Influence of Mullins and hardening effects of seismic isolation rubber bearings on the seismic response
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Bibliographic Details
| Author(s): |
Hiroshi Shimmyo
(Kawakin Core-Tech Co., Ltd. Saitama, Japan)
Tolga Onal (Kawakin Core-Tech Co., Ltd. Saitama, Japan) Shozo Nakamura (Nagasaki University, Nagasaki, Japan) Kazuya Tokunaga (Nagasaki University, Nagasaki, Japan) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021 | ||||
| Published in: | IABSE Congress Ghent 2021 | ||||
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| Page(s): | 1444-1452 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/ghent.2021.1444 | ||||
| Abstract: |
In the current Specifications for Highway Bridges of the Japan Road Association, a bilinear force- displacement relationship is recommended as the hysteresis loops of the seismic isolation rubber bearings for the dynamic structural analysis of seismically isolated bridges. However, it has been confirmed that the restoring force characteristics of the actual devices are different from the bilinear model due to the Mullins effect and the hardening phenomenon of the rubber under large shear strains. In this study, the effect of these two factors on the seismic response of a bridge is investigated through the dynamic analysis with the tri-linear double target model considering the factors. The parameters of the model are obtained from product test results of lead-plugged laminated rubber bearings and high-damping laminated rubber bearings. |
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| Keywords: |
hardening earthquake response restoring force characteristics seismic isolation rubber bearing Mullins effect
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| Copyright: | © 2021 International Association for Bridge and Structural Engineering (IABSE) | ||||
| License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |
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