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Analysis of anchor bolt pull-out tests by a two-domain boundary element method

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Abstract

Mixed-mode crack propagation in anchor bolt pull-out tests of concrete is analysed, based on the maximum circumferential tensile stress criterion of linear elastic fracture mechanics. Analysis is carried out by implementing a two-domain boundary element method for the plane stress condition. Automatic remeshing of the boundary is accommodated with the increment of crack growth, and the prediction of crack trajectory is accomplished by generating new boundaries. In a parametric study, results are presented for five such cases as combinations of two embedded depths of the anchor bolt, different distances from the edge of the anchor bolt head to the reaction supports, and two lateral support conditions. A simplified formula for the estimation of pull-out capacity is derived from the analytical results, as a function of given geometric and material parameters.

Resume

On analyse la propagation de fissures lors d'essais d'arrachement de boulons d'ancrage en s'appuyant sur le critère de contrainte en traction périphérique circulaire maximale de la mécanique de la rupture linéaire élastique. On effectue l'analyse en mettant en oeuvre la méthode spécifique aux éléments finis pour le cas de contraintes planes. Un remaillage automatique des limites s'ajuste avec l'incrément de croissance de la fissure, et la prédiction du trajet de fissuration s'effectue en générant de nouvelles limites. Dans une étude paramétrique, on présente les résultats pour cinq cas tels que combinaisons de deux profondeurs d'encastrement du boulon d'ancrage jusqu'aux supports de réaction, distances différentes depuis le côté de la tête du boulon d'ancrage jusqu'aux supports de réaction et deux cas de supports latéraux. On en déduit une formule simplifiée pour l'évaluation de la capacité d'arrachement à partir des résultats analytiques en fonction de paramètres géométriques et relatifs aux matériaux donnés.

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Authors and Affiliations

  1. Graduate School of Science & Technology, Kumamoto University, Kurokami 2-39-1, 860, Kumamoto, Japan

    A. H. Chahrour

  2. Department of Civil & Environmental Engineering, Kumamoto University, Kurokami 2-39-1, 860, Kumamoto, Japan

    M. Ohtsu

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  1. A. H. Chahrour
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  2. M. Ohtsu
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Chahrour, A.H., Ohtsu, M. Analysis of anchor bolt pull-out tests by a two-domain boundary element method. Materials and Structures 28, 201–209 (1995). https://doi.org/10.1007/BF02473250

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