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JDR Vol.12 No.1 pp. 79-89
(2017)
doi: 10.20965/jdr.2017.p0079

Paper:

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Damage Assessment of Road Bridges Subjected to the 2011 Tohoku Pacific Earthquake Tsunami

Gaku Shoji*,† and Tomoharu Nakamura**

*Division of Engineering Mechanics and Energy, Faculty of Engineering, Information and Systems, University of Tsukuba
1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

†Corresponding author

**Former Graduate Student, Graduate School of Systems and Information Engineering, University of Tsukuba, Ibaraki, Japan

Received:
August 11, 2016
Accepted:
December 8, 2016
Published:
February 1, 2017
Creative Commons License
Keywords:
the 2011 Tohoku Pacific Earthquake Tsunami, road bridge, inundation depth, damage function, the Nankai Trough earthquake tsunami
Abstract
The authors assessed the tsunami damage to a girder-type road bridge, focusing on a washed-away deck that failed during the 2011 Tohoku Pacific earthquake tsunami. The inundation depth, ratio of inundation depth to girder elevation, and flow velocity were used as the three indices of the tsunami wave load acting on a road bridge deck. A gently shaped tsunami waveform was selected at a wave-front with a water surface level increase rate of less than 2.0 m/min. The damage ratio was computed for the above three indices, as defined by the number of washed-away bridges divided by the total number of bridges exposed to the tsunami. Based on statistical analysis for the damage ratio data, damage functions using the three indices were proposed. In addition, the spatial distribution of physical wash-away damage to road bridges by the anticipated Nankai Trough earthquake tsunami was shown by applying the derived damage functions.
Cite this article as:
G. Shoji and T. Nakamura, “Damage Assessment of Road Bridges Subjected to the 2011 Tohoku Pacific Earthquake Tsunami,” J. Disaster Res., Vol.12 No.1, pp. 79-89, 2017.
Data files:
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