UNCERTAINTIES IN SEISMIC RISK PROCEDURES

Several issues are addressed in these discussions. It is noted that, seismic risk, evaluated on the basis of peak acceleration, cannot be directly utilized for design of structures. In order to obviate this difficulty, a direct method for estimation of seismic risk that is free from uncertainties of peak acceleration and at the same time could be useful in design of structures incorporating reliable design seismic coefficient alpha is proposed. The misuse of curve 2 in Figure 1 is pointed out. Curve 2 is actually for rock impedence rather than alluvium, which would apply to most of the points and the other curves shown in the figure. Thus, a comparison of curve 2 with other data in Figure 1 is not valid. It is also shown that a better agreement is obtained by using the Gutenberg-Richter method, rather than derivations using extreme value techniques, using the foregoing suggested relationship, for both the data of the authors on San Jose, California, and the data on North Anatikuab Fault zone, Turkey.

  • Availability:
  • Supplemental Notes:
    • Discussion of ASCE Paper 13896 (July 1978).
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Discussers:
    • Guha, S K
    • Padale, J G
    • BLUME, J A
    • Ozaydin, K I
    • Erguvanli, A M
  • Publication Date: 1979-5

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Subject/Index Terms

Filing Info

  • Accession Number: 00196144
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14549 Proceeding
  • Files: TRIS
  • Created Date: Oct 17 1979 12:00AM