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2017 Vol.33, Issue 4 Preview Page
Determination of the Coefficient of Variation of Shear Wave Velocity in Rock Filled Zone of CFRD (Concrete Faced Rock Filled Dam) for Reliability Based Analysis

신뢰성 기반 해석을 위한 국내 CFRD 사력존 재료의 전단파 속도 변동계수 결정

Hyung-Choon Park1
,
Heui-Dae Lim2
박 형춘1
,
임 희대2
1Member, Prof., Dept. of Civil Engrg., Chungnam Nat. Univ.
2Member, Engineer, Dept. of Geotechnical Engrg., Sambo Engineering Co., Ltd.
1정회원, 충남대학교 토목공학과 교수
2정회원, 충남대학교 토목공학과 교수
*교신저자. *Corresponding Author. 
30 April 2017. pp. 17-24
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Abstract

.Shear wave velocity (or shear modulus) of rock filled zone of CFRD is very important factor in the evaluation of performance of CFRD under the load such as earthquake. A shear wave velocity profile can be determined by surface wave method but this profile has been uncertainty caused by spatial variation of material property in rock filled zone. This uncertainty in shear wave velocity profile could be evaluated by the reliability based analysis which uses a coefficient of variation of material property to consider uncertainty caused by spatial variation of material property. In this paper, the possible 600 shear wave velocity profiles in rock filled zone of CFRD were generated using the method based on harmonic wavelet transform and 8 shear wave velocity profiles by HWAW method in the field, and the coefficients of variation of shear wave velocity with depth were evaluated for the rock filled zone of CFRD in Korea.

Keywords
CFRD
Shear wave velocity
Coefficient of variation

지진과 같은 외부 하중하에서 CFRD 거동은 사력존의 전단파 속도(또는 전단 탄성계수)분포에 큰 영향을 받는다. 일반적으로 사력존의 전단파 속도 분포는 주상도의 형태로 표면파 시험과 같은 비파괴 시험에 의해 결정될 수 있다. 이때 한정된 수의 실험에서 결정된 전단파 속도 주상도에는 불확실성이 존재하며, 이러한 불확실성은 사력존에 존재 하는 물성치 공간 변동성에 의해 발생하게 된다. 내진 해석과 같은 다양한 해석에서 물성치 변동성에 의해 발생할 수 있는 해석 결과의 불확실성은 신뢰성 기반 해석을 통해 고려될 수 있다. 신뢰성 기반해석에서는 재료 물성치의 변동계수 결정을 통해 이러한 불확실성을 해석에 반영한다. 본 연구에서는 국내 CFRD 사력존을 위한 전단파 속도 변동계수를 결정하였다. 이를 위해 국내 CFRD 사력존에서 결정된 전단파 속도 주상도들과 하모닉 웨이브릿 해석에 기반한 기법을 사용하여 국내 CFRD 사력존에 존재 가능한 600개의 전단파 속도 주상도를 생성하고 이를 이용하여 사력존 전단파 속도 분포의 깊이별 변동계수를 결정하였다

References
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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 33
  • No :4
  • Pages :17-24
  • Received Date : 2017-02-13
  • Accepted Date : 2017-04-19
  • DOI :https://doi.org/10.7843/kgs.2017.33.4.17
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