Stochastic behaviour of shallow concrete-filled steel tubular arches

This study investigates non-deterministic responses of concrete-filled steel tubular (CFST) arches accounting for time-dependent material uncertainties. Stochastic models are employed to handle the uncertainties of final shrinkage strain and creep coefficients of concrete core of the shallow CFST arches. Randomness of these parameters is represented by Gaussian probability densities. Random variable functional moment method is extended to develop the computational expressions for the first two statistical moments of random radial and axial displacements, random axial compressive force and internal bending moment. The feasibility and effectiveness of the presented stochastic analysis approach are demonstrated by comparing the results of numerical example obtained from the random variable functional moment method with the Monte-Carlo simulation method