Finite element analysis of effect of lining on damage in viscoplastic rocks

This paper presents the constitutive aspects and a finite element application for an energetic damage criterion within Cristescu’s viscoplastic constitutive law. The numerical model is implemented in finite element code LCPC-CESAR [1] by the author. The numerical solution is used to perform an analy...

Full description

Saved in:
Bibliographic Details
Published in:Computers and geotechnics 2013-04, Vol.49, p.1-6
Main Author: Roatesi, Simona
Format: Article
Language:English
Subjects:
Ceilings
Damage
Finite element method
Mathematical analysis
Mathematical models
Numerical modeling
Rocks
Tunnel excavation
Tunnels (transportation)
Viscoplastic materials
Viscoplasticity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents the constitutive aspects and a finite element application for an energetic damage criterion within Cristescu’s viscoplastic constitutive law. The numerical model is implemented in finite element code LCPC-CESAR [1] by the author. The numerical solution is used to perform an analysis of the evolution of the damage zones around a circular lined cavity in a viscoplastic material subjected to a far field stress. Two important factors regarding the opening stability, namely the lining mounting time and the tunnel face influence, are analyzed. The initial stress of rock mass varies with the depth at which the tunnel is excavated and this fact determines a bigger displacement of the tunnel bottom than the tunnel ceiling. The time emphasizes this asymmetry. The results obtained are in completely accordance with the practical observations.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2012.10.001