Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Computational Modeling of Underground Tunnels in Intact and Jointed Rock
Computational models were developed to predict the dynamic response and damage to reinforced tunnels in rock subjected to ground shock from nuclear weapons. This effort is part of the Underground Technology Program. The finite element calculations were performed with the DYNA3D code using a comprehensive smooth-cap model for intact rock and a nonlinear slideline model for rock joints. Calculated tunnel closures, and free-field stress and velocity histories, compare well with spherical wave tests (SWAT) on aluminum lined tunnels in intact limestone. The intact rock model includes a scalar anisotropic damage formulation for modeling strain-softening and modulus reduction, viscoplastic formulations and rate-shifted damage surfaces for modeling rate effects, and a three-invariant plasticity formulation. Preliminary stack of bricks calculations were also performed to verify our joint model, in preparation for future predictions of tunnel response in jointed limestone.
Computational Modeling of Underground Tunnels in Intact and Jointed Rock
Computational models were developed to predict the dynamic response and damage to reinforced tunnels in rock subjected to ground shock from nuclear weapons. This effort is part of the Underground Technology Program. The finite element calculations were performed with the DYNA3D code using a comprehensive smooth-cap model for intact rock and a nonlinear slideline model for rock joints. Calculated tunnel closures, and free-field stress and velocity histories, compare well with spherical wave tests (SWAT) on aluminum lined tunnels in intact limestone. The intact rock model includes a scalar anisotropic damage formulation for modeling strain-softening and modulus reduction, viscoplastic formulations and rate-shifted damage surfaces for modeling rate effects, and a three-invariant plasticity formulation. Preliminary stack of bricks calculations were also performed to verify our joint model, in preparation for future predictions of tunnel response in jointed limestone.
Computational Modeling of Underground Tunnels in Intact and Jointed Rock
Y. D. Murray (Autor:in)
1997
59 pages
Report
Keine Angabe
Englisch
Civil Engineering , Soil & Rock Mechanics , Nuclear Explosions & Devices , Tunnels , Explosion effects , Geologic models , Finite element analysis , Dynamic response , Ground shock , Rock mechanics , Scalar functions , Reinforcing materials , Nuclear explosion damage , Cavity liners , Spherical waves , Intact rock , Jointed rock , Dyna3d computer program
Pressure Tunnels in Jointed Underground Medium
| British Library Conference Proceedings | 2003
Modeling underground structure vulnerability in jointed rock
| British Library Conference Proceedings | 2001
Behaviour of Tunnels in Jointed Rock Mass
| British Library Conference Proceedings | 2006
Seismic Response of Circular Tunnels in Jointed Rock
| Online Contents | 2018
Load approach on circular tunnels in jointed rock
| British Library Conference Proceedings | 1998