SEISMIC STABILITY ANALYSIS OF ROCKFILL DAMS

Seismic conditions considerably affect the stability of a rockfill dam in current design method. Thus in the present study pseudo-static analyses are conducted for a typical dam with a central impervious wall by means of a limit equilibrium method and an upper-bound limit analysis (Rigid-plastic finite element method is herein employed). The safety factor in limit equilibrium, stability factor in limit analysis, and seismic coefficient are discussed first. It is confirmed that stability can be evaluated well by taking the stability factor Ns as a parameter and by the independent use of the safety factor for the frictional strength. Ns is defined as a funcion of the finite value of cohesion, which is normally neglected for the rockfills. The effects of the apparent cohesion on stability are then illustrated by employing a nonlinear strength envelope. A useful chart is presented to address the critical slope and the critical seismic coefficient for the given Ns. (A)

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Authors:
    • Kikusawa, M
  • Publication Date: 1990-6

Language

  • Undetermined

Media Info

  • Pagination: p. 201-210
  • Serial:
    • GEOTECHNIQUE
    • Volume: 40
    • Issue Number: 2
    • Publisher: Thomas Telford Limited
    • ISSN: 0016-8505

Subject/Index Terms

Filing Info

  • Accession Number: 00606888
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM