"Empirijska procjena spektra odgovora pomoću Fourierovog amplitudnog spektra i vremena trajanja gibanja tla"

master's thesis

• Title (english): "Empirical estimation of the response spectrum using the Fourier amplitude spectrum and the duration of ground motion"
• Author: Filip Skendrović
• Mentor: Snježana Markušić (mentor)
• Committee member: Snježana Markušić (predsjednik povjerenstva)
• Committee member: Josip Stipčević (član povjerenstva)
• Committee member: Maja Telišman Prtenjak (član povjerenstva)
• Committee member: Ivica Sović (član povjerenstva)
• Committee member: Antun Marki (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geophysics); Zagreb
• Defense date and country: 2020-02-24, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geophysics; Seismology and Physics of the Earth's Interior

Abstract

Prilagodba atenuacijskih relacija za područja različitih seizmičkih, seizmotektonskih i geoloških značajki jedan je od glavnih izazova u istraživanju seizmičkog hazarda. Vjeruje se da ključ te prilagodbe leži u spektralnoj domeni gibanja tla. Stoga su u ovom radu predstavljene empirijske jednadžbe za procjenu Fourierovog amplitudnog spektra (FAS) i trajanja gibanja tla. Izračunate su procjene FAS-a i trajanja gibanja tla te su prikazane u ovisnosti o magnitudi i udaljenosti od žarišta potresa. Promatraju se razlike prirodnih logaritama opaženih vrijednosti FAS-a i trajanja gibanja tla i njihovih predviđenih vrijednosti. Dobivene razlike dijele se na tri dijela: srednje odstupanje, reziduali zbog varijabilnosti među događajima i reziduali zbog varijabilnosti unutar događaja. Reziduali među događajima prikazani su u ovisnosti o magnitudi, a reziduali unutar događaja u ovisnosti o udaljenosti od žarišta potresa i tipu tla. Procijenjene vrijednosti FAS-a i trajanja gibanja tla kombinirane su pomoću teorije nasumičnog titranja (eng. Random vibration theory; RVT) i izračunat je spektar odgovora tla koji je prikazan u ovisnosti o magnitudi i udaljenosti. Opisana metoda primijenjena je na skup podataka koji je konstruiran korištenjem podataka iz RESORCE-2018 i BSHAP baze podataka, a obuhvaća zapise s područja Albanije, Bosne i Hercegovine, Crne Gore, Hrvatske, Makedonije, Slovenije i Srbije. Dobiveni spektri uspoređeni su s istraživanjem Bora i sur. (2014). Glavni cilj opisanog pristupa je primjena atenuacijskih relacija na različita seizmička područja s karakterističnim vrijednostima seizmičkih parametara. Prikazan je postupak prilagodbe spektara odgovora tla za različite vrijednosti parametra kappa u dvije različite seizmičke regije.

Abstract (english)

Adjustment of empirical ground motion prediction equations to areas with different seismic, seismotectonic and geological features is one of the major challenges in seismic hazard research. Wa assume that the key to this adaptation lies in the spectral domain of ground motion. Therefore, empirical equations for estimating the Fourier amplitude spectrum (FAS) and duration of ground motion are presented. Estimates of FAS and duration of ground motion were calculated and plotted against magnitude and source-to-site distance. We compared the differences between the natural logarithms of the observed FAS values and duration of ground motion with their predicted values. The resulting differences are divided into three parts: mean deviation, within-event residuals and between-event residuals. Between-event residuals are plotted against magnitude, and within-event residuals are plotted against source-to-site distance and ground type. The estimated FAS values and duration of ground motion were combined through the Random Vibration Theory (RVT) to obtain response spectrum. The response spectrum was plotted against magnitude and source-to-site distance. The described method was applied to a dataset constructed using data from RESORCE2018 and the BSHAP database, which includes records from Albania, Bosnia and Herzegovina, Montenegro, Croatia, Macedonia, Slovenia and Serbia. The obtained spectra were compared with the study of Bora et al. (2014). The main objective of the described approach is to adapt empirical ground motion prediction equations to different seismological environments. We demonstrate the adjustment in response spectral ordinates for differing values of kappa in two different regions.

• Keywords: atenuacijske relacije gibanja tla; Fourierov amplitudni spektar; trajanje gibanja tla; spektar odgovora
• Keywords (english): GMPE; Fourier amplitude spectrum; duration of ground motion; response spectrum
• Language: croatian
• URN:NBN: urn:nbn:hr:217:979579
• Study programme: Title: Graduate university study pf Physics - Geophysics; specializations in: Seismology and Physics of the Earth's Interior, Meteorology and Physical Oceanography; Course: Seismology and Physics of the Earth's Interior; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra fizike – geofizike (magistar/magistra fizike – geofizike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-03-02 13:05:27