Statistical analysis of mechanical properties of prestressing strands

Abstract

A statistical analysis of mechanical properties of prestressing strands used over the last decade in Portugal is presented. Data was collected from a number of tensile tests carried out in Laboratório Nacional de Engenharia Civil (LNEC) during the process of certification of those products. Tests cover a period from 2001 to 2009 and involve manufacturers from several countries. This study examines the variability of the most important mechanical properties, compares the results obtained with the recommendations of the Probabilistic Model Code, as well as the Eurocodes, and proposes probabilistic models for those properties.