Analysis and design of an underground hard rock voussoir beam roof

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1996 (EN)
Analysis and design of an underground hard rock voussoir beam roof (EN)

Sofianos, AI (EN)

N/A (EN)

The behaviour of a voussoir hard rock beam roof is investigated by considering it to act as a symmetric flat arch with cracks at the abutments and at midspan. Analytical formulae are derived initially that evaluate, for any given geometry, loading and mechanical parameters of the beam, its deflection and strain within it in terms of the extreme and mean arch thicknesses. The latter are determined statistically by best fitting a large amount of available computer beam model responses. Three relations are then established, one for each of the three examined modes of failure, i.e. snap through, crushing of the rock and transverse slip at the abutment, that relate the loading of the beam, its mechanical parameters and its dimensions. Finally all three relations are incorporated in a single non-dimensional graph where the loading and the mechanical parameters of the beam are related to the geometry of the beam for various factors of safety of the three modes of failure. Copyright © 1996 Elsevier Science Ltd. All rights reserved. (EN)


Structural design (EN)
Rock mechanics (EN)
voussoir beam (EN)
Structural loads (EN)
Roofs (EN)
Statistical methods (EN)
Computer beam model (EN)
Cracks (EN)
Mathematical models (EN)
beam roof (EN)
Factor of Safety (EN)
Computer simulation (EN)
Failure modes (EN)
underground excavation (EN)
Strain (EN)
Geometry (EN)
Underground hard rock voussoir beam roof (EN)
Beams and girders (EN)
Deflection (structures) (EN)
Analysis and Design (EN)
Symmetric flat arch (EN)
roof failure (EN)
support (EN)
Analytical formulae (EN)
Structural analysis (EN)
Single non-dimensional graph (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

International Journal of Rock Mechanics and Mining Sciences and Geomechanics (EN)



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