Peak ground accelerations are described in relation to observed, nonlinear soil response from the Northridge, California, earthquake of January 17, 1994. Four attenuation relationships were developed specifically for this earthquake, those being for horizontal and vertical motions and for "soft" and "hard" soil conditions. The findings reveal that within 20 km of the epicenter, seven stations with "soft" soil conditions documented smaller horizontal peak accelerations than expected. No such trend was apparent for the vertical motions. At the "soft" sites where a reduction of peak horizontal acceleration was noted, the peak strains were larger than 10 superscript -3. The widespread nonlinear response of soil in the same general area indicates that the apparent reduction of peak accelerations is most likely due to nonlinear soil response.


  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 725-735
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00726909
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 2 1996 12:00AM