Análise experimental de emenda em armadura longitudinal de pilares curtos de concreto

• Ano de defesa: 2013
• Autor(a) principal: Cintra, Danielli Cristina Borelli
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Civil; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Civil
• Palavras-chave em Português: Lap splice; Longitudinal reinforcement of column; Reinforced concrete columns; Emenda por traspasse; Armadura longitudinal de pilar; Pilares em concreto armado; Construção de concreto armado; Construção civil; Engenharia Civil; 624
• Link de acesso: http://repositorio.ufes.br/handle/10/6182

The lap splice of the longitudinal reinforcement of columns positioned at the base, widely used in the execution of multiple floors structures in reinforced concrete floors, is the most vulnerable point in the pathological manifestations columns of buildings, compromising the structural performance and durability of the building. This region suffers from the stage of concrete, the high concentration of bars and high altitude release of concrete that promote segregation of the aggregate, and hinder access to the consolidation. During the life of the structure, is a region of high concentration of efforts, especially in columns bracing and often exposed to aggressive agents, such as the accumulation of waste chemicals, cleaning and humidity. The present work is an experimental and statistical study of the behavior at break of 31 short columns reinforced concrete subjected to concentric compression. All columns possessed cross section of 19cm x 19cm, height 170cm, concrete strength around 30MPa and longitudinal geometric rate of 0.88%. Varied only the position and the length of the lap splice to analyze the influence of these two factors and the interaction between them in the capacity of the columns. Are analyzed qualitatively manufacturing procedures samples of columns, which were close to the conditions of execution of the columns in the works. We used a factorial design to statistically analyze the experimental results, which confirmed the hypothesis that none of the factors applied, even the interaction between them, would be significant for the load capacity of the columns.