{'fraction_non_alphanumeric': 0.013863216266173753, 'fraction_numerical': 0.0, 'mean_word_length': 5.050279329608938, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Etude en petites déformations de l'interaction entre une foundation superficielle et une conduite enterrée

ABSTRACT This paper presents the finite element modelling of the interaction between a shallow foundation and a buried pipe. An elastoplastic model with a linear elastic part and Mohr-Coulomb criterion is compared to a non-linear elastic hyperbolic model. It is shown that the elastoplastic model does not allow to represent properly the behaviour of both the foundation and the pipe. Indeed, the choice of a modulus adapted to the prediction of the settlement of the foundation leads to an important underestimation of the stiffness of the soil around the pipe and, consequently, to an overestimation of the stresses in the pipe. On the contrary, the non-elastic model is capable of representing both the high stiffness around the pipe and the significant decrease in stiffness directly below the foundation. The use of nonlinear elasticity is thus interesting, provided it is possible to determine the variation of the modulus with strain and if the loading in monotonous.