Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes

Trakošćan Castle, built on a rocky peak in the late 13th century, is a cultural heritage site protected as a historical entity by the Republic of Croatia. The Castle is constructed as a highly irregular masonry structure with timber or shallow masonry arches, vaults or dome floors. It was substantia...

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Autores principales:	Snježana Markušić, Davor Stanko, Davorin Penava, Domagoj Trajber, Radmila Šalić
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	preliminary observations historical building Trakošćan Castle Croatia building performance recent earthquakes in 2020 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/fb5462aad37d40aa82f6ecca04e86677
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spelling	oai:doaj.org-article:fb5462aad37d40aa82f6ecca04e866772021-11-25T17:43:01ZPreliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes10.3390/geosciences111104612076-3263https://doaj.org/article/fb5462aad37d40aa82f6ecca04e866772021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3263/11/11/461https://doaj.org/toc/2076-3263Trakošćan Castle, built on a rocky peak in the late 13th century, is a cultural heritage site protected as a historical entity by the Republic of Croatia. The Castle is constructed as a highly irregular masonry structure with timber or shallow masonry arches, vaults or dome floors. It was substantially renewed, upgraded and partially retrofitted from the 16th century until the year 2000. The M5.5 (VIII EMS) and M6.2 (VIII-IX EMS) earthquakes, which struck the city of Zagreb on 22 March 2020 and the Pokupsko-Petrinja area on 29 December 2020, strongly shook the Castle’s structure. Earthquake damage was observed and assessed by visual inspection accompanied by ambient vibration measurements. The slight cracks that appeared on masonry arches were found to be critically positioned, and can likely lead to the arches’ collapse if their spreading is not prevented. Ambient vibration measurements, which were compared to pre-earthquake ones, revealed the decrease in the fundamental frequencies of the Castle’s central tower unit and the second floor, thus possibly indicating the loss of structural stiffness as a consequence of the earthquake damage.Snježana MarkušićDavor StankoDavorin PenavaDomagoj TrajberRadmila ŠalićMDPI AGarticlepreliminary observationshistorical buildingTrakošćan CastleCroatiabuilding performancerecent earthquakes in 2020GeologyQE1-996.5ENGeosciences, Vol 11, Iss 461, p 461 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	preliminary observations historical building Trakošćan Castle Croatia building performance recent earthquakes in 2020 Geology QE1-996.5
spellingShingle	preliminary observations historical building Trakošćan Castle Croatia building performance recent earthquakes in 2020 Geology QE1-996.5 Snježana Markušić Davor Stanko Davorin Penava Domagoj Trajber Radmila Šalić Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes
description	Trakošćan Castle, built on a rocky peak in the late 13th century, is a cultural heritage site protected as a historical entity by the Republic of Croatia. The Castle is constructed as a highly irregular masonry structure with timber or shallow masonry arches, vaults or dome floors. It was substantially renewed, upgraded and partially retrofitted from the 16th century until the year 2000. The M5.5 (VIII EMS) and M6.2 (VIII-IX EMS) earthquakes, which struck the city of Zagreb on 22 March 2020 and the Pokupsko-Petrinja area on 29 December 2020, strongly shook the Castle’s structure. Earthquake damage was observed and assessed by visual inspection accompanied by ambient vibration measurements. The slight cracks that appeared on masonry arches were found to be critically positioned, and can likely lead to the arches’ collapse if their spreading is not prevented. Ambient vibration measurements, which were compared to pre-earthquake ones, revealed the decrease in the fundamental frequencies of the Castle’s central tower unit and the second floor, thus possibly indicating the loss of structural stiffness as a consequence of the earthquake damage.
format	article
author	Snježana Markušić Davor Stanko Davorin Penava Domagoj Trajber Radmila Šalić
author_facet	Snježana Markušić Davor Stanko Davorin Penava Domagoj Trajber Radmila Šalić
author_sort	Snježana Markušić
title	Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes
title_short	Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes
title_full	Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes
title_fullStr	Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes
title_full_unstemmed	Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes
title_sort	preliminary observations on historical castle trakošćan (croatia) performance under recent ml ≥ 5.5 earthquakes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fb5462aad37d40aa82f6ecca04e86677
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Preliminary Observations on Historical Castle Trakošćan (Croatia) Performance under Recent ML ≥ 5.5 Earthquakes

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