Numerical Study of the Seismic Behaviour of Variable Friction Base Isolation Systems
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Bibliographic Details
| Author(s): |
Paolo M. Calvi
(University of Washington, Seattle, WA, USA)
Sandip Timsina (University of Washington, Seattle, WA, USA) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Engineering the Future, Vancouver, Canada, 21-23 September 2017 | ||||
| Published in: | IABSE Symposium Vancouver 2017 | ||||
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| Page(s): | 2204-2211 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2017 | ||||
| DOI: | 10.2749/vancouver.2017.2204 | ||||
| Abstract: |
Variable Friction Systems (VFS) have been recently proposed as potential alternatives to traditional friction devices. VFS come with an extra design “degree of freedom”, in the form of coexisting multiple friction coefficients across the sliding surface, so that the properties of the base isolators can be adjusted to achieve enhanced seismic performance. In particular, the principal benefit of VFS is their capacity of dissipating a larger amount of energy with respect to their constant-friction counterparts, reducing the displacement demand on the system, and the lateral forces and accelerations transmitted to the isolated structure. This paper presents the results of more than 450,000 non-linear time history analyses, illustrating key differences in the response of VFS as a function of the systems’ properties and showing that generic VFS can be capable of high seismic performance. |
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| Keywords: |
time history base isolation friction pendulum Variable Friction Single Degree
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