Masonry arch structures, and, more in general, vaulted structures, are traditionally assessed using a well-established approach, such as linear elasticity or limit analysis, whereby system behaviour at the intermediate stage −that occurs when the material’s tensile strength has been exceeded but the collapse mechanism has not yet formed− is disregarded. With an evolutionary fracturing process analysis for the stability assessment of a masonry arch it is possible to capture the damaging process that takes place when the conditions evaluated by means of linear elastic analysis no longer apply, and before the conditions assessed through limit analysis set in. Furthermore, the way the thrust line is affected by the opening of cracks and the redistribution of internal stresses can be checked numerically. The evolutionary calculation method presented in this paper takes into account the intermediate cracking stage and uses a constitutive law providing a closer approximation to the actual behaviour of the structural material. By applying this numerical model the monumental arches of the Vittorio Emanuele I Bridge over the Po River, and the Mosca Arch Bridge over the Dora River both in Turin (Italy) are described. The different behaviors under increasing load of the two structural schemes –the Mosca Bridge is a very thin shallow masonry arch, while the Vittorio Emanuele I Bridge presents three-centered rounded arches– are deeply investigated by means of the evolutionary analysis.

Stability assessment of masonry arches by evolutionary fracturing process analysis / Accornero, Federico; Lacidogna, Giuseppe; Invernizzi, Stefano; Carpinteri, Alberto. - (2013), p. 112. (Intervento presentato al convegno XXI Convegno dell'Associazione Italiana di Meccanica Teorica ed Applicata tenutosi a Torino nel 17-20 Settembre 2013).

Stability assessment of masonry arches by evolutionary fracturing process analysis

ACCORNERO, FEDERICO;LACIDOGNA, GIUSEPPE;INVERNIZZI, Stefano;CARPINTERI, Alberto
2013

Abstract

Masonry arch structures, and, more in general, vaulted structures, are traditionally assessed using a well-established approach, such as linear elasticity or limit analysis, whereby system behaviour at the intermediate stage −that occurs when the material’s tensile strength has been exceeded but the collapse mechanism has not yet formed− is disregarded. With an evolutionary fracturing process analysis for the stability assessment of a masonry arch it is possible to capture the damaging process that takes place when the conditions evaluated by means of linear elastic analysis no longer apply, and before the conditions assessed through limit analysis set in. Furthermore, the way the thrust line is affected by the opening of cracks and the redistribution of internal stresses can be checked numerically. The evolutionary calculation method presented in this paper takes into account the intermediate cracking stage and uses a constitutive law providing a closer approximation to the actual behaviour of the structural material. By applying this numerical model the monumental arches of the Vittorio Emanuele I Bridge over the Po River, and the Mosca Arch Bridge over the Dora River both in Turin (Italy) are described. The different behaviors under increasing load of the two structural schemes –the Mosca Bridge is a very thin shallow masonry arch, while the Vittorio Emanuele I Bridge presents three-centered rounded arches– are deeply investigated by means of the evolutionary analysis.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2518692
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