness of an isolator is matched to the load on that isolator, raising the possibility of a coupling between the three lowest modes if there is an imbalance between the center of mass and the center of rigidity.
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© 1997 Springer-Verlag London Limited
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Kelly, J.M. (1997). Coupled Lateral-Torsional Response of Seismically Isolated Buildings. In: Earthquake-Resistant Design with Rubber. Springer, London. https://doi.org/10.1007/978-1-4471-0971-6_6
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DOI: https://doi.org/10.1007/978-1-4471-0971-6_6
Publisher Name: Springer, London
Print ISBN: 978-1-4471-1247-1
Online ISBN: 978-1-4471-0971-6
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