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Mitigation of seismic pounding effect on bridges using dynamic restrainers
The present paper proposes the retrofit use of dynamic restrainers at the expansion joint for preventing the collapse of bridges in the event of a severe earthquake. The proposed dynamic restrainer consists of a nonlinear viscous damper and an elastic spring connected in parallel. Two-dimensional nonlinear finite element analysis using bilinear hysteretic models for RC bridge substructure joints and nonlinear gap elements for expansion joints is performed on example bridges with one or two expansion joints. The numerical simulation study indicates that the dynamic restrainers are substantially effective in reducing the relative opening displacements and impact forces due to pounding at the expansion joints. It is also found that the dynamic restrainer can be installed at expansion joint in abutment as well as between adjacent bridge frames to avoid a possible increase of ductility demands in the bridge substructures.
Mitigation of seismic pounding effect on bridges using dynamic restrainers
The present paper proposes the retrofit use of dynamic restrainers at the expansion joint for preventing the collapse of bridges in the event of a severe earthquake. The proposed dynamic restrainer consists of a nonlinear viscous damper and an elastic spring connected in parallel. Two-dimensional nonlinear finite element analysis using bilinear hysteretic models for RC bridge substructure joints and nonlinear gap elements for expansion joints is performed on example bridges with one or two expansion joints. The numerical simulation study indicates that the dynamic restrainers are substantially effective in reducing the relative opening displacements and impact forces due to pounding at the expansion joints. It is also found that the dynamic restrainer can be installed at expansion joint in abutment as well as between adjacent bridge frames to avoid a possible increase of ductility demands in the bridge substructures.
Mitigation of seismic pounding effect on bridges using dynamic restrainers
Shinozuka, Masanobu (author) / Feng, Maria Q. (author) / Kim, Je-Min (author) / Nagashima, Fumio (author) / Kim, HoKyung (author)
Smart Structures and Materials 2000: Damping and Isolation ; 2000 ; Newport Beach,CA,USA
Proc. SPIE ; 3989
2000-04-27
Conference paper
Electronic Resource
English
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