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.
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