Ankara çevresi için Arias şiddetinin incelenmesi

Öz

Kuvvetli yer hareketi incelemelerinde genlik, en büyük yatay yer ivmesi ile spektral parametreler sismik açıdan tehlikeli alanlarda yapı dizaynında kullanılan temel bileşenlerdir. Bu çalışmada, bir çok aktif fayın kesişme noktasında yer alan Ankara çevresindeki ivme kayıtları derlenerek, sıvılaşma ve sismik şev duraylılığında da kullanılan Arias şiddetinin değişimi incelenmiştir. Büyüklüğü 4.0’den büyük olan deprem kayıtları incelenerek, özellikle odak noktası Ankara şehir merkezine en yakın olan 27 Aralık 2007 Bala depremi kayıtları dikkate alınmıştır. Bu depremin ana şoku Ankara ilinin batısında, yeni yerleşimlerin bulunduğu yerlerde yoğun şekilde hissedilmiştir. Ayrıca; Afyon-Dinar (1995) ile Çay (2002) depremleri, Düzce (12 Kasım 1999) depremi, Çankırı-Orta (2002) depremi ve Eskişehir’ de 2014 ve 2015 yıllarında kaydedilmiş olan iki adet deprem incelenerek çalışmanın kapsamına alınmıştır. Kuvvetli yer hareketi incelemelerinde, özellikle depremin toplam süresi ve frekans içeriğinin dikkate alındığı Arias şiddetinin kayıtçılardaki zamana bağlı değişimi hesaplanarak enerji boşalım süreleri belirlenmiştir. Kaya ve zemin için geliştirilen eşitliklerin farklı fay türlerine göre gerilme azaltma değerleri de değerlendirilerek, Ankara ve yakın çevresi için dizayn Arias şiddeti belirlenmiştir. Ankara’ya 50 km ve 100 km mesafede oluşacak bir depremde en yüksek Arias şiddeti 0.2 m/s ve 0.1 m/s elde edilmiştir. Elde edilen değerlerin sıvılaşma ve sismik şev duraylılığı çalışmalarında kullanılması için daha detaylı çalışmalar yapılmalıdır.

Anahtar Kelimeler

• Deprem,Arias şiddeti,Azalım,Ankara

Investigation of Arias intensity for Ankara and surroundings

Abstract

The amplitude, peak ground acceleration and spectral ordinates are the main components of strong ground motion investigation for design within seismic regions. In this study, variation of Arias intensity as used for liquefaction and seismic slope stability was extracted from the acceleration records for the city of Ankara, whicih is located at the conjunction of several active faults. The study included the earthquake records with magnitudes greater than 4.0 with particular emphasis on December 27^th 2007 Bala earthquake, since the epicenter of such earthquake is closest to Ankara. The mainshock of Bala earthquake was felt strongly around western Ankara, especially nearby new residential areas. Earthquakes of Afyon-Dinar (1995), Çay (2002), Düzce (November 12 1999), Çankırı-Orta (2002) and two earthquakes recorded at 2014 and 2015 within Eskişehir city were also included. Arias intensity includes the total duration and frequency content of earthquake when compared to peak ground acceleration. The variation of Arias intensity was calculated in order to determine the main energy release durations. Attenuation of Arias intensity was obtained based on the distance between the study area and recorder stations. The design Arias intensity value for central Ankara was attained including the stress drop for different fault types for rock and soil conditions. Peak Arias Intensities for 50 km and 100 km around Ankara are 0.2 m/s and 0.1 m/s. More detailed studies should be implemented to employ such values for liquefaction and seismic slope stability.

Keywords

• Earthquake,Arias intensity,Attenuation,Ankara

Kaynakça

1. Arias A. A Measure of Earthquake intensity. Seismic Design for Nuclear Power Plants. MIT Press, Cambridge, Massachusetts, 1970.
2. Kayen RE, Mitchell JK. “Assessment of liquefaction potential during earthquakes by Arias Intensity”. Journal of Geotechnical and Geoenvironmental Engineering (ASCE), 123(12), 1162-1174, 1997.
3. Liang L. Development of an Energy Method For Evaluating The Liquefaction Potential of a Soil Deposit. PhD. Dissertation, Case Western Reserve University, USA, 1995.
4. Harp EL, Wilson RC. “Shaking intensity thresholds for rock falls and slides: evidence from 1987 Whittier Narrows and Superstition Hills eartquake strong-motion records”. Bulletin of the Seismological Society of America, 85(6), 1739-1757, 1995.
5. Egan JA, Rosidi D. "Assessment of earthquake-induced liquefaction using ground-motion energy characteristics." 10th Pacific Conference on Earthquake Engineering,20-22 Novembe, New Zealand, 1991.
6. Romeo R. “Seismically induced landslide displacements: a predictive model”. Engineering Geology, 58, 337-51, 2000.
7. Green RA, Mitchell JK. “A closer look at Arias intensity-based liquefaction evaluation procedures”. 2003 Pacific Conference on Earthquake Engineering, 13-15 February, New Zealand 2003.
8. Jibson RW. “Regression models for estimating coseismic landslide displacements. Engineering Geology, 91(2-4), 209-218, 2007.

9. Mahdavifar M, Jafari MK, Zolfaghari MR. “The attenuation of Arias Intensity in Alborz and Central Iran”. 5th International Conference on Seismology and Earthquake Engineering, Tehran, Iran, 13-16 May 2007.
10. Kadirioğlu FT, Kartal RF. “The mew empirical magnitude conversion relations using an improved earthquake catalogue for Turkey and its near vicinity (1900-2012)”. Turkish Journal of Earth Sciences, 25, 300-310, 2016.
11. Şengör AMC. Türkiye’nin Neotektoniğinin Esasları. Ankara, Türkiye, Türkiye Jeoloji Kurumu Yayını 1980.
12. Koçyiğit A. “Orta Anadolu’nun genel neotektonik özellikleri ve depremselliği. Haymana-Tuzgölü-Ulukışla Basenleri uygulamalı çalışma”. Türkiye Petrol Jeologları, 5(Özel Sayı), 1-26, 2000.
13. Esat K, Çıvgın B, Kaypak B, Işık V, Ecevitoğlu B, Seyitoğlu G. “The 2005-2007 Bala (Ankara, central Turkey) earthquakes: a case study for strike-slip fault terminations”. Geologica Acta, 12(1), 71-85, 2014.
14. Şaroğlu F, Emre Ö, Boray A. “Türkiye’nin diri fayları ve depremselliği”. MTA Rapor No: 8174, 1987.
15. Beekman, EH. “The Pliocene and Quaternary volcanism in the Hasandağ-Melendizdağ region”. MTA Bulletin, 66, 90-105, 1966.
16. Koçyiğit A. “Changing stress orientation in progressive intracontinental deformation as indicated by the neotectonics of the Ankara region (NW Central Anatolia)”. TPJD Bülteni, 3(1), 43-55, 1991.
17. Seyitoğlu G, Ecevitoğlu BG, Kaypak B, Güney Y, Tün M, Esat K, Avdan U, Temel A, Çabuk A, Telsiz S, Aldaş Uyar GG. “Determining the main strand of the Eskişehir strike-slip fault zone using subsidiary structures and seismicity: a hypothesis tested by seismic reflection studies”. Turkish Journal of Earth Sciences, 24, 1-20, 2015.
18. Barka A. “The 17 August 1999 Izmit earthquake”. Science, 285, 1858 -1859, 1999.
19. Reilinger RE, Ergintav S,Bürgmann R, McClusky S, Lenk O, Barka A, Gurkan O, Hearn L, Feigl KL, Cakmak R, Aktug N, Ozener H, Toksöz MN. “Coseismic and postseismic fault slip for the 17 August 1999 M=7.5, Izmit, Turkey earthquake”. Science, 289, 1519-524, 2000.
20. Stein RSA, Barka, B, Dieterich JH. “Progressive failure on the North Anatolian fault since 1939 by earthquake stress triggering”. Geophysics Journal International, 128, 594-604, 1997.
21. Şaroglu F, Emre Ö, Kuşçu I. Active Fault Map of Turkey. Ankara, Turkey, Maden Tetkik ve Arama Genel Müdürlüğü (MTA) 1992.
22. Seyitoğlu G, Kazancı N, Karadenizli L, Şen Ş, Varol B, Karabıyıkoğlu T. “ Rockfall avalanche deposits associated with normal faulting in the NW of Çankırı Basin: Implications for the postcollisional tectonic evolution of the Neo-Tethyan suture zone”. Terra Nova, 12, 245-251, 2000.
23. Seyitoğlu G, Aktuğ B, Karadenizli L, Kaypak B, Şen Ş, Kazancı N, Işık V, Esat K, Parlak O, Varol B, Saraç G, İleri İ. “A late Pliocene - Quaternary pinched crustal wedge in NW central Anatolia, Turkey: a neotectonic structure accommodating the internal deformation of the Anatolian plate”. Türkiye Jeoloji Bülteni, 52(1), 121-154, 2009.
24. Ambraseys NN, Finkel C. “Seismicity of Turkey and neighbouring regions, 1899-1915”. Annales Geophysicale, B, 701-726, 1987.
25. Özmen B, Kocaefe S. “The seismicity and earthquake hazard of Ankara”. International Workshop on Recent Earthquakes and Disaster Prevention Management, METU, Ankara, Turkey, 10-12 March 1999.
26. Arni P. Kırşehir, Keskin ve Yerköy Arasındaki Havalide Vukua Gelen Zelzele. Ankara, Türkiye, MTA Yayınları, 1938.
27. Ergünay O. “Sismik tehlike ve risk açısından Ankara’ya genel bir bakış”. Yerbilimleri Açısından Ankara’nın Sorunları Sempozyumu, Ankara, Türkiye, 12-14 Aralık 1978.
28. Kocaefe SS. Batı Anadolu Aktüel Tektoniği ve Ege-Anadolu Plakacıkları Arası Yapısal İlişkinin Saptanması. Doktora Tezi, Hacettepe Üniversitesi, Ankara, Türkiye, 1981.
29. Demirtaş R, Iravul Y, Erkmen C, Barani B, Yaman M, Baykal M, Kılıç T. 06 Haziran 2000 Orta (Çankırı) Depremi. Ankara, Türkiye, JMO Haber Bülteni, 2000.
30. Özden S, Kavak KŞ, Koçbulut F, Över S, Temiz H. “3 Şubat 2002 Çay (Afyonkarahisar) depremleri. Türkiye Jeoloji Bülteni, 45(2), 49-56, 2002.
31. Maden Tetkik Arama Enstitüsü. “27 Aralık 2007 Bala (Ankara) Depremi Bilgi Notu”. Yer Dinamikleri Araştırma ve Değerlendirme Koordinatörlüğü. Aktif Tektonik Araştırmaları Birimi, Ankara, Türkiye, 2007.
32. Boğaziçi Üniversitesi Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü Bölgesel Deprem-Tsunami İzleme ve Değerlendirme Merkezi. “Deprem Kataloğu”. http://www.koeri.boun.edu.tr/sismo/zeqdb/ (15.07.2018).
33. Hwang H, Chiu YH, Chen WY, Chen YC, Shih BJ, Liu PS. “Damage analysis of Taichung gas pipelines resulting from the Chi-Chi Taiwan earthquake”. Technical Report, Center for Earthquake Research and Information, Memphis: The University of Memphis, 78, 2002.
34. Campbell KW, Bozorgnia Y. “A comparison of ground motion prediction equations for Arias Intensity and cumulative absolute velocity developed using a consistent database and functional form”. Earthquake Spectra, 28(3), 931-941, 2012.
35. Kramer SL, Mitchell RA. “Ground motion intensity measures for liquefaction hazard evaluation”. Earthquake Spectra, 22(2), 413-438, 2006.
36. Bradley BA. “Correlation of Arias Intensity with amplitude, duration and cumulative intensity measures”. Soil Dynamics and Earthquake Engineering, 78, 89-98, 2015.
37. Wang T, Wu SR, Shi JS, Xin P, Wu LZ. “Assessment of the effects of historical strong earthquakes on large-scale landslide groupings in the Wei River midstream”. Engineering Geology, 235, 11-19, 2018.
38. Urzúa A, Christian JT, Silva R, Bonani A “Rational selection of critical acceleration factors for sliding stability”. Engineering Geology, 183, 241-246, 2014.
39. Abrakhmatov K, Havenith HB, Delvaux D, Jongmans D, Trefois P. “Probabilistic PGA and Arias Intensity maps of Kyrgyzstan (Central Asia)”. Journal of Seismology, 7, 203-220, 2003.
40. Bayrak Y, Çınar H, Öztürk S, Karslı H “Aletsel dönem deprem kataloğu kullanılarak Türkiye için hesaplanan Arias şiddeti haritaları”. Altıncı Ulusal Deprem Mühendisliği Konferansı, İstanbul, Türkiye, 20 Ekim 2007.
41. Travasarou T, Bray JD, Abrahamson NA. “Empirical attenuation relationship for Arias Intensity”. Earthquake Engineering and Structural Dynamics, 32(7), 1133-1155, 2003.
42. Rodriguez-Marek A, Bray JD, Abrahamson NA. “An empirical geotechnical seismic site response procedure”. Earthquake Spectra, 17, 65-87, 2001.
43. Arioglu E, Arioglu B, Girgin C. “Evaluation of liquefaction analyses using Arias Intensity”. Turkish Civil Engineering 17th Technical Congress and Exhibition, Yildiz Technical University, Istanbul, Turkey, 15-17 April 2004.
44. Wilson RC. "Relation of Arias Intensity to magnitude and distance in California". USGS Open-File Rep. 93-556, U.S. Geological Survey, 1993.
45. Siyahi BG, Altaç Z. "Sıvılaşma potansiyelinin tahmininde Arias Şiddeti yöntemi: Kocaeli (17 Ağustos 1999) ve Düzce (12 Kasım 1999) depremleri". Zemin Mekaniği ve Temel Mühendisliği 8. Ulusal Kongresi, İstanbul, Türkiye, 3-6 Ekim 2000.
46. Hwang H, Lina CK, Yehb YT, Chengb SN, Chen KC. “Attenuation relations of Arias intensity based on the Chi-Chi Taiwan earthquake data”. Soil Dynamics and Earthquake Engineering, 24, 509-517, 2004.
47. Danciu L, Tselentis GA. “Engineering ground-motion parameters attenuation relationships for Greece”. Bulletin of the Seismological Society of America, 97(B), 162-183, 2007.
48. Stafford PJ, Berrill JB, Pettinga JR. “New predictive equations for Arias intensity from crustal earthquakes in New Zealand”. Journal of Seismology, 1 (3), 31-52, 2009.
49. Rajabi AM, Khamehchiyan M, Mahdavifar MR, DelGaudio C. “Attenuation relation of Arias intensity for Zagros Mountains region (Iran)”. Soil Dynamics and Earthquake Engineering, 30, 110-118, 2010.
50. Bayrak Y, Çınar H, Öztürk S, Karslı H “Aletsel dönem deprem kataloğu kullanılarak Türkiye için hesaplanan Arias şiddeti haritaları”. 6. Ulusal Deprem Mühendisliği Konferansı, İstanbul, Türkiye, 16-20 Ekim 2007.
51. Konstantinou KI, 2014.”Moment magnitude-rupture area scaling and stress-drop variations for earthquakes in the Mediterranean region”. Bulletin of the Seismological Society of America, 104(5), 1-9, 2014.
52. Allmann BP, Shearer PM. “Global variations of stress drop for moderate to large Earthquakes”. Journal of Geophysical Research, 114, 1-22, 2009.
53. Gülkan P, Kalkan E. “Attenuation modeling of recent earthquakes in Turkey”. Journal of Seismology, 6(3),397-409, 2002.
54. Ulamis K, Kilic R. "Liquefaction potential evaluation of the quaternary alluvium, Western Ankara (Turkey)". Environmental Earth Sciences, 67, 945-958, 2012.
55. Green RA. “Energy-Based evaluation and remediation of liquefiable soils”. PhD Dissertation, Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, USA, 2001.