DOI QR코드

DOI QR Code

Dynamic Characteristics of the Box Structure in Multi-layered Ground Under Earthquake Load

지진하중을 받는 다층지반내 박스구조물의 동적 특성

  • Kim, In Dae (Kyong-Ho Engineering & Architects.) ;
  • Shin, Eun Chul (Department of Civil and Environmental Engineering, Incheon National Univ.) ;
  • Park, Jeong Jun (Incheon Disaster Prevention Research Center, Incheon National Univ.)
  • Received : 2020.03.03
  • Accepted : 2020.03.21
  • Published : 2020.03.30

Abstract

In this study, a scaled model test of the shaking table and a seismic analysis considering effective stresses were performed to reveal the dynamic behavior characteristics of box structures deep located in multi-layered soils upon seismic loading. The input seismic wave was operated below the ground using five seismic waves, including long period wave (Hachinohe), short period wave (Ofunato), artificial wave and real earthquakes that occurred in Gyeong-ju and Po-hang. As a result of model test and numerical analysis, the vertical displacement of box structures upon seismic loading was greater than that of horizontal direction, and it was confirmed that an increase of excess pore water pressure below the foundation ground caused a displacement. In addition, behavior of the ground and structures during artificial seismic wave appeared to be larger than real earthquake wave.

본 연구에서는 다층으로 구성된 깊은 토사지반 내 박스구조물에 대하여 지진하중이 작용할 때 동적거동 특성을 규명하기 위하여 진동대를 이용한 축소모형시험과 유효응력을 고려한 내진해석을 수행하였다. 입력지진파는 장주기파(Hachinohe), 단주기파(Ofunato)와 인공지진파 및 최근 경주 및 포항지역에서 발생한 실지진파 등 5개의 지진파를 사용하여 하부지반에서 작용시켰다. 모형실험 및 수치해석 분석결과, 지진하중 작용시 박스구조물에 발생하는 변위는 연직방향이 수평방향에 비해 크게 발생하였으며, 기초지반 하부의 과잉간극수압 증가가 변위를 유발하는 것으로 확인하였다. 또한, 실지진파에 비해 인공지진파 작용시 지반 및 지중구조물의 동적거동이 크게 나타났다.

Keywords

References

  1. Byrne, P. (1991), "A Cyclic Shear-Volume Coupling and Pore-Pressure Model for Sand", Proceedings of Second International Conference on Recent advances in Geotechnical Earthquake Engineering and Soil Dynamics, The University of Missouri-Rolla, No.1.24, pp.47-55.
  2. Hwang, J. I., Kim, S. R. and Kim, M. M. (2004), "Applicability of Similitude Laws for 1-g Shaking Table Tests", Journal of the Korea Geotechnical Socity, Vol.20, No.3, pp.130-141.
  3. Iai, S. (1989), "Similitude for Shaking Table Tests on Soil- Structure-Fluid Model in 1g Gravitational Field", Soils and Foundations, Vol.29, No.1, pp.105-118. https://doi.org/10.3208/sandf1972.29.105
  4. Inagaki, H., Iai, S., Sugano, T., Yanazaki, H. and Inatomi, T., (1996), "Performance of Caisson type Quay Walls at Kobe Port", Japanese Geotechnical Society, pp.119-136.
  5. Kang, G. C. (2011), "Behavior of Buried Geo-Structures due to Increase of Excess Pore Water Pressure Ratio During Earthquakes", Journal of the Korea Geotechnical Socity, Vol.27, No.12, pp.27-37.
  6. Kim, S. Y. and Kim, D. H. (2017), "Seismic Risk Analysis of Quay wall Considering Effective Stress", Journal of Korean Society of Coastal and Ocean Engineers, Vol.29, No.1, pp.1-11. https://doi.org/10.9765/KSCOE.2017.29.1.1
  7. Ministry of Oceans and Fisheries (2014), Engineering standards Commentaries Port and Harbor Facilities. (in Korean)
  8. Park, I. J., Kim, S. W., Jang, W. H., Kim, H. T. and Yoo, C. H. (2006), "Evaluation of Seismic Performance for Reservoir Dams in Korea", Journal of the Korean Geoenvironmental Society, Vol.7, No.6, pp.89-100.
  9. Roscoe, K. H. (1968), "Soils and model tests", Proc. of Instruction of Mechanical Engineers, Journal of Strain Analysis, Vol.3(1), pp.57-64.
  10. Scott, R. F. (1989), "Cambridge geotechnical centrifuge operation", Geotechnique, Vol.30(3), pp.227-268. https://doi.org/10.1680/geot.1980.30.3.227
  11. Shin, E. C., Kang, H. H., Kim, T. J., Chae, Y. S. and Park, J. J. (2011), "Experimental Study on Seismic Performance Evaluation of Lake Dike Structures under Earthquake Loading", Journal of the Korean Geosynthetics Society, Vol.10, No.3, pp.53-62. https://doi.org/10.12814/JKGSS.2011.10.3.053
  12. Tran, N. X., Lee, J. S. and Kim, S. R. (2017), "Evaluation of Seismic Performance of Takahama Wharf Using Nonlinear Effective Stress Analysis", Journal of the Korea Geotechnical Socity, Vol.33, No.4, pp.47-56.
  13. Whitman, R. V. and Liao, S. (1985), "Seismic design of retaining wall", Miscellaneous paper GL-85-I, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
  14. Yoon, W. S., Chae, Y. S. and Park, M. G. (2011), "Evaluation of the Seismic Stability of Fill Dam by Shaking Table Tests", Journal of the Korean Geosynthetics Society, Vol.4, No.4, pp.81-92.