Collapse state of elliptical masonry arches after finite displacements of the supports. (August 2020)

• Record Type: Journal Article
• Authors: Di Carlo, Fabio; Coccia, Simona
• Is Part Of: Engineering failure analysis. Volume 114(2020)
• Publication Date: 2020-08
• Subjects: Masonry elliptical arch -- Limit Analysis -- Supports displacements -- Collapse mechanisms -- Shear failure; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2020.104593
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: Collapse of masonry elliptical arches after finite displacements of the supports. A numerical tool for the horizontal collapse displacements is proposed. The arch is modelled as a system of rigid blocks in frictional contact. The kinematic approach of LA is used in the deformed configuration of the arch. A Mohr-Coulomb law is used to model the sliding strength. Abstract: In this paper, the failure condition of elliptical masonry arches subjected to dead loads in case of finite displacements of the supports is investigated. This is achieved by adopting the kinematic approach of Limit Analysis and considering the deformed configuration of the structure, modelled as a system of rigid blocks in frictional contact. At this aim, a new numerical tool for the evaluation of the horizontal collapse displacement of the springings and of the relative thrust is proposed. An innovative aspect of the proposed modelling consists in the definition of the collapse condition, considering the classical attainment of a kinematic admissible mechanism and including a check regarding the activation of sliding phenomena as well. A parametric survey is carried out to investigate the influence of the involved parameters. Finally, to the advantage of structural engineers, abaci of the horizontal collapse displacement and of the relative thrust are provided.