TY - GEN
T1 - Numerical analysis of a tunnel in swelling rockmass by a modified Cam-Clay based model
AU - Liu, Xiaodong
AU - Matsubara, Seishiro
AU - Yamada, Shotaro
AU - Kyoya, Takashi
N1 - Publisher Copyright:
© 2019 Japanese Society for Rock Mechanics
PY - 2019
Y1 - 2019
N2 - In the present study, a return mapping algorithm is formulated for an elasto-plastic swell model based on the Modified Cam-Clay(MCC) model, which can show the soft/hard behavior of swelling process by applying the finite element method (FEM). Several simple numerical examples are used to assess the efficiency and convergence of the formulation of the return mapping algorithm. This study is contributed to predicting the nonlinear mechanical response of the tunnel constructed in swelling rockmass, which contains the stress redistribution of the tunnel after excavation and the soft/hard response caused by swelling process. The numerical simulation will show the swell deformation, strain path and stress history of a tunnel which ground masses has occurred the process of water-absorption, aimed at evaluating the stability of a tunnel constructed in swelling rockmass after some years.
AB - In the present study, a return mapping algorithm is formulated for an elasto-plastic swell model based on the Modified Cam-Clay(MCC) model, which can show the soft/hard behavior of swelling process by applying the finite element method (FEM). Several simple numerical examples are used to assess the efficiency and convergence of the formulation of the return mapping algorithm. This study is contributed to predicting the nonlinear mechanical response of the tunnel constructed in swelling rockmass, which contains the stress redistribution of the tunnel after excavation and the soft/hard response caused by swelling process. The numerical simulation will show the swell deformation, strain path and stress history of a tunnel which ground masses has occurred the process of water-absorption, aimed at evaluating the stability of a tunnel constructed in swelling rockmass after some years.
KW - Modified Cam-Clay
KW - Return Mapping
KW - Soft/hard Response
KW - Swelling Rockmass
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M3 - Conference contribution
AN - SCOPUS:85088436667
T3 - 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
SP - 657
EP - 661
BT - 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
PB - International Society for Rock Mechanics and Rock Engineering
T2 - 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
Y2 - 1 December 2019 through 4 December 2019
ER -