Site Classification of Kocaeli Region Based on HVSR Method

Yıl 2020, Cilt: 1 Sayı: 1, 25 - 34, 19.06.2020

Ali Yeşilyurt M. Rizwan Akram Abdullah Can Zülfikar

Öz

Seismic map of the world displays that Turkey is one of the earthquakes affected region due to active tectonic plates. In current research, one of the highest seismic alert zones of Turkey i.e. Kocaeli territory has been selected. The aim of this study is to classify the different sites of Kocaeli region depending on its predominant frequency ranges. More than 300 strong motion records with Richter Scale (Mw) magnitude of 4.5 to 6.5 are available on Disaster and Emergency Management Authority (AFAD) site. For current region, out of total 32 stations, data recordings from 16 stations have been taken into consideration. Strong ground motion records with Mw of 3 or more have been utilized to check the consistency of graphical results by using classical HVSR technique. At the end, results of current method are compared with Eurocode8, NEHRP and the 2008 report of the micronization work done by Kocaeli Metropolitan Municipality and Tubitak. It is believed that the procedure adopted in current study will provide a platform to the upcoming investigators of this field.

Anahtar Kelimeler

HVSR method, Site classifications, Earthquake, Seismic regions

Kaynakça

• [1] Van Katsuhiro Shirao et al; 3World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004Paper No. 623. [2] Lermo and Chávez-García.(1993). Site effects evaluation using spectral ratios with only one station, Bull. Seism. Soc. Am., 83, 1574 – 1594. [3] Seed HB, Sun JH.(1989).Implication of site effects in the Mexico City earthquake of September 19, 1985 for Earthquake-Resistant Design Criteria in the San Francisco Bay Area of California, Report No. UCB/ EERC-89/03, Earthquake Engineering Research Center, University of California, Berkeley [4] Seed RB, Dickenson SE, Riemer MF, Bray JD, Sitar N, Mitchell JK, Idriss IM, Kayen RE, Kropp AK, Harder LF, Power MS. (1990).Preliminary report on the principle geotechnical aspects of the October 17, 1989 Loma Prieta earthquake, Report No. UCB/EERC-90/05, Earthquake Engineering Research Center, University of California, Berkeley [5] Moehle J. (1994).Preliminary report on the seismological and engineering aspects of January 17, 1994 Northridge Erathquake. University of Calif, at Berkeley, Earthquake Engineering Research Center, Report No. UCB/EERC-94/01 [6] Takemiya H, Adam M. (1997).Seismic wave amplification due to topography and geology in Kobe during Hyogo-Ken Nanbu Earthquake. J Struct Mech Earthq Eng 14(2):129–138 [7] Erdik M, Doyuran V, Gulkan P, Akkas N. (1985).A probabilistic assessment of the seismic hazard in Turkey. Tectonophysics 117:295–344 [8] Tezcan SS, Kaya E, BalIE, Ozdemir Z. (2002).Seismic amplification at Avcılar, Istanbul. EngStruct 22:661–667 [9] Ergin M, Ozalaybey S, Aktar M, Yakin MN.(2004).Site amplification at Avcilar, Istanbul. Tectonophysics 391:335–346 [10] Ozel O, Sasatani T. (2004).A site effect study of the Adapazari basin, Turkey, from strong and weak-motion data. J Seismol 8(4):559–572 [11] Cabalar AF, Cevik A. (2009).Genetic programming-based attenuation relationship: an application of recent earthquakes in Turkey. ComputGeosci 9:1884–1896 [12] Pavlenko OV. (2008).Characteristics of soil response in near-fault zones during the 1999 Chi–Chi, Taiwan Earthquake. Pure ApplGeophys 165(9–10):1789–1812 [13] M. RizwanAkram et al. 4th International Conference on Earthquake Engineering and Seismology, 11-13 October 2017, Anadolu University Eskisehir, Turkey [14] Disaster and Emergency Management Authority (AFAD). (2009). Retrieved fromhttps://www.afad.gov.tr/ [15] The Metropolitan Municipality of Kocaeli and Marmara Research Center of TÜBİTAK report towards Site Classification and Seismic Hazard Assessment of Kocaeli Province of Turkey (October, 2008) Retrieved from https://www. kocaeli.bel.tr/ [16] CODE, Price. Eurocode 8: Design of structures for earthquake resistance-Part 1: General rules, seismic actions and rules for buildings. Brussels: European Committee for Standardization, 2005. [17] National Earthquake Hazards Reduction Program (US), Building Seismic Safety Council (US), & United States. Federal Emergency Management Agency. (2001). NEHRP recommended provisions for seismic regulations for new buildings and other structures. Building Seismic Safety Council. [18] TEC2007, Turkish Earthquake Code. Specifications for Structures to be Built in Earthquake Areas, and appendix.The Ministry of Public Works and Settlement, 2007. [19] Guide, Matlab User’s. The mathworks. Inc., Natick, MA, 1998, 5: 333. [20] A.C Zulfikar, H Alcik and E Cakti.Analysis Of Earthquake Records of Istanbul Earthquake Rapid Response System Stations Related to the Determination of Site Fundamental Frequency.15 WCEE Lisbon 2012.