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

Articles in Press

Document Type : Original Article

Authors

• Nima Shahbazi ¹
• Iman Ashayeri ²

¹ Ph.D. Student, Civil Engineering Department, Razi University, Kermanshah, Iran

² Ph.D., Associate Professor, Civil Engineering Department, Razi University, Kermanshah, Iran

10.22067/jfcei.2024.89947.1322

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

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