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JDR Vol.14 No.2 pp. 269-278
(2019)
doi: 10.20965/jdr.2019.p0269

Paper:

Development of a Seismic-Performance Assessment Method and Retrofitting Technology Against the Liquefaction of Existing Bridges

Michio Ohsumi, Toshiaki Nanazawa, Shunsuke Tanimoto, and Mitsuhiko Nakata

Center for Advanced Engineering Structural Assessment and Research, Public Works Research Institute
1-6 Minamihara, Tsukuba, Ibaraki 305-8516, Japan

Corresponding author

Received:
August 3, 2018
Accepted:
December 5, 2018
Published:
March 1, 2019
Keywords:
liquefaction, bridge foundations, retrofitting technology, seismic performance assessment
Abstract

In the past, earthquakes have caused critical damage to bridges built on liquefiable ground, resulting in their collapse or long-term closures. In particular, for existing bridges designed in an age when the liquefaction influence was not considered, appropriate measures should be taken as necessary. However, there are many existing stocks of bridges, which require expensive foundation reinforcement. Therefore, it is crucial to appropriately choose bridge foundations for which anti-seismic measures are a high priority and implement the measures efficiently and successively. The present study aims to develop a seismic-performance assessment method and retrofitting technology for coping with liquefiable ground. For this purpose, a large shaking-table experiment was conducted to determine the effects of the liquefiable ground on bridge-foundation behavior and verify the effect of the retrofitting technology. Based on disaster-case analyses and the results of the shaking-table experiment, a seismic-performance assessment method applicable to practical designing was proposed.

Cite this article as:
M. Ohsumi, T. Nanazawa, S. Tanimoto, and M. Nakata, “Development of a Seismic-Performance Assessment Method and Retrofitting Technology Against the Liquefaction of Existing Bridges,” J. Disaster Res., Vol.14, No.2, pp. 269-278, 2019.
Data files:
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Last updated on Mar. 25, 2019