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자료유형
학술저널
저자정보
저널정보
한국지진공학회 한국지진공학회 논문집 한국지진공학회논문집 제18권 제2호
발행연도
2014.1
수록면
89 - 94 (6page)

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Spatial variations of a seismic wave are mainly wave passage and wave scattering. Wave passage effect is produced by changedcharacteristics of exciting seismic input motions applied to the bedrock. Modified input motions travel horizontally with time differencesdetermined by apparent shear wave velocity of the bedrock. In this study, wave passage effect on the seismic response of astructure-soil system is investigated by modifying the finite element software of P3DASS (Pseudo 3-Dimensional Dynamic Analysis of aStructure-soil System) to apply inconsistent (time-delayed) seismic input motions along the soft soil–bedrock interface. Study resultsshow that foundation size affected on the seismic response of a structure excited with inconsistent input motions in the lower periodrange below 0.5 seconds, and seismic responses of a structure were decreased considerably in the lower period range around 0.05seconds due to the wave passage. Also, shear wave velocity of the bedrock affected on the seismic response of a structure in the lowerperiod range below 0.3 seconds, with significant reduction of the seismic response for smaller shear wave velocity of the bedrockreaching approximately 20% for an apparent shear wave velocity of 1000m/s at a period of 0.05 seconds. Finally, it is concluded thatwave passage effect reduces the seismic response of a structure in the lower period range when the bedrock under a soft soil is soft orthe bedrock is located very deeply, and wave passage is beneficial for the seismic design of a short period structure like a nuclearcontainer building or a stiff low-rise building.

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