Seismic Response Assessment of Base-Isolated Bridges accounting for the Stress-Softening Behaviour of High Damping Natural Rubber Bearings

2015 ◽  
Author(s):  
E. Tubaldi ◽  
H. Ahmadi ◽  
A. Muhr ◽  
L. Ragni ◽  
A. Dall'Asta
Keyword(s):  
Natural Rubber ◽  
Seismic Response ◽  
Response Assessment ◽  
Stress Softening ◽  
Softening Behaviour ◽  
Rubber Bearings ◽  
Isolated Bridges

Influence of Mullins and hardening effects of seismic isolation rubber bearings on the seismic response

2021 ◽  
Author(s):  
Hiroshi Shimmyo ◽  
Tolga Onal ◽  
Shozo Nakamura ◽  
Kazuya Tokunaga
Keyword(s):  
Seismic Response ◽  
Seismic Isolation ◽  
Hysteresis Loops ◽  
Highway Bridges ◽  
Restoring Force ◽  
Two Factors ◽  
Product Test ◽  
Rubber Bearings ◽  
Isolated Bridges ◽  
Force Displacement

<p>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.</p>

Seismic Response Analyses of Isolated Bridges with Different Isolation Bearings

2012 ◽  
Vol 446-449 ◽  
pp. 1132-1137
Author(s):  
Shuai Wang ◽  
Liu Han Wen Heisha ◽  
Fang Yu ◽  
Guo Xiang Wang
Keyword(s):  
Seismic Response ◽  
Isolated Bridges
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