Peak Ground Acceleration on Bedrock (PGA) and Uniform Seismic Hazard Spectra (UHS) for Different Regions of Kashan, Iran
Mohammad Javad Ghasemi Dastjerdi1, Seyed Ali Razavian Amrei2, Gholamreza Ghodrati Amiri3

1Mohammad Javad Ghasemi Dastjerdi, Department of Civil Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord Iran.
2Seyed Ali Razavian Amrei, Department of Civil Engineering, Payame Noor University, Tehran, Iran.
3Gholamreza Ghodrati Amiri, Department of Civil Engineering, Center of Excellence Fundamental Studies Structural Engineering, Iran, University of Science & Technology, Tehran Iran.
Manuscript received on 17 October 2014 | Revised Manuscript received on 24 October 2014 | Manuscript Published on 30 October 2014 | PP: 74-79 | Volume-4 Issue-5, October 2014 | Retrieval Number: E1820104514/14©BEIESP
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Abstract: The present paper was done under the title of peak ground acceleration (PGA) on bedrock and uniform seismic hazard spectra (UHS) for different regions of Kashan city in two hazard levels. A set of seismic sources, historical and instrumental seismicity data of International Institute of Earthquake authoritative books and websites has been collected, which covers the period of the forth century BC until now. Kijko[2000] method has been applied for estimating the seismic parameters considering lack of suitable seismic data, inaccuracy of the available information and uncertainty of magnitude in different periods. The calculations were performed by using the logic tree method. Five weighted attenuation relations were used ;including Ghodrati et al (2007), 0.3, Akkar & Bommer (2010),0.2, Ambraseys et al (1996),0.2, Campbell-Bozorgnia (2000),0.15 and Campbell-Bozorgnia (2009) ,0.15. Meanwhile in order to determine the seismic spectra based on weighted attenuation spectral relations, and also for the reason of being spectral and more suitable with the conditions of the zone, Ambraseys et al (1996), 0.3, Ghodrati Amiri et al (2010), 0.3, Campbell (1997), 0.2 and Berge-Thierry et al (2003),0.2 were used. The SEISRISK III (1987) software was used to calculate the earthquake hazard. The results of this analysis were submitted including the spectra and maps for 10% and 2% PE in 50 years.
Keywords: Seismic Hazard Analysis, Peak Ground Acceleration (PGA), Uniform Seismic Hazard Spectra (UHS), Uniform Spectra, Attenuation Relationships and Kashan.

Scope of the Article: Behaviour of Structures under Seismic Loads