Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
Online ISSN : 1883-8944
Print ISSN : 1884-2399
ISSN-L : 1883-8944
Paper
A PROPOSAL OF QUANTITATIVE EVALUATION METHOD ON TSUNAMI DAMAGE OF BUILDING IN CONSIDERATION OF COASTAL FOREST DISTRIBUTION AND TOPOGRAPHICAL CONDITION
Akihiro HAYASHIKei YAMASHITAFumihiko IMAMURA
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JOURNAL FREE ACCESS

2018 Volume 74 Issue 2 Pages I_235-I_240

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Abstract

 In this research, we proposed a method to quantitatively evaluate tsunami damage category of individual buildings in consideration of the distribution of coastal forests in the coastal plain, topographic conditions, and hydraulic parameters of the tsunami. In constructing the quantitative evaluation method, we used the building damage data at the Great East Japan Earthquake in 5 municipalities in Miyagi prefecture in the Sendai plain area. In this area, it was confirmed to reduce the tendency of the affected section of each structure type depending on the forest belt width of the coastal forest. Furthermore, we have constructed the quantitative evaluation formula using dimensionless variables expressing the presence of coastal forest, tsunami external force at building site, location / terrain gradient of each building, attenuation rate of tsunami force, which data is from the actual damage data and the tsunami numerical analysis. And we confirmed its statistical validity. By this method, we can quantitatively estimate the category of individual building damage even in other plain areas by obtaining target building structure, forest belt width of coastal forest, building altitude, tsunami hydraulic parameters.

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© 2018 by Japan Society of Civil Engineers
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