Estudo da DanificaÃÃo em Barras de AÃo Utilizadas na ConstruÃÃo Civil Submetidas à CorrosÃo atravÃs da MecÃnica

• Autor(a) principal: Josenaldo Bastos de Souza
• Data de Publicação: 2005
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFC
• Texto Completo: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7369
• topic: CiÃncia dos materiais; corrosÃo; concreto armado; ENGENHARIA DE MATERIAIS E METALURGICA

Reinforced concrete structures, like any other structure that uses metal components, is subject to corrosion, and this is one of the main phenomena responsible for the deterioration of these structures. Therefore, a study of this phenomenon is of great importance to better describe the behavior of these mechanical structures. Therefore, this research aims at analyzing the degradation of mechanical properties of steel bars used in construction, considering the effect of corrosion on these properties, and develop a simplified model for damage evolution, through the theory of damage mechanics in continuous media. A study was conducted on the corrosion and degradation of mechanical properties of steel bars were prepared CA-50A samples were initially subjected to accelerated corrosion test (salt spray) during increasing time intervals, all other samples were embedded in cylinders concrete and subjected to accelerated corrosion test "battery electrolyte." After the corrosion tests were carried out tensile tests with loading and unloading. Then, as described by Lemaitre, was used to determine the damage due to the deformation for each sample. By analyzing the evolution of damage submetidasa sample intervals of different corrosion resistance, the type of damage produced by Lemaitre was rewritten due to the damage due to mechanical loading and corrosion.