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Materials 2017, 10(6), 577; doi:10.3390/ma10060577

Influence of the Constitutive Model for Shotcrete on the Predicted Structural Behavior of the Shotcrete Shell of a Deep Tunnel

Unit for Strength of Materials and Structural Analysis, Institute of Basic Sciences in Engineering Science, Innsbruck University, Technikerstr. 13, Innsbruck A-6020, Austria
Current address: Brenner Basetunnel BBT SE, Innsbruck A-6020, Austria.
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Academic Editor: Miguel Cervera
Received: 14 April 2017 / Revised: 18 May 2017 / Accepted: 18 May 2017 / Published: 25 May 2017
(This article belongs to the Special Issue Computational Mechanics of Cohesive-Frictional Materials)
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Abstract

The aim of the present paper is to investigate the influence of the constitutive model for shotcrete on the predicted displacements and stresses in shotcrete shells of deep tunnels. Previously proposed shotcrete models as well as a new extended damage plasticity model for shotcrete are evaluated in the context of 2D finite element simulations of the excavation of a stretch of a deep tunnel by means of the New Austrian Tunneling Method. Thereby, the behavior of the surrounding rock mass is described by the commonly used Hoek–Brown model. Differences in predicted evolutions of displacements and stresses in the shotcrete shell, resulting from the different shotcrete models, are discussed and simulation results are compared to available in situ measurement data. View Full-Text
Keywords: shotcrete; tunneling; finite element model; numerical simulation; constitutive model; damage model; plasticity model shotcrete; tunneling; finite element model; numerical simulation; constitutive model; damage model; plasticity model
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Neuner, M.; Schreter, M.; Unteregger, D.; Hofstetter, G. Influence of the Constitutive Model for Shotcrete on the Predicted Structural Behavior of the Shotcrete Shell of a Deep Tunnel. Materials 2017, 10, 577.

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