4.6 Article

Shake-Table Testing of a Cross Vault

Journal

BUILDINGS
Volume 12, Issue 11, Pages -

Publisher

MDPI
DOI: 10.3390/buildings12111984

Keywords

cross vault; shake-table testing; grouting; struts; ties; vertical prestressing

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Architectural elements such as domes, vaults and arches are vulnerable to seismic actions due to the thrust they impose on vertical elements. Strengthening techniques suitable for monuments can improve the behavior of these structures and reduce damage.
Domes, vaults and arches are structural components of high vulnerability, due to the horizontal component of the thrust they impose to the supporting vertical elements (piers or walls), accentuated by the asymmetry of loading due to seismic actions. In order to explore the possibilities of reducing this vulnerability, a cross vault made of brickwork and supported by two stone masonry walls was tested on the earthquake simulator. A series of seismic tests was performed to the specimen at its as-built state, as well as after strengthening using techniques adequate for monuments, namely, grouting of piers, arrangement of struts/ties at the base of the cross vault and vertical prestressing of the masonry piers. The tests have confirmed the vulnerability of the original specimen, as well as the improvement of its behavior after strengthening, in terms of sustained maximum base acceleration, deformations and observed damage.

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