TY - GEN
T1 - Fundamental study on liquefaction strength of volcanic ash soil during the 2016 kumamoto earthquake
AU - Ogo, K.
AU - Hazarika, H.
AU - Phyo, M. M.P.
AU - Kokusho, T.
AU - Ishibashi, S.
AU - Yamamoto, S.
AU - Matsumoto, D.
N1 - Publisher Copyright:
© 2019 Associazione Geotecnica Italiana, Rome, Italy.
PY - 2019
Y1 - 2019
N2 - In April, 2016, two consecutive earthquakes registering 7 on Japanese scale occurred within 28 hours during the 2016 Kumamoto Earthquake, and caused liquefaction in many places around Kumamoto Plain. However, considering the magnitude and the distance from the hypocenter, the liquefaction-induced damage was not serious. Most of sand boiling was observed in places with higher likelihood of liquefaction such as near waterfront and on old river channels. In addition, black sand which seems to be of volcanic origin was observed as ejecta of liquefaction in many places. Therefore, cyclic triaxial tests were conducted to understand the relatively low liquefaction susceptibility on volcanic ash soil from Kumamoto by borehole sampling. Intact specimens were tested to evaluate the ageing effect in comparison with corresponding reconstituted specimens. Dissipated energy during cyclic loading was focused here as well as CRR to highlight the difference of liquefaction strength between the two kinds of specimens.
AB - In April, 2016, two consecutive earthquakes registering 7 on Japanese scale occurred within 28 hours during the 2016 Kumamoto Earthquake, and caused liquefaction in many places around Kumamoto Plain. However, considering the magnitude and the distance from the hypocenter, the liquefaction-induced damage was not serious. Most of sand boiling was observed in places with higher likelihood of liquefaction such as near waterfront and on old river channels. In addition, black sand which seems to be of volcanic origin was observed as ejecta of liquefaction in many places. Therefore, cyclic triaxial tests were conducted to understand the relatively low liquefaction susceptibility on volcanic ash soil from Kumamoto by borehole sampling. Intact specimens were tested to evaluate the ageing effect in comparison with corresponding reconstituted specimens. Dissipated energy during cyclic loading was focused here as well as CRR to highlight the difference of liquefaction strength between the two kinds of specimens.
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M3 - Conference contribution
AN - SCOPUS:85081173393
SN - 9780367143282
T3 - Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
SP - 4187
EP - 4194
BT - Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
A2 - Silvestri, Francesco
A2 - Moraci, Nicola
PB - CRC Press/Balkema
T2 - 7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019
Y2 - 17 January 2019 through 20 January 2019
ER -