Characteristics of building vibrations estimated in various site conditions in Eskisehir, Turkey

PreviousNext No AccessProceedings of the 13th SEGJ International Symposium, Tokyo, Japan, 12–14 November 2018Characteristics of building vibrations estimated in various site conditions in Eskisehir, TurkeyAuthors: Seiji TsunoHiroaki YamanakaOnur KaplanMehmet Safa ArslanOguz OzelSeiji TsunoRailway Technical Research InstituteSearch for more papers by this author, Hiroaki YamanakaTokyo Institute of TechnologySearch for more papers by this author, Onur KaplanAnadolu UniversitySearch for more papers by this author, Mehmet Safa ArslanIstanbul UniversitySearch for more papers by this author, and Oguz OzelIstanbul UniversitySearch for more papers by this authorhttps://doi.org/10.1190/SEGJ2018-133.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Eskisehir, Turkey, which is formed by sedimentary deposits, has potentially moderate seismic risk by active faults, in the north-eastern area of Turkey. The city of Eskisehir has been widely developing in the sedimentary basin and therefore, buildings located in Eskisehir have several types of ground motions affected by the local site effects during earthquakes. In this report, we performed microtremors observations on buildings to estimate characteristics of building vibrations in Eskisehir, Turkey. To understand site conditions near the buildings, we also performed array microtremor observations on the free field. We performed array microtremor observations by small-scale arrays of 1.5 to 16 meters at sites, in which building measurements were performed. We applied data of array microtremor observations to the SPAC method, to obtain phase velocity of Rayleigh waves. And, we estimated S-wave velocity profiles using those phase velocity in the inversion technique. As for microtremors observations on 10 buildings including various structural styles (e.g. height of 7 to about 40 meters) located at different site-conditions above, we deployed two accelerometers on the top floor of the buildings and one accelerometer on the free-field. At first, we evaluated dominant frequency of the buildings, by picking the peaks of spectral ratios of Fourier spectra on the top floor of buildings to those on the free-field. Secondary, we evaluated damping factors of buildings, by fitting spectral ratios calculated using one degree of freedom system to the spectral ratios observed, in the process of trial and error. Finally, we proposed the relationships of dominant periods and damping factors against heights of buildings in Eskisehir, Turkey. Keywords: Building vibration, dominant period, damping constant, site condition, array microtremor observation, EskisehirPermalink: https://doi.org/10.1190/SEGJ2018-133.1FiguresReferencesRelatedDetails Proceedings of the 13th SEGJ International Symposium, Tokyo, Japan, 12–14 November 2018ISSN (online):2159-6832Copyright: 2019 Pages: 588 publication data© 2018 Published in electronic format with permission by the Society of Exploration Geophysicists of JapanPublisher:Society of Exploration GeophysicistsSociety of Exploration Geophysicists of Japan HistoryPublished Online: 29 Apr 2019 CITATION INFORMATION Seiji Tsuno, Hiroaki Yamanaka, Onur Kaplan, Mehmet Safa Arslan, and Oguz Ozel, (2019), "Characteristics of building vibrations estimated in various site conditions in Eskisehir, Turkey," SEG Global Meeting Abstracts : 514-517. https://doi.org/10.1190/SEGJ2018-133.1 Plain-Language Summary KeywordsBuilding vibrationdominant perioddamping constantsite conditionarray microtremor observationEskisehirPDF DownloadLoading ...