TY - GEN
T1 - Evaluation of constitutive law applicability for the ground improvement by jet grouting
AU - Kawamura, J.
AU - Iguchi, Y.
AU - Namikawa, T.
AU - Takehara, K.
AU - Yamada, T.
AU - Ohno, S.
N1 - Publisher Copyright:
© 2019 Associazione Geotecnica Italiana, Rome, Italy.
PY - 2019
Y1 - 2019
N2 - Ground improvement based on the introduction of a lattice structure by jet grouting is widely adopted to prevent seismic liquefaction phenomena. Conventional design prescribes that the allowable stress of an improved body should remain within the range of elastic behavior during an earthquake, but the characteristics of phenomena associated with improved ground after earthquake-related failure remain unclear. Against this background, Namikawa and Mihira (2007) proposed an elasto-plastic constitutive law capable of expressing strain-softening/hardening response after tensile and shear failure. In the present study, the authors simulated an unconfined compression test with a previously described elasto-plastic model for large-scale core sampling of a body improved via jet grouting to verify the model’s applicability. FEM analysis was subsequently conducted to evaluate the resistance of improvement based on a lattice structure with local failure against a strong earthquake.
AB - Ground improvement based on the introduction of a lattice structure by jet grouting is widely adopted to prevent seismic liquefaction phenomena. Conventional design prescribes that the allowable stress of an improved body should remain within the range of elastic behavior during an earthquake, but the characteristics of phenomena associated with improved ground after earthquake-related failure remain unclear. Against this background, Namikawa and Mihira (2007) proposed an elasto-plastic constitutive law capable of expressing strain-softening/hardening response after tensile and shear failure. In the present study, the authors simulated an unconfined compression test with a previously described elasto-plastic model for large-scale core sampling of a body improved via jet grouting to verify the model’s applicability. FEM analysis was subsequently conducted to evaluate the resistance of improvement based on a lattice structure with local failure against a strong earthquake.
UR - http://www.scopus.com/inward/record.url?scp=85081176030&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85081176030&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85081176030
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 - 3242
EP - 3249
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 -