Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Study on the Mechanical Behavior of Shotcrete Lining with Yielding Support in Large Deformation Tunnel
Abstract The yielding support has proven to be one of the most effective measures to control the large deformation of the tunnel, as it could well stabilize tunnel support structure by releasing the deformation energy in the surrounding rock and exerting the self-supporting ability of the surrounding rock. To explore the damage mechanical behavior of shotcrete linings with yielding supports in large-deformation tunnels, an elastic–plastic damage model of concrete was developed, and a numerical method for simulating the yielding support based on the double-node beam element and interface element was proposed. Then, the influences of the position and resistance of the yielding element on the behaviors of shotcrete lining were analyzed and discussed. The results indicate that the position and resistance of the yielding element have a significant effect on the distribution of damage, principal stress, axial force, and bending moment of the lining. In the tunnel dominated by horizontal deformation, the yielding structure with constant resistance symmetrically arranged at the waist of the tunnel sidewall has the best yielding effect. The damage and maximum axial force are minimal, and the maximum bending moment is relatively large but lower than the maximum bending moment that the lining structure can bear. Assuming that the yielding element position stays the same, the maximum lining axial force rises with increasing yielding resistance, the maximum bending moment shows an initially upward and subsequently downward trend as the yielding resistance rises, and the maximum damage shows a trend of first declining and then growing as the yielding resistance rises. It is also found that the resistance of the yielding component should be controlled within a reasonable range, neither too small nor too large, for the lining to be in good working condition.
Highlights A new elastoplastic damage model was developed to describe the post-peak strain-softening behavior of concrete.A numerical realization approach for yielding support mechanical behavior was proposed.The mechanical behaviors of shotcrete lining with yielding support were numerically analyzed.
Numerical Study on the Mechanical Behavior of Shotcrete Lining with Yielding Support in Large Deformation Tunnel
Abstract The yielding support has proven to be one of the most effective measures to control the large deformation of the tunnel, as it could well stabilize tunnel support structure by releasing the deformation energy in the surrounding rock and exerting the self-supporting ability of the surrounding rock. To explore the damage mechanical behavior of shotcrete linings with yielding supports in large-deformation tunnels, an elastic–plastic damage model of concrete was developed, and a numerical method for simulating the yielding support based on the double-node beam element and interface element was proposed. Then, the influences of the position and resistance of the yielding element on the behaviors of shotcrete lining were analyzed and discussed. The results indicate that the position and resistance of the yielding element have a significant effect on the distribution of damage, principal stress, axial force, and bending moment of the lining. In the tunnel dominated by horizontal deformation, the yielding structure with constant resistance symmetrically arranged at the waist of the tunnel sidewall has the best yielding effect. The damage and maximum axial force are minimal, and the maximum bending moment is relatively large but lower than the maximum bending moment that the lining structure can bear. Assuming that the yielding element position stays the same, the maximum lining axial force rises with increasing yielding resistance, the maximum bending moment shows an initially upward and subsequently downward trend as the yielding resistance rises, and the maximum damage shows a trend of first declining and then growing as the yielding resistance rises. It is also found that the resistance of the yielding component should be controlled within a reasonable range, neither too small nor too large, for the lining to be in good working condition.
Highlights A new elastoplastic damage model was developed to describe the post-peak strain-softening behavior of concrete.A numerical realization approach for yielding support mechanical behavior was proposed.The mechanical behaviors of shotcrete lining with yielding support were numerically analyzed.
Numerical Study on the Mechanical Behavior of Shotcrete Lining with Yielding Support in Large Deformation Tunnel
Yang, Kai (Autor:in) / Yan, Qixiang (Autor:in) / Shi, Zhendong (Autor:in) / Zhang, Chuan (Autor:in) / Ma, Shuqi (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
Monocoque Tunnel Lining with Shotcrete
British Library Online Contents | 1996
HONG KONG - SHOTCRETE SUPPORT: Shotcrete as a permanent lining to a TBM tunnel
| Online Contents | 1997
Shotcrete as a tunnel lining - A laboratory study
| British Library Conference Proceedings | 1995
Reliability Analysis of Shotcrete Lining during Tunnel Construction
| British Library Online Contents | 2007