Structural Evaluation of the February 6, 2023 Türkiye Earthquakes: Comparison of Design Codes and Recorded Seismic Demands

Abstract

Türkiye witnessed devastating earthquakes on February 6, 2023, causing widespread destruction across a wide region. In this study, the seismic impact of these events is evaluated from a structural design perspective. Specifically, the recorded Peak Ground Acceleration (PGA) values and response spectra are presented together with the elastic design acceleration parameters and design spectra prescribed in historical and current building codes. The results revealed that the ground motions experienced in the region may correspond to the highest acceleration values ever recorded. Results show that these findings may contain valuable information for refining Probabilistic Seismic Hazard Analysis (PSHA) and Ground Motion Prediction Equations (GMPEs). Since these methods rely heavily on historical seismicity and empirical strong motion data, the documentation of such extreme intensities provides a critical basis for recalibrating future hazard assessments and revising structural design parameters specified in building regulations.

Keywords

• Earthquake
• equivalent earthquake load
• earthquake spectra
• RC residential buildings
• earthquake code

Supporting Institution

The author has received no financial support for the research, authorship or publication of this study.

Ethical Statement

This study does not require ethics committee approval or any special permission.

6 Şubat 2023 Türkiye Depremlerinin Yapısal Değerlendirmesi: Tasarım Yönetmelikleri ile Kaydedilen Sismik Taleplerin Karşılaştırılması

Abstract

Türkiye, 6 Şubat 2023 tarihinde geniş bir bölgede yaygın yapısal hasarlara neden olan yıkıcı depremlere sahne olmuştur. Bu çalışmada, söz konusu olayların sismik etkileri yapısal tasarım perspektifinden değerlendirilmiştir. Özellikle, kaydedilen En Büyük Yer İvmesi (PGA) değerleri ve tepki spektrumları; geçmiş ve yürürlükteki bina yönetmeliklerinde öngörülen elastik tasarım ivme parametreleri ve tasarım spektrumları ile birlikte sunulmuştur. Sonuçlar, bölgede yaşanan yer hareketlerinde oluşan ivmelerin, bugüne kadar kaydedilen en yüksek ivme değerlerine karşılık gelebileceğini ortaya koymuştur. Elde edilen bu bulgular, Olasılıksal Sismik Tehlike Analizi (PSHA) ve Yer Hareketi Tahmin Denklemlerinin (GMPE) iyileştirilmesi adına değerli bilgiler içermektedir. Bu yöntemler büyük ölçüde tarihsel sismisiteye ve ampirik yer hareketi verilerine dayandığından; bu denli sıra dışı düzeydeki yer hareketlerinin belgelenmesi, gelecekteki tehlike değerlendirmelerinin yeniden kalibre edilmesi ve bina yönetmeliklerinde belirtilen yapısal tasarım parametrelerinin revize edilmesi için kritik bir temel oluşturmaktadır.

Keywords

• Deprem
• eşdeğer deprem yükü
• deprem spektrumları
• BA konut binaları
• deprem yönetmeliği

References

1. AFAD, Turkish Ministry of Interior Disaster and Emergency Management Presidency (2023). Report of Pazarcık-Elbistan Kahramanmaraş (MW: 7.7 – MW: 7.6) Earthquakes on 6 February 2023, Ankara, Türkiye (in Turkish).
2. İnce, O. (2024). Structural damage assessment of reinforced concrete buildings in Adıyaman after Kahramanmaraş (Türkiye) Earthquakes on 6 February 2023. Engineering Failure Analysis, 156, 107799. https://doi.org/10.1016/j.engfailanal.2023.107799
3. Ozturk, M., Arslan, M. H., & Korkmaz, H. H. (2023). Effect on RC buildings of 6 February 2023 Turkey earthquake doublets and new doctrines for seismic design. Engineering Failure Analysis, 153, 107521. https://doi.org/10.1016/j.engfailanal.2023.107521
4. Altunsu, E., Güneş, O., Öztürk, S., Sorosh, S., Sarı, A., & Beeson, S. T. (2024). Investigating the structural damage in Hatay province after Kahramanmaraş-Türkiye earthquake sequences. Engineering Failure Analysis, 157, 107857. https://doi.org/10.1016/j.engfailanal.2023.107857
5. Ivanov, M. L., & Chow, W. K. (2023). Structural damage observed in reinforced concrete buildings in Adiyaman during the 2023 Turkiye Kahramanmaras Earthquakes. Structures, 58, 105578. https://doi.org/10.1016/j.istruc.2023.105578
6. Yıldız, Ö., & Kına, C. (2023). Geotechnical and Structural Investigations in Malatya Province after Kahramanmaraş Earthquake on February 6, 2023. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, 12(3), 686–703. https://doi.org/10.17798/bitlisfen.1282555
7. Binici, B., Yakut, A., Kadas, K., Demirel, O., Akpinar, U., Canbolat, A., Yurtseven, F., Oztaskin, O., Aktas, S., & Canbay, E. (2023). Performance of RC buildings after Kahramanmaraş Earthquakes: lessons toward performance based design. Earthquake Engineering andEngineering Vibration, 22(4), 883–894. https://doi.org/10.1007/s11803-023-2206-8
8. Peker, O., & Altan, M. F. (2024). The effect of errors in structural system design on the structure damaged in 2023 Turkey earthquakes: A case study. Engineering Failure Analysis, 157, 107923. https://doi.org/10.1016/j.engfailanal.2023.107923

9. Güleç, A. (2024). Kahramanmaraş depreminin yığma yapılar üzerindeki etkilerinin araştırılması. Gazi Journal of Engineering Sciences, 9(3), 634–650. https://doi.org/10.30855/gmbd.0705094
10. Kılıç, M. (2023) Investigation of the status of buildings in the risk reduction plans of 10 cities affected by the Kahramanmaraş earthquake and comparison with the situation after the earthquake. Acil Yardım ve Afet Bilimi, 3(2), 49-56.
11. Çambay, E. (2023) Damage assessment of masonry structures in adıyaman province after Kahramanmaraş earthquakes (February 6, 2023), Firat University Journal of Experimental and Computational Engineering, 2(3), 114-123. https://doi: 10.5505/fujece.2023.47955
12. Azak, T. E., & Ay, B. Ö. (2023). Characteristics of building stock in cities affected by the February 6, 2023 Kahramanmaraş earthquakes. Jeoloji Muhendisligi Dergisi, 47(1), 47–66, (in Turkish). https://doi.org/10.24232/jmd.1294425
13. Ünal, H., & Ergüler, Z. A. (2023). The effect of Kahramanmaraş earthquakes on engineering structures in Adıyaman-Gölbaşı settlement area and earthquake-soil interaction. Yerbilimleri/ Earth Sciences, 44, 202–221, (in Turkish). https://doi.org/10.17824/yerbilimleri.1313819
14. Işık, N. S. (2023). Basen ve yakın fay etkilerinin deprem yer hareketi üzerindeki etkileri, Kahramanmaraş Pazarcık depremi antakya kayıtlarının değerlendirilmesi. Jeoloji Mühendisliği Dergisi, 47(1), 67–86, (in Turkish). https://doi.org/10.24232/jmd.1299027
15. Görüm, T., Tanyas, H., Karabacak, F., Yılmaz, A., Girgin, S., Allstadt, K. E., Süzen, M. L., & Burgi, P. (2023). Preliminary documentation of coseismic ground failure triggered by the February 6, 2023 Türkiye earthquake sequence. Engineering Geology, 327, 107315. https://doi.org/10.1016/j.enggeo.2023.107315
16. Özkan, A., Solak, H. İ., Tiryakioğlu, İ., Şentürk, M. D., Aktuğ, B., Gezgin, C., Poyraz, F., Duman, H., Masson, F., Uslular, G., Yiğit, C. Ö., & Yavaşoğlu, H. H. (2023). Characterization of the co-seismic pattern and slip distribution of the February 06, 2023, Kahramanmaraş (Turkey) earthquakes (MW 7.7 and MW 7.6) with a dense GNSS network. Tectonophysics, 866, 230041. https://doi.org/10.1016/j.tecto.2023.230041
17. Wu, F., Xie, J., An, Z., Lyu, C., Taymaz, T., Irmak, T. S., Li, X., Wen, Z., & Zhou, B. (2023). Pulse-like ground motion observed during the 6 February 2023 MW 7.8 Pazarcık Earthquake (Kahramanmaraş, SE Türkiye). Earthquake Science, 36(4), 328–339. https://doi.org/10.1016/j.eqs.2023.05.005
18. Akinci, A., Dindar, A. A., Bal, I. E., Ertuncay, D., Smyrou, E., Cheloni, D. (2024). Characteristics of strong ground motions and structural damage patterns from the February 6th, 2023 Kahramanmaraş earthquakes, Türkiye. Natural Hazards, 121, 1209–1239. https://doi.org/10.1007/s11069-024-06856-y
19. Sucuoglu, H., & Akkar, S. (2013). Basic earthquake engineering: from seismology to analysis and design. (Vol. 9783319010267). Springer International Publishing. https://doi.org/10.1007/978-3-319-01026-7H.
20. Cansız, S. (2022). Türkiye’de kullanılan deprem yönetmeliklerinin özellikleri ve deprem hesabının değişimi. Uluslararası Muhendislik Arastirma ve Gelistirme Dergisi, 14(1), 58–71, (in Turkish). https://doi.org/10.29137/umagd.948025
21. TEC-1975. (1975). Specification for structures to be built in disaster areas (ABYYHY-75), Ministry of Public Works and Settlement. Government of Republic of Türkiye; Ankara, Türkiye.
22. TEC-1998. (1998). Specification for structures to be built in disaster areas; Part III-earthquake disaster prevention (ABYYHY-98), Ministry of Public Works and Settlement, Government of Republic of Türkiye; Ankara, Türkiye.
23. TEC-2007. (2007). Regulations on structures constructed in disaster regions - Turkish Earthquake Code, Ministry of Public Works and Settlement, Government of Republic of Türkiye; Ankara, Türkiye.
24. Earthquake Zone Map (1996) Ministry of Public Works and Settlement, Government of Republic of Türkiye; Ankara, Türkiye.
25. TBEC-2018. (2018). Türkiye Building Earthquake Code, Republic of Türkiye Ministry of Interior Disaster and Emergency Management Authority; Ankara, Türkiye.
26. Earthquake Hazard Map (2018). Republic of Türkiye Ministry of Interior Disaster and Emergency Management Authority; Ankara, Türkiye.
27. TADAS. (2020). Turkish Accelerometric Database and Analysis System, Republic of Türkiye Ministry of Interior Disaster and Emergency Management Presidency (AFAD). Available: https://tadas.afad.gov.tr/list-event
28. Fan, X., Wang, K., & Xiao, S. (2018). Large-scale parallel computation for earthquake response spectrum analysis. Engineering Computations, 35(2), 800–817. https://doi.org/10.1108/EC-08-2016-0294
29. Puglia, R., Russo, E., Luzi, L., Felicetta, C., Pacor, F., & Lanzano, G. (2018). Strong-motion processing service: a tool to access and analyse earthquakes strong-motion waveforms. Bulletin of Earthquake Engineering, 16, 2641–2651. https://doi.org/10.1007/s10518-017
30. TDTH. (2019). Türkiye Earthquake Hazard Maps Interactive Web Application, Republic of Türkiye Ministry of Interior Disaster and Emergency Management Presidency (AFAD). https://tdth.afad.gov.tr/TDTH/main.xhtml
31. FEMA-P-1050-1. (2015). NEHRP Recommended Seismic Provisions For New Buildings and Other Structures: Part 1, Provisions, Building Seismic Safety Council (BSSC), Federal Emergency Management Agency, Washington, D.C., 2015.
32. ASCE/SEI 7-22. (2022). Minimum Design Loads and Associated Criteria for Buildings and Other Structures, American Society of Civil Engineers (ASCE); Reston, Virginia, USA.
33. EN 1998-1. (2004). Eurocode 8: Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for buildings, European Committee for Standardization (CEN); Brussels, Belgium.
34. UBC-85. (1985). Uniform Building Code, International Conference of Building Officials (ICBO); Whittier, California, USA.
35. DM-1986. (1986). Norme tecniche relative alle costruzioni sismiche (Decreto Ministeriale 24 Gennaio 1986), Ministero dei Lavori Pubblici, Gazzetta Ufficiale della Repubblica Italiana; Rome, Italy.
36. ASCE 7-88. (1990). Minimum Design Loads for Buildings and Other Structures, American Society of Civil Engineers (ASCE); New York, USA.
37. ENV 1998-1-1. (1994). Eurocode 8: Design provisions for earthquake resistance of structures - Part 1-1: General rules - Seismic actions and general requirements for structures, European Committee for Standardization (CEN); Brussels, Belgium.
38. Iervolino, I. (2022). Ground-motion observations and probabilistic seismic hazard: frequently asked questions. Seismological Research Letters, 93, 2360–2366.
39. Strasser, F. O., Bommer, J. J., Abrahamson, N. A. (2007). Truncation of the Distribution of Ground-Motion Residuals. Journal of Seismology, 12(1), 79–105.
40. Bradley, B. A., Razafindrakoto, H. N. T., Polak, V. (2017). Ground‐motion observations from the 14 November 2016 MW 7.8 Kaikoura, New Zealand, Earthquake and Insights from Broadband Simulations. Seismological Research Letters, 88(3), 740–756.
41. NIED, National Research Institute for Earth Science and Disaster Prevention (2011). Off the Pacific Coast of Tohoku earthquake, Strong Ground Motion. Japan.
42. ERS, Earthquake Research Committee (2008). Headquarters for Earthquake Research Promotion, The Iwate-Miyagi Nairiku Earthquake in 2008. Japan.