Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
권호 표지
DOI QR코드

DOI QR Code

Small Scale Modelling Experiments for Evaluating Lateral Resistance of Block-Type Breakwater II: A Single Block Reinforced with Piles under Cyclic Lateral Loads

블록식 방파제의 수평저항력 평가를 위한 실내모형실험 II : 보강형 싱글블럭의 반복수평 하중에 대한 저항

  • Kang, Gichun (Department of Civil Engineering, College of Engineering, Gyeongsang National University) ;
  • Kim, Jiseong (Department of Cadastre & Civil Engineering, Vision College of Jeonju)
  • Received : 2021.11.22
  • Accepted : 2021.12.08
  • Published : 2021.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In the case of harbor structures, it is important to understand the characteristics of structures that are subjected to repeated loads as they are structures that receive repetitive loads such as wave pressure as well as static loads. In this study, the lateral resistance according to the pile embeded depth of the block breakwater reinforced with piles by cyclic lateral loads was obtained through an model experiment. As the depth of embedment of the pile increased, the lateral resistance showed a tendency to increase. As the load was repeated, the gradient of the lateral resistance gradually appeared to be gentle. The bending moment of the rear pile was larger than that of the front pile. The bending moment of piles in the ground was similar to that when the pile head was free in the cohesionless of Broms (1964).

항만구조물의 경우 정적인 하중 뿐만 아니라 파압과 같이 반복적인 하중을 받는 구조물임에 따라 반복적인 하중을 받는 구조물의 특성을 파악하는 것이 중요하다. 따라서 본 연구는 반복 수평하중에 의한 말뚝으로 보강된 블록식 방파제의 거동특성을 실내모형실험을 통해 구하였다. 말뚝의 근입 깊이가 깊어질수록 수평저항력이 증가하는 경향이 나타났으며, 하중이 반복될수록 수평저항력의 기울기는 점차 완만하게 나타났다. 휨모멘트는 후열말뚝이 전열말뚝보다 크게 나타났다. 지반내에서의 말뚝의 휨모멘트는 Broms(1964)의 사질토지반에서 말뚝두부 자유일 때와 유사하게 나타났다.

Keywords

Acknowledgement

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2020R1I1A3067248). The authors acknowledge Mr. Jiseung Lee for his supports conducting modeling experiments with us.

References

  1. Broms, B. B. (1964), "Lateral Resistance of Piles in Cohesionless Soils", Journal of the Soil Mechanics and Foundations Division, ASCE, Vol.90, No.SM3:123-156. https://doi.org/10.1061/JSFEAQ.0000614
  2. Broms, B. B. (1965), "Design of Laterally Loaded Piles", Proc. ASCE, Vol.91, No.SM 3, pp.79-99.
  3. Davidson, H. L., Cass, P. G., Khilji, K. H. and Mcquade, P. V. (1982), "Laterally loaded drilled pier research", Report EL 2197, EPRI, pp.324.
  4. Goda, Y. (1973), "Study on design wave pressure on breakwater", Report of port and Harbor Res. Inst., Vol.12, No.3, pp.31-69.
  5. Iai, S. (1989). "Similitude for Shaking Table Tests on Soil-Structure-Fluid Model in 1g Gravitational Field", Soil and Foundations, Vol.29, No.1, pp.105-118. https://doi.org/10.3208/sandf1972.29.105
  6. Kang, G., Kim, J., Kim, T. H., Lee, S. and Kim, J. (2021), "Lateral Resistance of Block Type Breakwater with Piles to Depth of Embdement", Journal of Korean Society of Coastal and Ocean Engineers, Vol.33, No.2, pp.65-72. https://doi.org/10.9765/KSCOE.2021.33.2.65
  7. Kim, B. I., Kang, H. H., Kim, H. J. and Han, S. J., (2019), "The Study on Improvement Methods for the Seismic Performance of Port Structures", Journal of Korean Geosynthetics Society, Vol.18, No.4, pp.151-165.
  8. Kim, J., Noh, J. and Kang, G. (2017), "Behaviour Characteristics of Single Pile under Dynamic Lateral Loads", Journal of the Korean Geotechnical Society, Vol.33, No.9, pp.49-60. https://doi.org/10.7843/KGS.2017.33.9.49
  9. Kim, T. H., Kim, J., Choi, J. S. and Kang, G. (2020), "Evaluation of Lateral Resistance for Tie-cell Wave-dissipating Block by Model Experiments", Journal of The Korean Geotechnical Society, Vol.36, No.12, pp.87-97. https://doi.org/10.7843/KGS.2020.36.12.87
  10. Rollins, K. M., Peterson, K. T., and Weaver, T. J. (1998), "Lateral Load Behavior of Full-Scale Pile Group in Clay", Journal of Geotechnical and Geotechnical Engineering, ASCE, Vol.124, No.6, pp.468-478.