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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 781 - 791 (11page)
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초록· 키워드
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To determine the near-surface shear wave velocities (Vs) and characterize seismic site conditions in Gangneung, on the east coast of South Korea, passive and active surface waves were recorded at 136 sites. Dispersion images of the Rayleigh waves were obtained by the spatial autocorrelation method and inverted to Vs models. From these one-dimensional Vs models, the depth to the soft bedrock, average Vs at the top of the bedrock, average Vs of the overburden layer, average Vs in the top 30-m interval (Vs30), and average resonance frequency were estimated to be 16 ± 1 m, 481 ± 14 m/s, 254 ± 5 m/s, 374 ± 16 m/s, and 5.5 ± 0.3 Hz, respectively. A lower estimate for Vs30 and a relatively thick overburden layer make the downtown and agricultural areas in the region more prone to significant ground amplifications. Multiple regression analysis of Vs30 yielded a correlation coefficient of 0.79 with respect to the variables of elevation and topographic slope. Using this proxy-based empirical relationship, Vs30 values were computed at 13,583 sites covering the entire city. A microzonation map, constructed based on the Vs30 data, indicates that the ground in Gangneung is categorized mainly into B (44%), C (39%), and D (15%) National Earthquake Hazards Reduction Program site classes, with minor constituents assigned to the A and E classes.
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참고문헌 (55)
참고문헌 신청
Abdel-Fattah, A. K. / 2007 / Source process and tectonic implication of the January 20, 2007, Odaesan earthquake, South Korea / Physics of the Earth and Planetary Interiors 229:72~81
Aki, K. / 1957 / Space and time spectra of stationary stochastic waves, with special reference to microtremors / Bulletin of Earthquake Research Institute 35:415~456
Allen, T.I. / 2009 / On the use of high-resolution topographic data as a proxy for seismic site conditions(VS30) / Bulletin of the Seismological Society of America 99:935~943
Ansal, A. / 2007 / Source and site factors in microzonation / The 4th International Conference on Earthquake Geotechnical Engineering, Invited Lectures :73~92
Apostolidis, P. / 2004 / Determination of S-wave velocity structure using microtremors and SPAC method applied in Thessaloniki(Greece) / Soil Dynamics and Earthquake Engineering 24:49~67
Aki, K. / 1957 / Space and time spectra of stationary stochastic waves, with special reference to microtremors / Bulletin of Earthquake Research Institute 35:415~456
Allen, T.I. / 2009 / On the use of high-resolution topographic data as a proxy for seismic site conditions(VS30) / Bulletin of the Seismological Society of America 99:935~943
Ansal, A. / 2007 / Source and site factors in microzonation / The 4th International Conference on Earthquake Geotechnical Engineering, Invited Lectures :73~92
Apostolidis, P. / 2004 / Determination of S-wave velocity structure using microtremors and SPAC method applied in Thessaloniki(Greece) / Soil Dynamics and Earthquake Engineering 24:49~67
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