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Evaluation of damping modification factors for seismic response spectra

Conference Paper


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Abstract


  • Seismic response spectra with structural damping ratio other than nominal 5% (of critical

    damping) are essential for the design and evaluation of structures in performance-based

    seismic engineering. Such response spectra are also essential for the design and evaluation of

    structures with seismic isolation and energy dissipation systems. A number of formulations

    for damping modification factors (DMF) have been proposed in the literature for scaling the

    5% damped response spectra. Dependence of the DMF on several ground motion parameters

    has also been identified. Few seismic design codes have already incorporated simplified

    DMF based on these studies. This paper critically reviews the available formulations for

    DMF for seismic response spectra. Analytical investigations on the ground motion response

    spectra at soil sites, based on a wide range of simulated ground motion records, have been

    carried out. It has been observed that the DMF for ground motion response spectra at soil

    sites is significantly dependent on site period, which has not been identified in previous

    studies. The influences of earthquake shaking level, earthquake source-site distance (nearfield

    and far-field events), soil plasticity index, and the rigidity of bedrock have also been

    investigated.

UOW Authors


  •   Sheikh, M Neaz.
  •   Tsang, Hing Ho (external author)
  •   Yaghmaei-Sabegh, Saman (external author)
  •   Anbazhagan, P (external author)

Publication Date


  • 2013

Citation


  • Sheikh, M. Neaz., Tsang, H., Yaghmaei-Sabegh, S. & Anbazhagan, P. (2013). Evaluation of damping modification factors for seismic response spectra. In S. Anderson (Eds.), Australian Earthquake Engineering Society Conference 2013 (pp. 1-13). Tasmania: Australian Earthquake Engineering Society.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2994&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1985

Start Page


  • 1

End Page


  • 13

Place Of Publication


  • Tasmania

Abstract


  • Seismic response spectra with structural damping ratio other than nominal 5% (of critical

    damping) are essential for the design and evaluation of structures in performance-based

    seismic engineering. Such response spectra are also essential for the design and evaluation of

    structures with seismic isolation and energy dissipation systems. A number of formulations

    for damping modification factors (DMF) have been proposed in the literature for scaling the

    5% damped response spectra. Dependence of the DMF on several ground motion parameters

    has also been identified. Few seismic design codes have already incorporated simplified

    DMF based on these studies. This paper critically reviews the available formulations for

    DMF for seismic response spectra. Analytical investigations on the ground motion response

    spectra at soil sites, based on a wide range of simulated ground motion records, have been

    carried out. It has been observed that the DMF for ground motion response spectra at soil

    sites is significantly dependent on site period, which has not been identified in previous

    studies. The influences of earthquake shaking level, earthquake source-site distance (nearfield

    and far-field events), soil plasticity index, and the rigidity of bedrock have also been

    investigated.

UOW Authors


  •   Sheikh, M Neaz.
  •   Tsang, Hing Ho (external author)
  •   Yaghmaei-Sabegh, Saman (external author)
  •   Anbazhagan, P (external author)

Publication Date


  • 2013

Citation


  • Sheikh, M. Neaz., Tsang, H., Yaghmaei-Sabegh, S. & Anbazhagan, P. (2013). Evaluation of damping modification factors for seismic response spectra. In S. Anderson (Eds.), Australian Earthquake Engineering Society Conference 2013 (pp. 1-13). Tasmania: Australian Earthquake Engineering Society.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2994&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1985

Start Page


  • 1

End Page


  • 13

Place Of Publication


  • Tasmania