FRACTURE STIMULATION OF THE ADHESIVE POST-INSTALLED ANCHOR APPLIED TO EXISTING CONCRETE STRUCTURES

Abstract

This research aims to investigate the applicability of a fracture simulation method based on a concrete damage model and to construct a framework for evaluating the load capacity of an adhesive post-installed anchor according to a failure mode and load resistant mechanism. A continuum damage model based on the fracture mechanics of semi-brittle materials is used for the simulation and interface elements are set at the boundary between adhesive and concrete. The interface elements are used to simulate the contact state at the fracture boundary. The friction contact model is used to simulate the contact behavior by maintaining the initial stiffness in the direction perpendicular to the interface. As a result, by setting the appropriate friction coefficient and fracture occurrence strain in the interface elements, the combined fracture mode of adhesion and cone fracture, which is a characteristic failure mode of adhesive post-installed anchors, are precisely simulated.