Experimental assessment of sillar masonry barrel vaults retrofitted with reinforced concrete elements

G. Caceres-Vilca, J. Copa-Pineda, F. Copa-Pineda, C. Málaga-Chuquitaype

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Resumen

The historic centre of the city of Arequipa (Peru) has been an UNESCO's World Heritage Site since 2000. This is a testament to the exceptional architectural beauty of its many historical buildings most of which are built from a distinctive white volcanic stone, known as Sillar, and date back to the 18th and 19th centuries. Nevertheless, Arequipa is in a region of extreme seismic activity that demands the provision of practical retrofitting solutions to preserve these historical structures. One of the most popular seismic rehabilitation methods in the region is the addition of concrete elements to enhance the seismic response of seismically damaged structures. However, to date there is no detailed study on the benefits provided by these measures; particularly when applied to historical sillar barrel vaults which are a common architectural feature in Arequipa's historic building stock. In this paper we shed light on this issue by presenting, for the first time, the results of an experimental study on retrofitted historical sillar barrel vaults with inserted reinforced concrete frame elements. To this end, three vault specimens of 1/10 scale were built and tested until failure. These specimens were subsequently repaired, retrofitted with concrete elements, and tested again to failure under monotonic lateral loading. Our experimental results allow the quantification of the beneficial effects of the retrofit strategy in the lateral displacement capacity, ductility, and seismic resistance of sillar masonry barrel vaults. It is shown that the addition of concrete frames leads to a better control of plastic deformations, increasing the ductility of the original structures in up to 4.87 times and improving their lateral strength in 6.22 to 8.12 times the original resistance of the unreinforced structures.

Idioma originalInglés
Número de artículo106145
PublicaciónStructures
Volumen62
DOI
EstadoPublicada - abr. 2024

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