Reforço estrutural em concreto armado: abordagem técnica e estudo de caso da Ponte Juscelino Kubitschek

Abstract

This work presents a bibliographic review on technologies and methods for structural strengthening of buildings and special works, highlighting normative guidelines regarding the need and execution of reinforcement techniques. The central focus lies on the analysis of the collapse of the Juscelino Kubitschek Bridge as a case study, emphasizing its importance in demonstrating the relevance of preventive maintenance and timely intervention. From this example, it is highlighted how such measures can prevent tragedies and extend the service life of structures. Technological and executive methods applied in structural strengthening are presented, in accordance with ABNT standards and practical cases in bridges. Among the techniques highlighted are: the use of concrete with additional reinforcement; the employment of steel plates or profiles; and the application of fiber-reinforced polymers (FRP), with emphasis on carbon materials. The procedures for preparing the surfaces to receive the reinforcement are also described. The information provided offers a fundamental basis for understanding the main techniques available and supports the selection of the most appropriate solution, considering the advantages and disadvantages of each method studied.