Procjena dinamičkog odziva katedrale sv. Jakova u Šibeniku na mjerenje mikroseizmičkog nemira

master's thesis

• Title (english): Assessment of the dynamic response of the Cathedral of St. Jakov in Šibenik to microseismic noise measurements
• Author: Valentina Dervišević
• Mentor: Snježana Markušić (mentor)
• Mentor: Davor Stanko (komentor)
• Committee member: Snježana Markušić (predsjednik povjerenstva)
• Committee member: Davor Stanko (član povjerenstva)
• Committee member: Josip Stipčević (član povjerenstva)
• Committee member: Antun Marki (član povjerenstva)
• Committee member: Giuliana Verbanac (član povjerenstva)
• Committee member: Maja Telišman Prtenjak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geophysics); Zagreb
• Defense date and country: 2024-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geophysics; Seismology and Physics of the Earth's Interior

Abstract

Izgrađena tijekom 15. i 16. stoljeća, katedrala sv. Jakova u Šibeniku smatra se jednim od najvažnijih arhitektonskih djela hrvatske kulturne baštine te je uvrštena na popis UNESCO-a 2000. godine. Kako bi se našle ranjive točke katedrale te je se učinilo otpornom na buduće seizmičke učinke, HVSR metodom su mjerene seizmičke ambijentalne vibracije okolnog terena i unutar katedrale. Na osnovi 35 mjerenja na području oko katedrale napravljene su mikrozonacije osnovne frekvencije tla, H/V amplituda, dubine osnovne stijene i Vs30 vrijednosti uskog područja oko katedrale te je određen predominantni smjer gibanja tla.
Mikrozonacijom je utvrđena velika promjena svojstava tla u smjeru jugozapad-sjeveroistok, odnosno od obale prem unutrašnjosti. Iz 19 mjerenja na različitim točkama unutar katedrale određene su frekvencije dominantnih modova za svaki smjer osciliranja.
Prema amplitudi H/V krivulja ustanovljen je predominantni smjer osciliranja katedrale.
Usporedbom mjerenja na terenu i u samoj zgradi određeni su kritični strukturni elementi konstrukcije, koji se nalaze u rezonanciji s tlom; desni bočni zid, lijeva galerija i kupola. Određene strukturne jednice pokazuju i dijagonalne modove osciliranja.
Ovaj rad je prvi rad koji opisuje seizmički odziv katedrale sv. Jakova s obzirom na lokalno tlo te kao takav daje podlogu za daljnja istraživanja i modeliranja odziva, a s konačnim ciljem konstrukcijskog ojačivanja te time očuvanja ovog vrijednog zdanja kulturne baštine.

Abstract (english)

Built during the 15th and 16th centuries, the Cathedral of St. James in Šibenik is considered one of the most important architectural works of Croatian cultural heritage and was included in the UNESCO list in 2000. To identify vulnerable points in the cathedral and enhance its resistance to future seismic effects, seismic ambient vibrations of the surrounding terrain and inside the cathedral were measured using the HVSR method. Based on 35 measurements in the area around the cathedral, microzonation of the ground frequency, H/V amplitude, depth of the base rock, and Vs30 values of the narrow area around the cathedral was performed. The preferred direction of ground movement was also determined. Microzonation revealed a significant change in soil properties in the southwest-northeast direction, i.e., from the coast to the interior. From 19 measurements at different points inside the cathedral, the frequencies of the dominant modes for each direction of oscillation were determined. The predominant direction of oscillation of the cathedral was established based on the amplitude of the H/V curves. By comparing measurements on the ground and within the building itself, critical structural elements were identified: the right side wall, the left gallery, and the dome. Certain structural units also exhibited diagonal modes of oscillation. This paper represents the first documentation describing the seismic response of the Cathedral of St. James concerning the local soil. It serves as a foundational work for further research and modeling of the response, with the ultimate goal of structural strengthening and the preservation of this valuable cultural heritage building.

• Keywords: Katedrala sv. Jakova; HVSR metoda; mikroseizmički nemir; lokalni uvjeti tla; amplifikacija
• Keywords (english): The Cathedral of St. James; HVSR method; microseismic noise; local soil effects; amplification
• Language: croatian
• URN:NBN: urn:nbn:hr:217:585101
• Project: Number: IP-2020-02-3531; Title: Procjena seizmičkog rizika građevina kulturne baštine u Hrvatskoj; Title: Seismic risk assessment of cultural heritage buildings in Croatia; Leader: Snježana Markušić; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: graduate academic research programme: Master of Physics – geophysics, modules: Seismology and solid Earth physics, Meteorology and physical oceanography; specializations in: Seismology and solid Earth physics, Meteorology and physical oceanography; Course: Seismology and solid Earth physics; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni magistar fizike – geofizike (sveučilišni magistar fizike – geofizike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-03-04 14:17:56