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http://dx.doi.org/10.7843/kgs.2008.24.8.137

A Study on the Dynamic Lateral Displacements of Caisson Quay Walls in Moderate Earthquake Regions  

Park, Keun-Bo (School of Civil & Env. Eng., Yonsei. Univ.)
Sim, Jae-Uk (Kolon E&C)
Cha, Seung-Hun (Ssangyong Eng. & Con. Co., LTD.)
Kim, Soo-Il (School of Civil & Env. Eng., Yonsei. Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.8, 2008 , pp. 137-148 More about this Journal
Abstract
In this study, 28 earthquake records with magnitudes from 5.3 to 7.9 are selected for dynamic analysis in order to assess applicability of the earthquakes for domestic seismic design. The assessment is performed using the seismic spectrum analysis of energy and acceleration. Based on results of the analysis, four acceleration time histories, which satisfy the Korean design standard response spectrum, are proposed. From the dynamic analysis using earthquake magnitudes from 6.4 to 7.9, it is found that horizontal displacements corresponding to earthquake magnitudes greater than 7 are two times larger than those with magnitude 6.5. Therefore, it can be stated that use of strong earthquakes, such as Miyagiken-ken-oki earthquake (Ofunato, $M_{JMA}=7.4$) and Tokachi-oki earthquake (Hachinohe, $M_{JMA}=7.9$), for the seismic design in Korea is not applicable, and may prove to be excessively conservative due to overestimated seismic force. From the dynamic analyses using the proposed acceleration time histories, effects of caisson quay wall dimension and the subsoil condition are investigated as well. The simplified design charts to evaluate horizontal displacements of caisson quay wall are also proposed based on earthquake magnitude 6.5 that is appropriate in Korea.
Keywords
Energy; Lateral displacement; Seismic magnitude; Standard design response spectrum;
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