TY - JOUR
T1 - Numerical Analysis of Segmental Tunnel Linings employing a Hybrid Modeling Approach
AU - Granitzer, Andreas-Nizar
AU - Tschuchnigg, Franz
PY - 2021/1/10
Y1 - 2021/1/10
N2 - The structural performance of shield-driven tunnel linings is considerably affected by the existence of segmental joints. Nevertheless, segmental tunnel linings are commonly modelled as isotropic structures in engineering practice, thereby ignoring the joint-induced stiffness reduction in numerical analysis. A more realistic approach is to consider the tunnel structure as continuous ring with adjusted rigidities which is also referred to as indirect-joint model. However, this modeling approach is a complicated task since it requires the definition of anisotropic stiffness parameters. In this context, the present paper introduces a hybrid modeling approach, which combines analytical solutions and numerical studies. Based on extensive numerical studies, anisotropic stiffness parameters are defined to model an existing drainage tunnel (SDT). Finally, a case study is discussed, where the developed indirect-joint model is used to investigate the structural response of the SDT. In this context, particular emphasis is placed on the deformation of the tunnel crown developing throughout the entire construction phase.
AB - The structural performance of shield-driven tunnel linings is considerably affected by the existence of segmental joints. Nevertheless, segmental tunnel linings are commonly modelled as isotropic structures in engineering practice, thereby ignoring the joint-induced stiffness reduction in numerical analysis. A more realistic approach is to consider the tunnel structure as continuous ring with adjusted rigidities which is also referred to as indirect-joint model. However, this modeling approach is a complicated task since it requires the definition of anisotropic stiffness parameters. In this context, the present paper introduces a hybrid modeling approach, which combines analytical solutions and numerical studies. Based on extensive numerical studies, anisotropic stiffness parameters are defined to model an existing drainage tunnel (SDT). Finally, a case study is discussed, where the developed indirect-joint model is used to investigate the structural response of the SDT. In this context, particular emphasis is placed on the deformation of the tunnel crown developing throughout the entire construction phase.
KW - 3D finite-element analysis
KW - Tunnel
KW - Segmental lining
KW - Joint stiffness
KW - Tunnel heave
UR - http://www.jcepm.com/article_122041.html
U2 - 10.22115/CEPM.2021.247314.1130
DO - 10.22115/CEPM.2021.247314.1130
M3 - Article
SN - 2588-6959
VL - 4
SP - 1
EP - 18
JO - Computational Engineering and Physical Modeling
JF - Computational Engineering and Physical Modeling
IS - 1
ER -