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Application of base-line correction methods to obtain permanent displacements of a near-source ground motion: The 2003 bam earthquake

Jafarzadeh, F ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1080/13632460802597562
  3. Publisher: 2009
  4. Abstract:
  5. In this article, two base-line correction methods for correcting the near-source strong motions were studied on the near-source recording of the 2003, Bam earthquake. To obtain permanent ground displacements at Bam station, two methods were applied with some modifications and without using any kind of filtering. Even though it is difficult to calculate true permanent displacements from data attained by present accelerograms, the results of this study show that the rational limit of permanent ground displacements can be successfully achieved by rational choosing of effective parameters. In addition, it is observed that some pre-processing steps suggested in literature have no considerable influences on the final results. For more rationally choosing the parameters influencing calculation of permanent displacement, the velocity trace must be paid more attention, and consideration of Specific Energy Density may be useful for better estimating the effective parameters. Finally, using suggested methods, a good agreement between results of base-line correction process and real reported permanent displacements of Bam earthquake is observed
  6. Keywords:
  7. Accelerograms ; Bam earthquake ; Base-line correction ; Correction method ; Effective parameters ; Ground motions ; Near-source strong motions ; Permanent displacement ; Permanent displacements ; Permanent ground displacement ; Pre-processing step ; Specific energy density ; Strong motion ; Earthquake resistance ; Parameter estimation ; Earthquakes
  8. Source: Journal of Earthquake Engineering ; Volume 13, Issue 3 , 2009 , Pages 313-327 ; 13632469 (ISSN)
  9. URL: https://www.tandfonline.com/doi/full/10.1080/13632460802597562