Arch responses to correlated multiple excitations

This paper analyses the in‐plane stochastic responses of incompressible circular arches to spatially correlated multiple excitations. The dynamic, quasi‐static and total structural displacements, moments, shear and axial forces are calculated. The results are compared with those obtained by various simplified excitations. The effects of the ground motion spatial variations on arch responses are examined. The results indicate that the responses may be underestimated or overestimated by neglecting the ground motion spatial variations, depending upon the structure and ground motion properties, the locations where the responses are evaluated, and the response quantity under consideration.