Adapting Seismic Risk Zonation of The Seismic Design Code of Oil Company Facilities with The Seismic Design Code of Iran

مهندسی عمران فردوسی

Article 3, Volume 38, Issue 1 - Serial Number 49, April 2025, Pages 49-64   

Document Type: Original Article

DOI: 10.22067/jfcei.2024.89947.1322

Authors

Nima Shahbazi^* ; Iman Ashayeri

Civil Engineering Department, Razi University, Kermanshah, Iran

Abstract

The design spectrum presented in the Iranian Seismic Design Code for Petroleum Facilities (Publication-038) is derived from the design spectrum of the US ASCE 7-02 code. It is based on two spectral accelerations SS and S1. Considering that the spectral acceleration values of SS and S1 are not available for the seismic regions of Iran and since the seismic design spectrum in Iran is the code-2800, which is based on the maximum acceleration of bedrock A. In this article, we adapt the seismic design spectrum of Publication-038 with the seismic design spectrum of the code-2800. Thereby, we calculate the values of SS, S1, SDS and SD1 according to the four seismic zones of Iran and based on the four classifications of ground condition in code-2800 and provide the design spectra. in the other part, the evaluation of acceleration transfer coefficients to the ground surface (Fa and Fv) presented in publication-038 is discussed. The results show that the range of these coefficients is not appropriate to the seismic conditions of Iran. Therefore, the suggested range for the mentioned coefficients is presented based on the values of SS, S1 and according to the seismic conditions of Iran. In the other part of this research, the coefficients and relationships used in the publication-038 are evaluated. Investigations show that some of the relations and coefficients used in publication-038 are taken directly from the ASCE 7-02 regulations and based on the results of this study, they are not suitable for the seismic conditions of Iran.

Keywords

Design Spectrum; Iranian Seismic Design Code for Petroleum Facilities; Standard 2800; Spectral acceleration

References

[1]    Iranian Seismic Design Code for Petroleum Facilities, (No.038-16), National Iranian Oil Company, Tehran, Iran, NIOC, 3th edition, 2016.

[2]    ASCE, Minimum design loads for buildings and other structures. (ASCE 7-02), American Society of Civil Engineers., second edition, 2002.

[3]    Iranian Code of Practice for Seismic Resistant Design of Buildings (Standard No. 2800) 4th edition, Building and Housing Research Center, BHRC, Tehran, Iran, 2015.

[4]    F. Omidinasab, “Evaluation of Seismic Design Forces of Liquid Storage Elevated Tanks based on Standard Design 2800 and Publication No. 38 in the Area with very High Relative risk of Earthquake,” Journal of Concrete Structures and Materials, vol. 8, no. 1, pp. 212-231, 2023. https://doi.org/10.30478/jcsm.2023.404123.1333.

[5]    M. A. Barkhordari, M. Zaheri, and M. Ghafarinia, “Comparison of the design code of buildings against earthquakes with the general rules of the code of seismic design of facilities and structures in the oil industry and providing suggestions for modifying the rules,” presented at the An Attitude Towards Earthquake Design Regulations (Standard 2800); Present and future, 2009.

[6]    E. V. Leyendecker, R. J. Hunt, A. D. Frankel, and K. S. Rukstales, “Development of maximum considered earthquake ground motion maps,” Earthquake Spectra, vol. 16, no. 1, pp. 21-40, 2000. https://doi.org/10.1193/1.1586081.

[7]    M. Biglari, I. Ashayeri, and R. Moftizadeh, “Urban planning of Kermanshah city based on the seismic geotechnical hazards,” Journal of Seismology and Earthquake Engineering, vol. 17, no. 3, pp. 203-211, 2015.

[8]    N. N. Ambraseys, J. Douglas, S. Sarma, and P. Smit, “Equations for the estimation of strong ground motions from shallow crustal earthquakes using data from Europe and the Middle East: horizontal peak ground acceleration and spectral acceleration,” Bulletin of earthquake engineering, vol. 3, pp. 1-53, 2005. https://doi.org/10.1007/s10518-005-0183-0.

[9]    M. Zare, “An introduction to applied seismology,” Tehran: International Institute of Earthquake Engineering and Seismology, 2005.

[10]  H. Ghasemi, M. Zare, Y. Fukushima, and K. Koketsu, “An empirical spectral ground-motion model for Iran,” Journal of seismology, vol. 13, pp. 499-515, 2009. https://doi.org/10.1007/s10950-008-9143-x