Effect of geometric irregularities on the dynamic response of masonry arches. (2017)

• Record Type: Journal Article
• Authors: Severini, L.; De Jong, M.; Cavalagli, N.; Gusella, V.
• Is Part Of: Procedia engineering. Volume 199(2017)
• Page Start: 1140
• Page End: 1145
• Publication Date: 2017
• Subjects: masonry arch -- geometric irregularities -- non-linear dynamic analysis; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2017.09.242
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: In this paper, the effect of geometric irregularities on the dynamic response of circular masonry arches is considered. Irregular geometries are obtained through a random generation of the key geometric parameters, and the effect of these irregularities is shown by modelling the dynamic response to ground motion. The masonry arch is modelled as a four-link mechanism, i.e., a system made of three rigid blocks hinged at their ends, where the position of the hinges at the instant of activation of the motion is determined through limit analysis. Lagrange's non-linear equations of motion have been solved through numerical integration. The results show that geometrical uncertainties produce an alteration of the mechanical features of the rigid blocks which may reduce the seismic capacity.