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http://dx.doi.org/10.14481/jkges.2011.12.1.9

Characteristics of Vertical/Horizontal Ratio of Response Spectrum from Domestic Ground Motions  

Kim, Junkyoung (세명대학교 소방방재학과)
Publication Information
Journal of the Korean GEO-environmental Society / v.12, no.1, 2011 , pp. 81-87 More about this Journal
Abstract
The characteristics of vertical to horizontal ratio of response spectrum from 20 recent earthquakes were analysed. Response spectrum of 260 horizontal and 130 vertical ground motions were normalized by peak ground acceleration at each resonance frequency from 0.1 to 50Hz. It has been identified that the ratio of vertical to horizontal response spectrum has strong dependancy on epicentral distance and resonance frequency. The ratio of vertical to horizontal response spectrum for the 0-50km epicentral distance group are larger than 2/3 values, which is a standard engineering rule-of-thumb V/H=2/3, at resonance frequency above 7-8Hz. All the 3 groups such as 50-100, 100-150- and 150-200km epicentral distance have shown larger values of vertical to horizontal ratio than 2/3 at resonance frequency above 15Hz and also are larger than 2/3 at resonance frequency below 8-10Hz. Even though there are differences in specific resonance frequency values which depend on the epicentral distance group, we should be careful of seismic design of vertical component of the structures winch are located within the range of about 200km distance. form the potentially seismic causative faults.
Keywords
Response spectrum; Korean Standard Design Response Spectrum; Ratio of vertical to horizontal response spectrum; Reg. Guide 1.60;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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