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Vault macro-element with equivalent trusses in global seismic analyses

  • This paper proposes a quick and simplified method to describe masonry vaults in global seismic analyses of buildings. An equivalent macro-element constituted by a set of six trusses, two for each transverse, longitudinal and diagonal direction, is introduced. The equivalent trusses, whose stiffness is calculated by fully modeled vaults of different geometry, mechanical properties and boundary conditions, simulate the vault in both global analysis and local analysis, such as kinematic or rocking approaches. A parametric study was carried out to investigate the influence of geometrical characteristics and mechanical features on the equivalent stiffness values. The method was numerically validated by performing modal and transient analysis on a three naves-church in the elastic range. Vibration modes and displacement time-histories were compared showing satisfying agreement between the complete and the simplified models. This procedure is particularly useful in engineering practice because it allows to assess, in a simplified way, the effectiveness of strengthening interventions for reducing horizontal relative displacements between vault supports.

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Metadaten
Author:Linda Giresini, Mauro Sassu, Christoph ButenwegORCiD, Valerio Alecci, Mario De Stefano
DOI:https://doi.org/10.12989/eas.2017.12.4.409
ISSN:2092-7614 (Print)
ISSN:2092-7622 (Online)
Parent Title (English):Earthquakes and Structures
Publisher:Techno-Press
Place of publication:Taejŏn
Document Type:Article
Language:English
Year of Completion:2017
Date of the Publication (Server):2024/02/05
Tag:churches; equivalent stiffness; macro-element; truss; vault
Volume:12
Issue:4
First Page:409
Last Page:423
Link: https://doi.org/10.12989/eas.2017.12.4.409
Institutes:FH Aachen / Fachbereich Energietechnik
collections:Verlag / Techno-Press