Anclajes posinstalados en concretos de alta resistencia

Abstract

Nowadays the great constructions of Colombia and the world, especially road infrastructure, have encouraged the use of high-strength concrete. The use of post-installed anchors has also grown simultaneously in all concrete structures. Therefore an experimental procedure was developed in this investigation to assess post-installed anchor systems based on tensile test specimens with high strength concrete. The evaluation considers the analysis of the tensile tests results of test pieces with an anchoring system for three lengths (6, 9 and 12 times the diameter of the rod) with two rod diameters (3/8” y 5/8”) in two types of high-strength concrete (5000Psi y 6000Psi) to determine the length and effective system load. The analysis carried out on the experimental test is to correlate the result of the maximum strength of steel reinforcement used (fy = 4200Psi) with the variables post anchor system installed. The results obtained are the percentage of system resistance depending on anchor length; the length that ensures steel fluency and their correlations between the percentage of effective resistance reached for each anchorage length and the use of high strength concrete. With the above parameters, the contribution of high strength concretes to the efficiency of the installed anchorage systems was analyzed.