Análise das perdas de protensão imediatas em ponte de concreto protendido: um estudo de caso

Abstract

In this study, an analysis was conducted on various types of prestressing, including their applications, construction methods, and methods for calculating immediate prestressing losses. Bibliographic data from the executive projects of the Bridge over the Rio Claro, provided by the executing company, were used for the preparation of this work. Additionally, on-site data were obtained during the prestressing activities of the arches on the bridge decks. A comparison was made between the theoretical elongation determined in the project and the value of the elongation readings achieved during the prestressing. By utilizing on-site data from the prestressing records carried out on the superstructure of the Bridge over the Rio Claro, located in the Municipality of Jataí, state of Goiás, it was possible to understand the need to anticipate prestressing losses so that the process can be monitored and planned appropriately, avoiding significant discrepancies from the original project. Understanding load losses in prestressed bridge elements is crucial, as these losses have the potential to significantly impact the performance of the prestressing system, and consequently, the stability and longevity of bridges using this construction process.