Naslov
Peculiar stone vaults of the cathedral in Šibenik, Croatia

Autori
Šimunić Buršić, Marina

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the International Conference "Studies in Ancient Structures" / Oszen, Goerun - Istanbul : Yildiz Technical University, Faculty of Architecture, 1997, 487-496

Skup
International Conference "Studies in Ancient Structures"

Mjesto i datum
Istanbul, Turska, 14.07.1997. - 18.07.1997

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Šibenik cathedral; Croatian Quattrocento; peculiar vaults; stone masonry; mechanical behavior; non-tension material; computational analysis; CALPA
(Šibenik Cathedral; Croatian Quattrocento; peculiar vaults; stone masonry; mechanical behavior; non-tension material; computational analysis; CALPA)

Sažetak
The cathedral of Šibenik (built 1431-1536) is a masterpiece of Croatian Quattrocento architecture. It excels for the unique structure of its stone vaults, which also create a covering of the church. The upper vaults of the Šibenik cathedral (ribbed barrel vaults of the nave and semi-barrel upper vaults of the aisles) are erected using the specific method of construction, akin to the timber structures. It results in the peculiar structural effects. Large thin monolithic slabs of the vault webs act as stone beams, transferring their load to the arches, which carry the entire weight of the vaults. Thus the loads (and the thrusts) are concentrated at the arch bearings, where iron ties take over the most of the thrust, enabling a slender vertical substructure. Because of the particular mechanical behaviour of masonry structures, non-resistant to tension, specific methods are used for the analysis: classical graphical method, and CALPA computer programme. Developed specially for the calculation of masonry structures, the CALPA programme is based on the theory of unilateral links, characteristic of no-tension material. Computer analysis of the cathedral proves its structural logic. Purposeful design of the structure results in favourable even distribution of compressive stress, in radically reduced areas of inactive region, and in limited areas of unidirectional state of stress. Due to the peculiar mechanical behaviour of the barrel vault, its load is concentrated in supports of arches. Pilasters, freed by iron ties from vault's thrust, are slender and elegant. The arches of the aisle semi-barrel vaults act as flying buttresses, balancing the part of the nave vault thrust not taken over by iron ties. The ribs and diaphragms of the aisles' groin vaults act as a transverse stiffening. Thus the stresses in the column under it are vertical and almost evenly distributed.

Izvorni jezik
Engleski

Znanstvena područja
Arhitektura i urbanizam

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