Damping modification factor of the vertical response spectrum

Elhout, Emad

doi:10.1007/s42107-022-00465-5

Cited by 1 publication

(5 citation statements)

References 26 publications

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“…, A, B, C, and D) at damping ratios (ξ) equal to 1%, 3%, 10%, 15%, 20%, 30%, and 40%. The results presented in the figure show that the amplitude of and trend in the DRFs are relatively similar for site classes A and D, as also observed by Elhout [35]. In addition, the same tendency for soil classes B and C is also observed in the DFRa values.…”

Section: The Effect Of Distancesupporting

confidence: 83%

“…In general, at low damping ratios (i.e., 1.0% and 3.0), a greater M w will result in greater DRFs. This situation is reversed at high damping ratios (ξ > 5%), and this trend has also been observed by various researchers [29,32,35,48,49].…”

Section: The Effect Of Distancesupporting

confidence: 82%

“…is reversed at high damping ratios (ξ > 5%), and this trend has also been observed by various researchers [29,32,35,48,49].…”

Section: The Effect Of Distancesupporting

confidence: 81%

“…Based on several studies [32,33,35,36] and the observations in this study, the polynomial function of natural logarithms of the natural vibration period and damping ratio parameters can be used to describe the relations of the DRFs.…”

Section: Nonlinear Regression Of the Mean Drfs Of All The Selected Gr...mentioning

confidence: 99%

“…Elhout [35] studied the influence of the closest distance, site conditions, earthquake magnitude, peak ground acceleration (PGA), and damping ratios on DRFs using 195 real vertical ground motion earthquakes selected from the PEER strong motion database. He indicated that the moment magnitude of an earthquake has a significant impact on DRFs, but the effect of the soil type, distance, and PGA is negligible.…”

Section: Introductionmentioning

confidence: 99%

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The Derivation of Vertical Damping Reduction Factors for the Design and Analysis of Structures Using Acceleration, Velocity, and Displacement Spectra

Rouabeh,

Benahmed,

Palanci

et al. 2024

Applied Sciences

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Damping reduction factors (DRFs) play a vital role in the seismic design of structures. DRFs have been widely studied due to their primary importance to the lateral resistance of structures subjected to earthquakes. On the other hand, devastating earthquakes have occurred all over the world, and recently, the Kahramanmaraş earthquakes in Turkey revealed the import of the vertical component of earthquakes and their impact on structures and infrastructures. Considering the importance of this parameter, this paper aims to develop new damping reduction factor (DRF) equations for the acceleration (DRFa), velocity (DRFv), and displacement spectra (DRFd) of the vertical components of earthquakes. For this purpose, 775 real ground motion records were selected from the Pacific Earthquake Engineering Research (PEER) strong motion database, and the vertical elastic response spectra of selected records were computed according to linear dynamic analysis. Taking the 5%-damped vertical response spectra as the target, the vertical spectral damping reduction factors (DRFa, DRFv, and DRFd) were computed for 1%, 3%, 10%, 15%, 20%, 30%, and 40% damping ratios. The effect of the earthquake magnitude, distance, and soil types on the DRFs was investigated. The results indicated that magnitude, distance, and soil type had no particular effect on the trend in the DRFs. Based on the evaluations, extensive statistical analyses were carried out, and new prediction equations were developed according to the nonlinear regression method. The developed equations were then compared to those found in the literature and seismic design codes. The comparisons proved that the proposed DRFa, DRFd, and DRFv models are strongly compatible with real DRFs and show strong robustness compared to existing models.

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Section: The Effect Of Distancesupporting

confidence: 83%