Characterization of site conditions for selected seismic stations in eastern part of Romania

Grecu, Bogdan; Zaharia, Bogdan; Diaconescu, Mihail; Bălă, Andrei; Nastase, Eduard; Constantinescu, E.; Tǎtaru, Dragoș

doi:10.1007/s11600-018-0117-2

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…No study dealing with the characteristics of the vertical ground motions recorded during Vrancea intermediate-depth earthquakes has been identified so far. Until now, the use of the vertical ground-motion component was limited to the evaluation of the soil conditions and the estimation of the bedrock depth for various sites in Romania (e.g., [19][20][21]) using the horizontal-to-vertical spectral ratio (HVSR) [22]. Consequently, considering the context of the update of the current Romanian seismic design code P100-1/2013 [1] and the current generation of Eurocode 8 [2], a revision and an update of the provisions regarding the vertical ground motion for Vrancea intermediate-depth earthquake are necessary.…”

Section: Introductionmentioning

confidence: 99%

Vertical Elastic Acceleration Response Spectra for Vrancea Intermediate-Depth Earthquakes

Pavel,

Vacareanu,

Aldea

et al. 2024

Buildings

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This study is focused on the evaluation of vertical elastic acceleration response spectra for Vrancea intermediate-depth earthquakes in Romania in the context of the ongoing update of the national seismic design code. The ground motion database employed in this research consists of about 500 ground motions recorded during moderate and large Vrancea intermediate-depth earthquakes with moment magnitudes MW ≥ 5.2. The analysis of the dataset showed that a single ground motion recording had a peak ground acceleration larger than 0.20 g. The results of the analyses showed that no significant differences between the control periods of the vertical elastic response spectra as a function of the site class could be inferred. It was also observed that the mean value of the amplification factor computed for the entire ground motion database was about 2.5, irrespective of the earthquake magnitude, site class, or level of horizontal peak ground acceleration. However, larger-magnitude earthquakes generate larger spectral amplifications in the medium- and long-period ranges. The analysis of the ground motions recorded in Bucharest area revealed a magnitude dependency of the control period for the vertical ground motion TC,v. Finally, a single spectral shape for vertical acceleration response spectra characterized by a maximum dynamic amplification factor of 2.5 and control periods TBv and TCv of 0.05 s and 0.60 s is proposed for design purposes. This aspect allows for a major update from the current version of the national seismic design code which proposes control periods of the elastic vertical response spectrum dependent on the horizontal ones. The short-period (at T = 0.2 s) and long-period (at T = 1.0 s) ratios of the vertical acceleration response spectrum to the corresponding horizontal ones are 0.50 and 0.40.

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Section: Introductionmentioning

confidence: 99%

Vertical Elastic Acceleration Response Spectra for Vrancea Intermediate-Depth Earthquakes

Pavel,

Vacareanu,

Aldea

et al. 2024

Buildings

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“…Despite the advantages that base isolation offers (reduced damage expectation, functionality after important seismic events), its efficiency is still questionable in high corner period regions, which request high displacement demands, (Pavel et al,2018;Oliveto, 2020). Therefor the authors conducted a study on an existing hospital building built in Bucharest, the capital city of Romania (it is a high corner period region, T c =1,6s, Romanian Seismic Design Code P100-1/2013; Pavel et al, 2020;Sokolov et al, 2009;Grecu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Base Isolation Compared To Capacity Design For Large Corner Periods And Pulse-Type Seismic Records

Köber

Semrau

Weber

2021

Preprint

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Southern Romania experiences special soil conditions, leading to rather long corner periods and to an enlarged plateau of the response spectrum, with associated large displacement demands. Pulse-type ground acceleration records complete this unique seismic area. Research on the seismic behavior of structures built under these special conditions is limited and engineers are not comfortable with alternative solutions such as base isolation. This study investigates the seismic performance of a hospital building with the following two anti-seismic solutions: 1) stiffening, in line with the capacity design method and 2) base isolation. Base shear, structural drift and structural acceleration are compared for both approaches.

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Vs30-based site classification and assessment of site-specific ground response analysis for densely populated urban areas of Trabzon (NE Turkey)

Senkaya

2022

Acta Geophys.

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Characterization of site conditions for selected seismic stations in eastern part of Romania

Cited by 4 publications

References 19 publications

Vertical Elastic Acceleration Response Spectra for Vrancea Intermediate-Depth Earthquakes

Vertical Elastic Acceleration Response Spectra for Vrancea Intermediate-Depth Earthquakes

Base Isolation Compared To Capacity Design For Large Corner Periods And Pulse-Type Seismic Records

Vs30-based site classification and assessment of site-specific ground response analysis for densely populated urban areas of Trabzon (NE Turkey)

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