Variance reducing capacity of concrete conformity control in structural reliability analysis under parameter uncertainties

When concrete is produced, certain batches are accepted or rejected due to conformity control, resulting in a so-called filter effect characterized by an increase of the expected value and a decrease of the variance of the material property under consideration. As a consequence, conformity control influences the distribution of the parameters of the material strength distribution, resulting in a filter effect on the uncertain reliability index. Thus, conformity control can be used as a variance reduction technique with respect to the distribution of the reliability index. An approximate method is presented in order to quantify the filter effect of conformity control with respect to the standard deviation of the reliability index distribution and with respect to the predictive reliability index. Finally, the variance reducing capacity of the conformity criteria in the European Standard EN 206-1 is calculated and the effect on the predictive reliability index is quantified, taking into account different concrete classes.

ISBN:9780415669863

Jaar van publicatie:2011

Toegankelijkheid:Closed