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Seismic hazard assessment for two cities in Eastern Iran

Farzampour, A ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.12989/eas.2015.8.3.681
  3. Publisher: Techno Press , 2015
  4. Abstract:
  5. Iran as one of the countries located on the Alpine-Himalayan seismic belt has recently experienced a few number of catastrophic earthquakes. A well-known index of how buildings are affected by earthquakes is through assessment of probable Peak Ground Acceleration (PGA) and structures' response spectra. In this research, active faults around Kerman and Birjand, two major cities in eastern parts of Iran, have been considered. Seismic catalogues are gathered to categorize effects of surrounding faults on seismicity of the region. These catalogues were further refined with respect to time and space based on Knopoff-Gardner algorithm in order to increase statistical independency of events. Probabilistic Seismic Hazard Analysis (PSHA) has been estimated for each of cities regarding 50, 100, 200 and 500 years of structures' effective life-span. These results subsequently have been compared with Deterministic Seismic Hazard Analysis (DSHA). It has been observed that DSHA not necessarily suggests upper bound of PSHA results. Furthermore, based on spectral Ground Motion Prediction Equations (GMPEs), Uniform Hazard Spectra (UHS) and spectral acceleration were provided for 2% and 10% levels of probability of exceedance. The results show that increasing source-to-site distance leads to spectral acceleration reduction regarding each fault. In addition, the spectral acceleration rate of variation would increase if the source-to-site distance decreases
  6. Keywords:
  7. Life-span effect ; Uniform hazard curves ; Equations of motion ; Faulting ; Hazards ; Seismic design ; Seismic response ; Seismology ; Geophysics ; Hazard curves ; Life span ; Response spectra ; Seismic hazard analysis ; Eastern Iran ; Earthquakes
  8. Source: Earthquake and Structures ; Volume 8, Issue 3 , 2015 , Pages 681-697 ; 20927614 (ISSN)
  9. URL: http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=TPTPJW_2015_v8n3_681