A Discrete Macro-Element Method (DMEM) for the nonlinear structural assessment of masonry arches. (1st August 2018)

• Record Type: Journal Article
• Authors: Cannizzaro, F.; Pantò, B.; Caddemi, S.; Caliò, I.
• Is Part Of: Engineering structures. Volume 168(2018)
• Page Start: 243
• Page End: 256
• Publication Date: 2018-08-01
• Subjects: Macro-element modelling -- Discrete Element Method -- Discrete Macro-Element Method (DMEM) -- Masonry arch -- Historical structures analysis -- Nonlinear analysis -- HiStrA software; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2018.04.006
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A plane discrete macro-element method for masonry arch structures is presented. Interaction among contiguous elements is governed by zero-thickness interfaces. An internal degree of freedom rules the shear deformability of the element. Effective simulations of typical collapse behaviours of masonry arches is obtained. Validations with FEM and experimental benchmarks are presented. Abstract: The structural response of masonry arches is strongly dominated by the arch geometry, the stone block dimensions and the interaction with backfill material or surrounding walls. Due to their intrinsic discontinuous nature, the nonlinear structural response of these key historical structures can be efficiently modelled in the context of discrete element approaches. Smeared crack finite elements models, based on the assumption of homogenised media and spread plasticity, fail to rigorously predict the actual collapse behaviour of such structures, that are generally governed by rocking and sliding mechanisms along mortar joints between stone blocks. In this paper a new Discrete Macro-Element Method (DMEM) for predicting the nonlinear structural behaviour of masonry arches is proposed. The method is based on a macro-element discretization in which each plane element interacts with the adjacent elements through zero-thickness interfaces and whose internal deformability is related to a single degree of freedom only. Both experimental and numerical validations show the capability of the proposed approach to be applied for the prediction of the non-linear response of masonry arch structures under different loading conditions.