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, there was a significant raise of pathologies in these structures, due to lack of maintenance procedures. Thus, this paper main purpose is to create a short-term monitoring plan in order to check the structural behavior of a curved highway concrete bridge in current use. A bridge was chosen as a case study. A hierarchy of six numerical models is shown, so it can validate the bridge's structural behaviour. The acquired data from the monitoring was compared with the finest models so a calibration could be made.

Since the beginning of twentieth century, along with academic publications of Ritter and Mörsch, several studies have been done in order to understand shear strength in reinforced concrete elements. Approximately 1,200 laboratory tests results of reinforced concrete beams under shear stresses were used in a comparative analysis among values from prediction models of codes and laboratory tests results, enabling classification of the codes according to their applicability in several tests intervals. Although the Brazilian Code NBR 6118 (2007) showed good results in usual ranges of parameters, it presented unsatisfactory results on the following cases: low and medium shear transverse reinforcement rate.Keywords: shear design, shear strength, standards comparison, standards applicability.Desde o início do século XX, com as publicações de Ritter e Mörsch, diversos modelos de cálculo foram desenvolvidos para tentar avaliar o valor da força cortante resistente em elementos em concreto armado. Com um banco de dados de cerca de 1.200 resultados de ensaios de laboratório de vigas de concreto armado, solicitadas por esforços de cisalhamento, efetuou-se a análise comparativa entre os valores de predição das principais normas e os resultados de ensaios, permitindo qualificar o modelo de predição das normas quanto sua aplicabilidade em diversos intervalos de ensaios. O modelo de predição da norma brasileira NBR 6118 (2007) [1] apresentou resultados satisfatórios nos intervalos usuais dos parâmetros, porém pouco satisfatórios para elementos com média e baixa taxa de estribos.Palavras-chave: dimensionamento ao cisalhamento; resistência ao cisalhamento; comparação entre normas; aplicabilidade das normas.