Abstract
Abstract. Chemical anchorages are applied in many engineering implementations, particularly strengthening of reinforced concrete structures. During strengthening procedure; chemical anchorages should be tested, since they supply to transfer the load between existing construction elements and newly added elements. Therefore; the study of the quality of chemical anchorages is an important issue in construction materials science. In this context; the most important experiment is to determine the pull-out loads of embedded anchorage reinforcement by applying axial loads. In this study; it is aimed to determine the displacements of steel reinforcements, embedded into concrete by using chemical anchorages, while applying axial pulling loads. In order to determine the displacements and load – deformation graphs; starting conditions and every 10 bar pressure applied conditions of the steel reinforcements were captured by the cameras. The obtained images were evaluated by using photogrammetric software. Based on the photogrammetric post-processing results, the load – deformation graphs were plotted and the loads at loss of adhesion were determined.
Highlights
In strengthening applications such as, column jacketing, and the addition of new shear walls to the existing system on frame axes by replacing brick walls, anchorages are widely used for connecting these new vertical members to the existing structure in order to transfer the loads to the foundations and, to secure the combined resistance of existing and strengthening members
Deformation measurement during laboratory testing on construction materials aims at determining the intrinsic characteristics of the considered object
In this study; it is aimed to determine the displacements of steel reinforcements, embedded into concrete by using chemical anchorages, while applying axial pulling loads by means of monitoring and photogrammetric evaluation
Summary
In strengthening applications such as, column jacketing, and the addition of new shear walls to the existing system on frame axes by replacing brick walls, anchorages are widely used for connecting these new vertical members to the existing structure in order to transfer the loads to the foundations and, to secure the combined resistance of existing and strengthening members. Chemical anchors are the simplest methods for achieving the adherence between existing and new constructed reinforced concrete members. According to standard “Products and systems for the protection and repair of concrete”; coded EN 1881, deformations corresponding to the axial tensile loads should be measured. In addition to this; in the standard “Products and systems for the protection and repair of concrete structures, Definitions, requirements, quality control and evaluation of conformity, Anchoring of reinforcing steel bar”, coded EN 1504-6, 0.6 mm is given as the maximum value of deformation for a steel reinforcements which has 16 mm diameter, under 75 kN load which is applied during the test method defined in EN 1881. In this study; it is aimed to determine the displacements of steel reinforcements, embedded into concrete by using chemical anchorages, while applying axial pulling loads by means of monitoring and photogrammetric evaluation
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