In recent times, war attacks have been responsible for several cases of total destruction of monuments belonging to the architectural heritage in old tradition countries. In such a context, the debate on proper reconstruction modalities has acquired special relevance. In view of a faithful reproduction of the building configuration, indeed, it has to be verified if the original structural solution could lead to safety levels compatible with the requirements of modern building codes. This problem deserves special consideration when dealing with the issue of seismic safety. Such a situation has typically occurred in the case of the minaret belonging to the ancient Ummayyad Mosque in Aleppo, which was totally destroyed during heavy field fighting. The Ummayyad Minaret was a masonry structure, with a clear iconic value for the city of Aleppo, dating back to the 12th century and having survived a number of dramatic events throughout its life; restoration works had been recently completed before it was destroyed. The intention of local people to reproduce this iconic monument is both clear and well justifiable; the safety level of the original structure, however, has to be assessed. To the purpose of answering such a question, a specific research has been developed; as a first task, the best possible knowledge about the old monument has been achieved, based on the collection and the analysis of available documents; subsequently, an analytical model has been implemented, in order to perform structural analyses at different sophistication levels. Specifically, simplified global evaluations of the seismic capacity have been compared to the results provided by non linear analyses. In line with the long survival of the old minaret throughout centuries, analyses demonstrate a satisfactory safety level of the original masonry structure towards seismic actions, thus justifying the reproduction of the original structural solution. However, it has to be considered that efficient technological solutions which had been developed in time for minarets, based on experience, are not known in detail nowadays. In order to balance this lack of knowledge, a careful use of modern technologies should be done in terms of special materials and strengthening criteria, thus replacing modern construction technology to the old one.

L’esigenza della sicurezza sismica nella ricostruzione di un minareto con le tecniche costruttive della tradizione

C. Chesi;Devin;S. Tonna
2019-01-01

Abstract

In recent times, war attacks have been responsible for several cases of total destruction of monuments belonging to the architectural heritage in old tradition countries. In such a context, the debate on proper reconstruction modalities has acquired special relevance. In view of a faithful reproduction of the building configuration, indeed, it has to be verified if the original structural solution could lead to safety levels compatible with the requirements of modern building codes. This problem deserves special consideration when dealing with the issue of seismic safety. Such a situation has typically occurred in the case of the minaret belonging to the ancient Ummayyad Mosque in Aleppo, which was totally destroyed during heavy field fighting. The Ummayyad Minaret was a masonry structure, with a clear iconic value for the city of Aleppo, dating back to the 12th century and having survived a number of dramatic events throughout its life; restoration works had been recently completed before it was destroyed. The intention of local people to reproduce this iconic monument is both clear and well justifiable; the safety level of the original structure, however, has to be assessed. To the purpose of answering such a question, a specific research has been developed; as a first task, the best possible knowledge about the old monument has been achieved, based on the collection and the analysis of available documents; subsequently, an analytical model has been implemented, in order to perform structural analyses at different sophistication levels. Specifically, simplified global evaluations of the seismic capacity have been compared to the results provided by non linear analyses. In line with the long survival of the old minaret throughout centuries, analyses demonstrate a satisfactory safety level of the original masonry structure towards seismic actions, thus justifying the reproduction of the original structural solution. However, it has to be considered that efficient technological solutions which had been developed in time for minarets, based on experience, are not known in detail nowadays. In order to balance this lack of knowledge, a careful use of modern technologies should be done in terms of special materials and strengthening criteria, thus replacing modern construction technology to the old one.
2019
Atti del XVIII CONVEGNO ANIDIS “L’Ingegneria Sismica in Italia”
978-88-3339-256-1
Minaret, seismic safety, reconstruction, masonry, behavior factor
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1125355
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