Ground Motion Prediction Equation for Inelastic Spectral Displacement in Iran

Authors

1 Shahid Beheshti University

2 Iran University of Science & Technology

3 Building and Housing Research Center

Abstract

This paper is devoted to investigate the inelastic displacement spectra compatible to Iran.  Owing to inadequacy of code-compliant elastic design spectra to predict structural damage during sever earthquakes, different approaches are proposed to overcome this problem. Inelastic design spectrum is one of the most well-known methods introduced by researchers. In practice, attenuation relationships can be used in probabilistic seismic hazard analysis to obtain the inelastic design spectrum. In this paper a new ground motion prediction equation has been proposed for inelastic spectral displacement. In this regard, 806 horizontal ground motions are utilized with magnitudes ranging from 4 to 7 and epicentral distances less than 200 Km which are obtained from 330 earthquakes in Iran. According to the tectonic condition, Iran zonecan be divided into two parts: Zagrosand Alborz-central Iran. However, three equations have been presented for the whole country zone, Zagros and Alborz-central Iran zones, separately. The main parameters such as earthquake magnitude, site-source distance and site conditions have been related to the inelastic spectral displacement. Based on average shear wave velocity to a depth of 30m, sites have been categorized into three classes. For practical purpose, simplified equations have been proposed to predict inelastic spectral displacements for Iran. 

Keywords

Scientia Iranica
Volume 24, Issue 1 - Serial Number 1
Transactions on Mechanical Engineering (B)
February 2017
Pages 164-182

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History

  • Receive Date: 14 October 2014
  • Revise Date:
  • Accept Date: 27 July 2017

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