Contribution à la modélisation mécanique et numérique des édifices maçonnés

Abstract : From a mechanical point of view, masonry appears as a composite quasi-brittle geomaterial, characterized by the coexistence of three scales of studies (macroscopic, mesoscopic and microscopic) and two closely related mechanical behaviors: the brittle damage and the non associated plasticity. After an extended review of various existing modelling (phenomenological approach, micromechanical approach and multiscale analysis), it is concluded that two major obstacles are pointed out : the influence of bond on the macroscopic mechanical response and the strain localisation. In this work, a discrete micromechanical modelling in a non-smooth dynamical framework is proposed. Masonry material is considered as a divided medium composed of a collection of deformable bodies in interaction through non-smooth interface laws. The basic model for dry joints, based on unilateral contact and dry friction, is enhanced for mortar joints by cohesive zone models, with brittle failure or continuous damage. The computational framework is based on the Non-Smooth Contact Dynamics method, designed to numerically integrate a non-smooth dynamical evolution with unilateral contact and dry friction. Finite element methods are used for non-linear behavior of each body and are modified to take into account the discrete character of the considered structure. Non-smooth interface laws are solved by means of iterative solvers dedicated to large scale complementarity problems. Finally, an interdisciplinary work has been made with architects and building archaeologists, in order to study monumental buildings in their natural context by means of numerical stereophotogrammetry.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00163767
Contributor : Vincent Acary <>
Submitted on : Monday, October 12, 2009 - 10:07:41 PM
Last modification on : Monday, March 4, 2019 - 2:04:04 PM
Long-term archiving on : Thursday, April 8, 2010 - 7:28:06 PM

Identifiers

  • HAL Id : tel-00163767, version 1

Citation

Vincent Acary. Contribution à la modélisation mécanique et numérique des édifices maçonnés. Mécanique [physics.med-ph]. Université de la Méditerranée - Aix-Marseille II, 2001. Français. ⟨tel-00163767⟩

Share

Metrics

Record views

876

Files downloads

1143