Correlation of deformation demands with ground motion intensity

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A comprehensive study has been carried out to investigate the correlation between
deformation demands of frame structures and a number of widely cited ground
motion intensity parameters. Nonlinear response history analyses of single-degreeof-
freedom (SDOF) and multi-degree-of-freedom (MDOF) models derived from
sixteen reinforced concrete frames were carried out under a set of eighty ground
motion records. The frames were selected to portray features of typical low-to-mid
rise reinforced concrete structures. The records contained in the ground motion
database were compiled from the recorded ground motions with the intention to
possess a broad range of amplitude, frequency content and duration characteristics
that shift selected frames into various degrees of elastic as well as inelastic response.
Maximum deformation demands of SDOF models and the maximum interstory drift
ratios of MDOF models, response parameters of interest, were computed employing
1280 nonlinear response history analyses. Computed response parameters were
compared with the ground motion intensity parameters employed and correlation
between them were quantified through coefficients of correlation and determination.
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The results revealed that the spectral intensity parameters including spectral
amplitudes over a range of period covering the frame structures have the strongest
correlation and present better relationship with the deformation demands compared
to the intensity parameters that are based on a single amplitude such as PGA, PGV
and spectral acceleration. Besides analytical study, association of ground motion
parameters with observed damage has been investigated and no clear trend has been
observed between the performance of the buildings and the seismic indices.
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Hazım Yılmaz
Correlation of deformation demands with ground motion intensity · 2007 · 145 sayfa.
Danışman: Doç. Dr. Ahmet Yakut
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