Reforço estrutural com utilização do método da protensão externa

Abstract

Reinforced concrete has been the most used construction method by mankind for the last few decades, making materials and preserving the creation of buildings never seen before. However, the high use of this method converges with the emergence of several pathologies that arise, due to the wrong use of the structure or increase in loads, leaving it undersized, as well as the lack of in-depth knowledge of professionals in the field and also of users, with the failure to perform usual preventive maintenance. This paper presents some ways of reinforcements to treat the recurrent pathologies in the structures, emphasizing external prestressing, a technique that reduces the acting stresses, being very efficient and practical, but which requires specialized labor. In addition, presenting the main equipment used in this technique and its use in the field, having the case study of two different cases, the first being a building, adhering to this technique, located in Portugal, in 2005, and the second case on water reservoir, located in the city of Santa Maria (RS), demonstrating ways of use and different goals for this technique.