Comparison of near- and far-fault ground motion effect on the nonlinear response of dam-reservoir-foundation systems


BAYRAKTAR A., ALTUNIŞIK A. C. , SEVİM B. , KARTAL M. E. , TÜRKER T., Bilici Y.

NONLINEAR DYNAMICS, vol.58, no.4, pp.655-673, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58 Issue: 4
  • Publication Date: 2009
  • Doi Number: 10.1007/s11071-009-9508-x
  • Title of Journal : NONLINEAR DYNAMICS
  • Page Numbers: pp.655-673
  • Keywords: Concrete arch dam, Concrete faced rockfill dam, Dam-reservoir-foundation interaction, Drucker-Prager model, Far fault ground motion, Finite element method, Near fault ground motion, NEAR-FAULT, EARTHQUAKE ANALYSIS, DYNAMIC-RESPONSE, ROCK INTERACTION, FINITE-ELEMENTS, RECORDS, MODEL, PULSE

Abstract

In this paper, it is aimed to compare the near- and far-fault ground motion effects on the nonlinear dynamic response of dams including dam-reservoir-foundation interaction. Two different types of dams, which are concrete arch and concrete faced rockfill dams, are selected to investigate the near- and far-fault ground motion effects on the dam responses. The behavior of reservoir water is taken into account using Lagrangian approach. The Drucker-Prager material model is employed in nonlinear analyses. Near and far-fault strong ground motion records, which have approximately identical peak ground accelerations, of Loma Prieta (1989) earthquake are selected for the analyses. Displacements, maximum and minimum principal stresses are determined using the finite element method. The displacements and principal stresses obtained from the analyses of dams subjected to each fault effect are compared with each other. It is clearly seen that there is more seismic demand on displacements and stresses when the dam is subjected to near-fault ground motion.