Study on Inelastic Displacement Ratio Spectra for Near-fault Pulse-type Ground Motions

In displacement-based seismic design, inelastic displacement ratio spectra (IDRS) are particularly useful for estimating the maximum lateral inelastic displacement demand of a nonlinear SDOF system from the maximum elastic displacement demand of its counterpart linear elastic SDOF system. This study investigates the characteristics of IDRS for near-fault pulse-type ground motions based on a great number of earthquake ground motions. The influence of site conditions, ratio of peak ground velocity (PGV) to peak ground acceleration (PGA), the PGV, and the maximum incremental velocity on IDRS are also evaluated. Results indicate that the effect of near-fault ground motions on IDRS are significant only at periods between 0.2-1.5s, where the amplification can approach 20%. The PGV/PGA ratio has the most significant influence on IDRS among the parameters considered. It is also found that site conditions only slightly affect the IDRS.

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  • Authors:
    • Changhai, Zhai
    • Shuang, Li
    • Lili, Xie
    • Yamin, Sun
  • Publication Date: 2007-12


  • English

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  • Accession Number: 01099401
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 21 2008 7:06AM