Probabilistic models for mechanical properties of prestressing strands

• Autor(a) principal: Jacinto, Luciano
• Data de Publicação: 2012
• Outros Autores: Pipa, Manuel, Neves, Luís C., Oliveira Santos, Luís
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.21/5048
• topic: Prestressing strands; Probabilistic models; Tensile strength; 0.1% proof stress; Modulus of elasticity; Bayesian statistics

This study focus on the probabilistic modelling of mechanical properties of prestressing strands based on data collected from tensile tests carried out in Laboratório Nacional de Engenharia Civil (LNEC), Portugal, for certification purposes, and covers a period of about 9 years of production. The strands studied were produced by six manufacturers from four countries, namely Portugal, Spain, Italy and Thailand. Variability of the most important mechanical properties is examined and the results are compared with the recommendations of the Probabilistic Model Code, as well as the Eurocodes and earlier studies. The obtained results show a very low variability which, of course, benefits structural safety. Based on those results, probabilistic models for the most important mechanical properties of prestressing strands are proposed.