| Buildings around the world are aging, which increases the demands for structural strengthening. From economic point of view, it is obviously untenable to replace all deficient structures. As an alternative, strengthening is an option to keep such structures safe. Several methods have been developed to strengthen deteriorated buildings, in particular, the use of composite materials. It is often necessary to pay a great attention to the shear capacity of reinforced concrete beams because of the catastrophic nature of shear failures. Indeed, shear failure is more complex compared to the other failure of a reinforced concrete beam. The current research focuses in this point. For proper management and optimization of global research in shear strengthening of reinforced concrete beams, the ETS team has developed a software tool for data collection. The database established allows researchers to identify areas of lack of research. The second phase of this study is to conduct a test program of this new technique for shear strengthening that uses FRP composite material in the form of bars injected into the beam web. The second phase is carried out with the following objectives: 1. Evaluate the effectiveness of the method by comparing it to the near surface mounted technique (NSM); 2. Investigate the influence of the presence of internal steel stirrups; 3.Estimate the effects on the spacing between the internal cracks. Based on the results of this investigation, the new technique is very promising. It shows its superiority in terms of efficiency compared to the NSM method, especially when there are no steel stirrups to ensure a first line of defence against the shear force. The new method is found to increase the efficiency by 122% ETS.;Keywords: Reinforced concrete beams, shear, strengthening, FRP, NSM... |
