USO DE RECEPTORES GPS DE 100 HZ NA DETECÇÃO DE DEFLEXÕES VERTICAIS MILIMÉTRICAS DE PONTES DE CONCRETO DE PEQUENO PORTE/The use of GPS at a rate of 100 HZ to detect millimetric vertical deflections of small sized concrete bridges

• Published in: Boletim de Ciências Geodésicas 2015-04, Vol.21 (2), p.290
• Main Authors: Larocca, Ana Paula Camargo, Neto, João Olympio De Araújo, Trabanco, Jorge Luiz Alves, Barbosa, Augusto César Barros, Da Cunha, André Luiz Barbosa Nunes, Schaal, Ricardo Ernesto
• Format: Article
• Language: Portuguese
• ISSN: 1413-4853; 1982-2170
• DOI: 10.1590/S1982-21702015000200017

The last four decades were important for the Brazilian highway system. Financial investments were made so it could expand and many structural solutions for bridges and viaducts were developed. In parallel whit this development, there was a significant raise of pathologies in these structures, due to lack of maintenance procedures. Thus, this article purposes the use of GPS to create a short-term monitoring plan in order to check the structural behavior of a curved highway concrete bridge in current use. And it present the first results of the research with the L1 GPS carrier frequency and recorded data at a rate of 100 Hz, at the monitoring center span of small concrete bridge located on the Jaguari River, in the city of Extreme which borders Minas Gerais and Sao Paulo states. The challenge lies in the fact that such structures, small and medium-sized concrete bridges, account for the vast majority of art works of Brazilian highways and, as they are rigid structures, small present up to 5 mm vertical deflections.