Assessment of Seismic Demands caused by 12 November 2017 Ezgeleh Earthquake (Mw=7.3) in Kermanshah

Document Type : Research Article

Authors

1 Ministry of Roads &Urban Development, Kermanshah,Iran

2 Department of Civil Engineering, Razi University, Kermanshah, Iran

Abstract

A severe earthquake ground motion with a moment magnitude of Mw=7.3 took place in the western part of Iran on 12 November 2017. The main objective of this study is to evaluate the seismic demands of structures under the recent November 12, 2017, Ezgeleh (Mw=7.3) earthquake. For this purpose, we selected the ground motions recorded at Sarpol-e-Zahab, Goorsefid, Kerend, and Javanrood stations that have maximum PGA. Evaluation is conducted by generalized inter-story drift spectra, input energy spectra and ductility demands (μ) computed for selected records. Also, the time evolution of  the frequency-intensity content of selected records is discussed based on the Wavelet Transform (WT). Results showed that the (E-W) components trigger larger inter-story drift demands than those from the (N-S) components. Particularly, it was identified that Sarpol-e Zahab and Goorsefid stations produced inter-story drift demands significantly larger than those at other recording stations. Time-frequency analysis of ground-motions recorded at the Sarpol-e Zahab station shows that there is a transition of energy content of E-W component with lower periods (i.e. 0.25 sec) to moderate periods (i.e.0.50,0.75 sec ) that it has a potential for moving resonance in buildings with short periods between (0.2-0.5 sec). Also, it can be observed that most energies of the N-S component were highly concentrated at a long period band (between 0.9 and 1.5 sec) that is considered as pulse-like. These findings are consistent with the damage observed in Sarpol-e-Zahab and its villages, where many dwellings and buildings collapsed or suffered severe damage during this event have a low fundamental period between )0.2 and 0.5 sec).

Keywords

Main Subjects

References

[1]    Preliminary report on 12th November 2017, magnitude 7.3 earthquake in Sarpol-e Zahab, Kermanshah Province, 5rd Edition, November 2017, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran (in Persian).
[2]    BHRC. last accessed February 2019 n.d, http://smd.bhrc.ac.ir/Portal/en/ Search/ Waveforms.
[3]    A preliminary report on school buildings performance during M 7.3 Ezgeleh, Iran earthquake of November 12, 2017
[4]    L. Cohen, Time-frequency analysis, Prentice Hall PTR Englewood Cliffs, NJ, 1995.
[5]    F. Auger, P. Flandrin, P. Gonçalvès, O. Lemoine, Time-frequency toolbox, CNRS France-Rice University, 46 (1996).
[6]    B. Burke-Hubbard, The world according to wavelets: The story of a mathematical technique in the making, (1998).
[7]    S. Yaghmaei-Sabegh, Time–frequency analysis of the 2012 double earthquakes records in North-West of Iran, Bulletin of earthquake engineering, 12(2) (2014) 585-606.
[8]    S. Yaghmaei-Sabegh, J. Ruiz-García, Nonlinear response analysis of SDOF systems subjected to doublet earthquake ground motions: A case study on 2012 Varzaghan–Ahar events, Engineering Structures, 110 (2016) 281-292.
[9]    M.R. KARAMI, B. Ghanbari, A. Akhaveissy, A new approach to identify active frequencies of dynamic ratcheting-inducing ground motion, (2017).
[10] Yazdani, T. Takada, Wavelet‐Based Generation of Energy‐and Spectrum‐ Compatible Earthquake Time Histories, Computer‐Aided Civil and Infrastructure Engineering, 24(8) (2009) 623-630.
[11] Z. Zhou, H. Adeli, Time‐frequency signal analysis of earthquake records using Mexican hat wavelets, Computer‐Aided Civil and Infrastructure Engineering, 18(5) (2003) 379-389.
[12] P. Naga, M. Eatherton, Analyzing the effect of moving resonance on seismic response of structures using wavelet transforms, Earthquake engineering & structural dynamics, 43(5) (2014) 759-768.
[13] E. Smyrou, İ.E. Bal, P. Tasiopoulou, G. Gazetas, Wavelet analysis for relating soil amplification and liquefaction effects with seismic performance of precast structures, Earthquake Engineering & Structural Dynamics, 45(7) (2016) 1169-1183. 
[14] S. Yaghmaei-Sabegh, Interpretations of ground motion records from the 2017 M w 7.3 Ezgeleh earthquake in Iran, Bulletin of Earthquake Engineering, 17(1) (2019) 55-71.
[15] H.B. Seed, S. HB, EVALUATION OF SOIL LIQUEFACTION EFFECTS ON LEVEL GROUND DURING EARTHQUAKES, (1976).
[16] Asakereh, M. Tajabadipour, Analysis of Local Site Effects on Seismic Ground Response under Various Earthquakes, AUT Journal of Civil Engineering, 2(2) (2018) 227-240.
[17] J.F. Perri, J.M. Pestana, Ground motion analysis with the use of the short- time-response-spectrum, Journal of Earthquake Engineering, 21(3) (2017) 384-410.
[18] M. Hadi, F. Behnamfar, S. Arman, A Shear-based Adaptive Pushover Procedure for Moment-resisting Frames, AUT Journal of Civil Engineering, 2(2) (2018) 183-194.
[19] D.A. Skolnik, J.W. Wallace, Critical assessment of interstory drift measurements, Journal of structural engineering, 136(12) (2010) 1574- 1584.
[20] A.H. Shodja, F.R. Rofooei, Using a lumped mass, nonuniform stiffness beam model to obtain the interstory drift spectra, Journal of Structural Engineering, 140(5) (2014) 04013109.
[21] E. Miranda, S. Akkar, Generalized interstory drift spectrum, Journal of structural engineering, 132(6) (2006) 840-852.
[22] P. Csonka, Simplified analysis for the calculation of multistory frames subjected to wind load, Müszaki Tudományok Osztályának Közleményei, 35(1-3) (1965) 209-229.
[23] A.R. Khaloo, H. Khosravi, Multi-mode response of shear and flexural buildings to pulse-type ground motions in near-field earthquakes, Journal of Earthquake Engineering, 12(4) (2008) 616-630.
[24] D. Yang, J. Pan, G. Li, Interstory drift ratio of building structures subjected to near-fault ground motions based on generalized drift spectral analysis, Soil Dynamics and Earthquake Engineering, 30(11) (2010) 1182-1197.
[25] Alonso-Rodríguez, E. Miranda, Assessment of building behavior under near-fault pulse-like ground motions through simplified models, Soil Dynamics and Earthquake Engineering, 79 (2015) 47-58.
[26] B. Ghanbari, A.H. Akhaveissy, Effects of pulse-like ground motions parameters on inter-story drift spectra of multi-story buildings, International Journal of Structural Engineering, 8(1) (2017) 60-73.
[27] J. Ruiz‐García, E. Miranda, Evaluation of seismic displacement demands from the September 19, 2017 Puebla‐Morelos (Mw= 7.1) earthquake in Mexico City, Earthquake Engineering & Structural Dynamics, 47(13) (2018) 2726-2732.
[28] A.K. Chopra, Dynamics of structures, Pearson Education India, 2007.
[29] G.W. Housner, Limit design of structures to resist earthquakes, in: Proc. of 1st WCEE, 1956, pp. 5.1-5.13.
[30] Y. Chai, P. Fajfar, K. Romstad, Formulation of duration-dependent inelastic seismic design spectrum, Journal of Structural Engineering, 124(8) (1998) 913-921.
[31] Y. Chai, P. Fajfar, A procedure for estimating input energy spectra for seismic design, Journal of Earthquake Engineering, 4(04) (2000) 539- 561.
[32] P. Quinde, E. Reinoso, A. Terán-Gilmore, Inelastic seismic energy spectra for soft soils: Application to Mexico City, Soil Dynamics and Earthquake Engineering, 89 (2016) 198-207.
[33] F.S. Alıcı, H. Sucuoğlu, Elastic and inelastic near-fault input energy spectra, Earthquake Spectra, 34(2) (2018) 611-637.
AUT Journal of Civil Engineering
Volume 4, Issue 1
March 2020
Pages 103-112

Files

Share

How to cite

Statistics