Two discussions of a paper with the aforementioned title by Bray, Seed, Cluff, and Seed, published in this journal (Volume 120, Number 3, March 1994), are presented. The first discussion focuses on the pullout of anchor elements installed into a soil stratum as an analogy for fault rupture propagation. The authors' description of the process that yields the final failure surface closely matches Discusser Ghaly's findings. In the second discussion, Tani, Ueta, and Onizuka focus on the authors' statement, "In model tests employing dry sand, base deformations of 1 to 15 percent of the height of the overlying soil layer were required to propagate basal shear ruptures to the ground surface." The discussers have attempted similar physical modeling and have concluded that: 1) the bedrock fault displacement required to rupture the ground surface is dependent on the fault type and 2) the ratio of the height of the sand layer to the particle size has significant influence on the detailed microstructure of the shear zone formation. Discussions are followed by closure from the authors.

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  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Authors:
    • Bray, J D
    • Seed, Raymond B
    • Cluff, L S
    • Seed, H B
  • Discussers:
    • Ghaly, A M
    • Tani, K
    • Ueta, K
    • Onizuka, N
  • Publication Date: 1996-1


  • English

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: p. 79-83
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00716456
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 15 1996 12:00AM