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Proceedings Paper

Mitigation of seismic pounding effect on bridges using dynamic restrainers
Author(s): Masanobu Shinozuka; Maria Qing Feng; Je-Min Kim; Fumio Nagashima; HoKyung Kim
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Paper 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.

Paper Details

Date Published: 27 April 2000
PDF: 11 pages
Proc. SPIE 3989, Smart Structures and Materials 2000: Damping and Isolation, (27 April 2000); doi: 10.1117/12.384579
Show Author Affiliations
Masanobu Shinozuka, Univ. of Southern California (United States)
Maria Qing Feng, Univ. of California/Irvine (United States)
Je-Min Kim, Yosu National Univ. (South Korea)
Fumio Nagashima, Tokyo Metropolitan Univ. (Japan)
HoKyung Kim, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 3989:
Smart Structures and Materials 2000: Damping and Isolation
T. Tupper Hyde, Editor(s)

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