Lebensdauersimulation von Betontragwerken

Lifetime Simulation of Concrete Structures Stochastically based time-dependent analyses applied to a degraded arch bridge

A concept to directly simulate lifetime of engineering structures is introduced. It comprises sets of materially nonlinear structural computations using the finite element method (FEM), thereby considering stochastic scatter of input parameters from domains of geometry, loads and degradation mechanisms. Distinct parameters contributions to lifetime are checked for relevance. Multiple computation of parameter sets generated by enhanced Monte-Carlo sampling leads to responses concerning residual structural lifetime or damage propagation. These responses are established by mean values along with expected standard deviations. The concept is adapted to simulate a degraded prestressed concrete arch bridge built in the 1950s. Additionally, it can be used in advance to optimize engineering structures right from the beginning of their planning processes to account for a maximum lifetime.