A Stochastic Analysis of RC Structures Under Progressive Environmental Collapse Considering Uncertainty and Strengthening by Ties

Abstract

In Civil Engineering praxis, existing reinforced concrete (RC) structures are sometimes subjected to removal of structural elements degraded by environmental effects. These structures can be strengthened by cable elements (tension-ties) in order to avoid a progressive collapse. The probabilistic analysis of this problem is herewith numerically investigated. Emphasis is given to uncertainties for the estimation of structural input parameters, common to old RC structures. Monte Carlo techniques are used and the unilateral behaviour of the cable-elements, which can undertake tension stresses only, is strictly taken into account.