TY - JOUR
T1 - Fragility curves based on data from the 2011 Tohoku-oki Tsunami in Ishinomaki City, with discussion of parameters influencing building damage
AU - Suppasri, Anawat
AU - Charvet, Ingrid
AU - Imai, Kentaro
AU - Imamura, Fumihiko
N1 - Funding Information:
The detailed building damage data used in this study were collected during the damage field survey of the 2011 Tohoku tsunami conducted by the Ministry of Land, Infrastructure, and Transport (MLIT) and were officially provided by Ishinomaki City. This research was partly funded by the Tokio Marine & Nichido Fire Insurance Co., Ltd., through the International Research Institute of Disaster Science (IRIDeS) at Tohoku University; the Willis Research Network (WRN), under the Pan-Asian/Oceanian tsunami risk modeling and mapping project; and the Ministry of Education, Culture, Sports, Science and Technology (MEXT). The authors greatly appreciate questions and comments from reviewers that helped to improve the manuscript.
Publisher Copyright:
© 2015, Earthquake Engineering Research Institute.
PY - 2015/5
Y1 - 2015/5
N2 - The 63,605 damaged buildings from the 2011 Tohoku-oki tsunami in Ishinomaki were used to develop 52 fragility curves using linear regression. The data comprise the damage level and the measured inundation depth for each building. In agreement with previous studies, the present results indicate that reinforced concrete and steel buildings with three stories or more perform better under tsunami loading. Performance with respect to their intended function was found to depend mainly on structural material. Moreover, based on Japan's design code for earthquake-resistant buildings, buildings constructed after 1981 do not display a better performance compared to more recent constructions. Finally, the results show that for the same inundation depth, a higher damage probability exists along a ria coast due to higher flow velocities, confirmed by numerical simulation and survivor videos. These new findings are useful for building damage assessment, town reconstruction, and comparison of vulnerability functions in future studies.
AB - The 63,605 damaged buildings from the 2011 Tohoku-oki tsunami in Ishinomaki were used to develop 52 fragility curves using linear regression. The data comprise the damage level and the measured inundation depth for each building. In agreement with previous studies, the present results indicate that reinforced concrete and steel buildings with three stories or more perform better under tsunami loading. Performance with respect to their intended function was found to depend mainly on structural material. Moreover, based on Japan's design code for earthquake-resistant buildings, buildings constructed after 1981 do not display a better performance compared to more recent constructions. Finally, the results show that for the same inundation depth, a higher damage probability exists along a ria coast due to higher flow velocities, confirmed by numerical simulation and survivor videos. These new findings are useful for building damage assessment, town reconstruction, and comparison of vulnerability functions in future studies.
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U2 - 10.1193/053013EQS138M
DO - 10.1193/053013EQS138M
M3 - Article
AN - SCOPUS:84964078923
VL - 31
SP - 841
EP - 868
JO - Earthquake Spectra
JF - Earthquake Spectra
SN - 8755-2930
IS - 2
ER -