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This research presents the studies, tests and the analysis of the results about the behavior of concrete structures reinforced with rebars or steel mesh due to fatigue loading, starting with bridge slabs which are the most susceptible elements to fatigue. The experimental part of this research consists in testing the behavior due to fatigue of concrete slabs, with or without pre-slabs and reinforced with continuous bars or steel mesh. Axial testing in air of 36 specimens of CA50 φ10 mm in continuous bars and mesh were made in order to build the Wöhler Curve for Brazilian conditions. Beyond that, tests were made in 20 concrete slabs with pre-slabs, with several reinforcement’s arrangement. The 20 slabs were submitted to static and dynamic loading. The reinforcement configuration was based on the commonly used for these elements. The scarcity of more precise data about the behavior of concrete slabs reinforced with rebars or welded mesh made in Brazil submitted to cycle loading was the major reason to make a research based on the testing results about this theme, wich results and conclusions are capable of producing more accurate information about the behavior of the slabs.

Investigação experimental da fadiga em lajes de pontes armadas com barras ou telas soldadas.