Mitigation of seismic pounding effect on bridges using dynamic restrainers

Masanobu Shinozuka; Maria Qing Feng; Je-Min Kim; Fumio Nagashima; HoKyung Kim

doi:10.1117/12.384579

27 April 2000 Mitigation of seismic pounding effect on bridges using dynamic restrainers

Masanobu Shinozuka, Maria Qing Feng, Je-Min Kim, Fumio Nagashima, HoKyung Kim

Proceedings Volume 3989, Smart Structures and Materials 2000: Damping and Isolation; (2000) https://doi.org/10.1117/12.384579
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

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.

Citation Download Citation

Masanobu Shinozuka, Maria Qing Feng, Je-Min Kim, Fumio Nagashima, and HoKyung Kim "Mitigation of seismic pounding effect on bridges using dynamic restrainers", Proc. SPIE 3989, Smart Structures and Materials 2000: Damping and Isolation, (27 April 2000); https://doi.org/10.1117/12.384579

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