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http://dx.doi.org/10.5000/EESK.2017.22.1.001

A Study on the Damping Correction Factors for the Korean Standard Design Spectrum  

Heo, Tae Min (Department of Civil and Environmental Engineering, Seoul National University)
Kim, Jung Han (School of Urban, Architecture and Civil Engineering, Pusan National University)
Lee, Jin Ho (Department of Ocean Engineering, Pukyong National University)
Kim, Jae Kwan (Department of Civil and Environmental Engineering, Seoul National University)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.22, no.1, 2018 , pp. 1-14 More about this Journal
Abstract
In this study, we develop and propose damping correction factors for the Korean standard design spectra. The newly proposed Korean standard design spectra has been given only for 5% damping ratio. But in practice, engineers need design spectra for damping values other than 5%. To obtain design spectra for various damping values from the standard spectra, damping correction factors are derived. These factors modify the shape of design spectra in accordance with the damping ratio. Response spectra for various damping values are calculated from the earthquake records that had been used to calculate standard design spectra. They consist of 55 records from 18 earthquakes occurred in overseas intraplate regions and Korea. The regressed spectra for the damping values ranging from 0.5% to 50 % are compared with standard spectra at three regions acceleration, velocity and displacement sensitive regions. The regression analysis of these data rendered formula for damping correction factors. Finally, a single formula for damping correction factors is recommended that is valid for both horizontal and vertical design spectra and that is applicable to the entire range of periods. One thing to note that recommended damping correction factors is valid for the design spectrum of the rock grounds because the design spectra was developed based on the earthquake records of the rock ground.
Keywords
Seismic design; Korea standard design spectra; Damping ratio; Damping correction factors; Damping factor; Regression analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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