지반-기초-구조물 상호작용을 고려한 말뚝 기초 구조물에서의 지진 하중 평가

유민택^1)*, 하정곤²⁾, 조성배²⁾, 김동수²⁾

¹⁾University of California, Los Angeles, ²⁾한국과학기술원

Evaluation of Seismic Loading of Pile Foundation Structure Considering Soil-foundation-structure Interaction

Min Taek Yoo^1)*, Ha, Jeong Gon²⁾, Jo, Seong-Bae²⁾, Kim, Dong Soo²⁾

¹⁾Department of Civil and Environmental Eng. University
²⁾KAIST

(Received 28 January 2014; Revised 3 April 2014; Accepted 7 April 2014)

Abstract

In this study, a series of dynamic centrifuge tests were performed for a soil-foundation-structural interaction system in dry sand withvarious embedded depths and superstructure conditions. Sinusoidal wave, sweep wave and real earthquake were used as input motionwith various input acceleration and frequencies. Based on the results, a natural period and an earthquake load for soil-structureinteraction system were evaluated by comparing the free-field and foundation accelerations . The natural period of free field is longerthan that of the soil-foundation-structure system. In addition, it is confirmed that the earthquake load for soil-foundation-structuresystem is smaller than that of free-field in short period region. In contrast, the earthquake load for soil-foundation-structure interactionsystem is larger than that of free-field in long period region. Therefore, the current seismic design method, applying seismic loading offree-field to foundation, could overly underestimate seismic load and cause unsafe design for long period structures, such as high-risebuildings.

Key Words : Seismic load,Soil-structure interaction(SSI),Centrifuge test,Group pile foundation

: 0044-01-0018-0003-2.pdf623.0KB

Reference

Journal Abbreviation J. Earthq. Eng. Soc. Korea
Frequency Bimonthly
Doi Prefix 10.5000/EESK
Year of Launching 1997
Publisher Earthquake Engineering Society of Korea

Indexed/Tracked/Covered By

Online Submission

submission.eesk-j.or.kr

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