In this paper the influence of the vertical component of ground motion on the performance of an unreinforced masonry wall is analysed using sets of one-component and two-component ground motions. The set of motions represents the actual seismicity of L'Aquila, while the investigated wall mimics an experimental specimen with two unconnected external leaves and a rubble core. The model falls within the mixed finite element method – discrete element method and accounts for crack formation, complete separation and new contact formation. The modelling strategy is capable to simulate the out-of-plane seismic response and the progressive loss of compactness of the wall up to collapse with the separation between the two external leaves. The vertical component increases the fragility of the wall and confirms the relevance of vertical ground motion for very vulnerable constructions. Nonetheless, to worsen the response, the vertical component needs to overcome specific, non-negligible intensity measure thresholds.

Effect of the vertical component of ground motion on a rubble masonry wall model / Al Shawa, Omar; Liberatore, Domenico; Sorrentino, Luigi. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 44:(2023), pp. 1396-1402. (Intervento presentato al convegno XIX convegno ANIDIS tenutosi a Torino, Italia) [10.1016/j.prostr.2023.01.179].

Effect of the vertical component of ground motion on a rubble masonry wall model

Al Shawa, Omar;Liberatore, Domenico;Sorrentino, Luigi
2023

Abstract

In this paper the influence of the vertical component of ground motion on the performance of an unreinforced masonry wall is analysed using sets of one-component and two-component ground motions. The set of motions represents the actual seismicity of L'Aquila, while the investigated wall mimics an experimental specimen with two unconnected external leaves and a rubble core. The model falls within the mixed finite element method – discrete element method and accounts for crack formation, complete separation and new contact formation. The modelling strategy is capable to simulate the out-of-plane seismic response and the progressive loss of compactness of the wall up to collapse with the separation between the two external leaves. The vertical component increases the fragility of the wall and confirms the relevance of vertical ground motion for very vulnerable constructions. Nonetheless, to worsen the response, the vertical component needs to overcome specific, non-negligible intensity measure thresholds.
2023
XIX convegno ANIDIS
Numerical analysis; Finite-discrete element method; Masonry disintegration; Masonry fragmentation
04 Pubblicazione in atti di convegno::04h Atto di convegno in rivista scientifica o di classe A
Effect of the vertical component of ground motion on a rubble masonry wall model / Al Shawa, Omar; Liberatore, Domenico; Sorrentino, Luigi. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 44:(2023), pp. 1396-1402. (Intervento presentato al convegno XIX convegno ANIDIS tenutosi a Torino, Italia) [10.1016/j.prostr.2023.01.179].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1678571
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