Enhancing the Performance of Reinforced Concrete Beam Structure Using CFRP and CFRP Anchor

Abstract

Structural problems related to damage and failure of the buildings. Some methods have been commonly applied to enhance the capacity of a building structure through strengthening and repair by enlarging the dimensions of the structure, reinforcing it using steel plates, applying external pre-stressing, and carbon fiber-reinforced polymer (CFRP). CFRP is alternative material for reinforcing building structures. Unfortunately, debonding failure often occurs in the use of CFRP unless special treatment is applied for more optimal reinforcement capability. In this experimental study, CFRP with an anchor system made of CFRP was applied in concrete reinforcement. This experimental laboratory study was done through a series of scientific procedures to explain the problems and propose a proper solution. The test object in this study was a beam of 150 mm x 200 mm x 3200 mm size with a third point load. The variables in this study were different distances between anchors at 0.000 mm, 1200 mm, 800 mm, 400 mm, 200 mm. The results showed that the CFRP anchor applied within 1200 mm successfully increased the strength capacity by 33,910%. The use of anchor solved debonding problems regarding the use of CFRP. The use of CFRP anchors within 1200 mm distance was found as the most effective method in the use of anchors.