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Original Articles

Essai in situ sur blocs de terre comprimée

Interprétation en compression ou traction de l'essai de flexion en trois points?

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Pages 221-237 | Published online: 04 Oct 2011
 

ABSTRACT

A lattice made of two struts and a tie is studied, having a behavior at failure close to that of a compressed earth block (CEB) during a 3 points bending test. Usually this test is modelled by considering that the CEB is an elastic linear beam under bending, at failure a tensile stress is then calculated. In this paper, by considering the failure occurring in the strut in compression or by traction in the tie, the failure stress is expressed simply as a compression strength or a tensile strength.

RÉSUMÉ

Nous fabriquons un treilli composé de deux bielles et un tirant, qui a un comportement à la rupture analogue à celui d'un bloc de terre comprimée (BTC) lors d'un essai de flexion en trois points. On exprime simplement que la rupture peut se produire en compression dans les bielles ou en traction dans le tirant. La modélisation habituelle considère que le BTC est un solide poutre élastique linéaire sollicité en flexion simple. Les données expérimentales de différents auteurs montrent que la modélisation simplifiée par bielles en compression et par tirant en traction, que nous proposons, est adaptée au cas des BTC.

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