Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
권호 표지
DOI QR코드

DOI QR Code

Development of Load and Resistance Factor Design of Mound Breakwater Against Circular Failure

경사식 방파제 원호파괴에 대한 하중저항계수 설계법 개발

  • Kim, unghwan (Department of University Innovation, Incheon National University) ;
  • Huh, Jungwon (Department of Ocean Civil Engineering, Chonnam National University) ;
  • Lee, Kicheol (Department of Civil and Envirionmental Engineering, Incheon National University) ;
  • Kim, Dongwook (Department of Civil and Envirionmental Engineering, Incheon National University)
  • Received : 2019.11.19
  • Accepted : 2019.12.13
  • Published : 2019.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

Load and resistance factor design of mound breakwater against circular failure was developed in this study. To achieve the goal, uncertainties of parameters of soils, mound, and concrete cap were determined. Eight design cases of domestic mound breakwaters were collected and analyzed. Monte Carlo Simulation was implemented to determine the most critical slip surfaces of the design cases. Using the results of Monte Carlo Simulation, First-Order Reliability Method (FORM) was used to perform reliability analyses. Optimal load and resistance factors were calculated using the reliability analysis results and final load and resistance factors were proposed based on the calculated optimal factors.

본 연구에서는 경사식 방파제의 원호활동에 대한 하중저항계수 설계법을 개발하였다. 이를 위하여 국내 8개의 경사식 방파제의 설계 자료를 수집하였으며, 지반의 강도 및 단위중량, 피복제와 상치구조물의 단위중량, 상치구조물 상부에 재하되는 하중의 불확실성을 결정하였다. 다양한 해석변수의 불확실성에 대해 가장 취약한 원호활동면을 찾는 과정을 재현하기 위하여 몬테카를로 시뮬레이션(Monte Carlo Simulation)을 수행하였다. 몬테카를로 시뮬레이션 결과는 신뢰성 분석을 위한 FORM(First-Order Reliability Method) 해석에 사용하였다. 신뢰성 분석 결과를 통해 목표신뢰도 지수에 따른 최적 하중 및 저항계수를 산정하였으며, 산정된 최적 하중 및 저항계수를 이용하여 본 연구에서 개발한 하중 및 저항 계수를 제시하였다.

Keywords

References

  1. AASHTO (2018), LRFD Bridge Design Specifications, American Association of State Highway and Transportation Officials, 8th Edition, Washington, D.C., USA.
  2. Bishop, A. W. (1955), "The use of the slip circle in the stability analysis of slopes", Geotechnique, 5, 7-17. https://doi.org/10.1680/geot.1955.5.1.7
  3. Cherubini, C. (1997), "Data and Considerations on the Variability of Geotechnical Properties of Soils", Proceedings of the International Conference on Safety and Reliability, ESREL97, Lisbon. Vol.2. 1583-1591.
  4. Christiani, E. (1997), Application of Reliability in Breakwater Design, Thesis PhD Hydraulics & Coastal Engineering Laboratory, Department of Civil Engineering, Aalborg University, 1997.
  5. ECS (1994), Eurocode 7:Geotechnical Design-Part I: General Rules. European Committee for Standardization, Central Secretariat, Brussels.
  6. Fenton, G. A. (1990), Simulation and Analysis of Random Fields, Ph.D. Thesis, Princeton University, Princeton, New Jersey.
  7. Foye, K., Scott, B. and Salgado, R. (2006), "Assessment of Variable Uncertainties for Reliability-Based Design of Foundations", Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 132(9), 1197-1207. https://doi.org/10.1061/(ASCE)1090-0241(2006)132:9(1197)
  8. Goda, Y. (1974), New wave pressure formulae for composite breakwater. Copenhagen, ASCE, pp. 1702-1720.
  9. Kim, D. (2008), Load and resistance factor design of slopes and retaining structures, PhD Thesis, Purdue University, West Lafayette, IN, USA.
  10. Kim, S. W. and Suh, K. D. (2018), "Application of reliability design methods to Donghae Harbor Breakwater", Coastal Engineering Journal, Vol.48. Issue 1, 31-57. (in Korean) https://doi.org/10.1142/S0578563406001325
  11. Overseas coastal area development institute of Japan (2018), Technical Standards and Commentary for Port and Harbor Facilities of Japan, Tokyo, Japan.
  12. Santamarina, J. C., Altschaeffl, A. G. and Chameau, J. L. (1992), "Reliability of slopes: incorporating qualitative information (abridgment)", Transportation Research Record 1343.
  13. Takagi, H., Kashihara, H., Esteban, M. and Shibayama, T. (2011), "Assessment of future stability of breakwaters under climate change", Coastal Engineering Journal, Vol.53, No.01, pp.21-39. https://doi.org/10.1142/S0578563411002264