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2023 Vol.22, Issue 2 Preview Page

Research Article

Settlement Evaluation of Caisson-Type Quay Wall Using PSI of Velocity During Earthquake

지진시 속도의 PSI를 활용한 케이슨식 안벽의 침하량 평가

Gichun Kang1
,
Hyunjun Euo2
,
Minje Baek2
,
Hyunsu Yun2
,
Jungwook Choi3
,
Seong-Kyu Yun4*
강 기천1
,
어 현준2
,
백 민제2
,
윤 현수2
,
최 정욱3
,
윤 성규4*
1Associate Professor, Department of Civil Engineering, College of Engineering, Gyeongsang National University, 501 Jinjudae-Ro, Jinju 52828, Republic of Korea
2Graduate Student, Department of Civil Engineering, College of Engineering, Gyeongsang National University, 501 Jinjudae-Ro, Jinju, 52828 Republic of Korea
3Senior Researcher, Korea Concrete Institute, 7-22 Teheran-Ro, Gangnam-gu, Seoul 06130, Republic of Korea
4Member, Research Professor, Engineering, Research Institute, Gyeongsang National University, 501 Jinjudae-Ro, Jinju 52828, Republic of Korea
*Corresponding Author
30 June 2023. pp. 71-83
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Abstract

It is very important to predict the amount of settlement in order to maintain the function of the coastal structure. Finite element analysis methods and real and model experiments are used as methods for this, but this has the disadvantage of requiring a lot of cost and time. Therefore, this study was conducted for the purpose of a simple formula proposal that can easily predict the amount of settlement of the caisson-type quay wall structure. In the research process, after calculating the PSI (Power Spectrum Intensity) of the velocity, the amount of settlement of the structure is calculated by substituting it into the simple formula of the existing gravity breakwater. By comparing and analyzing the amount of settlement of the structure obtained through numerical analysis, it was confirmed that the error between the amount of settlement of the existing simple formula and the amount of settlement of the numerical analysis was large, and it was confirmed that the background could not be considered in the case of the existing simple formula. Therefore, this study proposed a correction factor for the background of the quay wall structure, indicating a simple formula that can obtain the amount of settlement of the caisson-type quay wall structure. Compared to the numerical analysis settlement amount, it was judged that this simple formula had sufficient precision in calculating the caisson-type quay wall settlement amount. In addition, facilities vulnerable to earthquake resistance can be easily extracted in situations where time and cost are insufficient, and it is expected to be used as a screening technique.

Keywords
PSI(Power Spectrum Intensity) of velocity
Amount of settlement
Simple formula
Caisson-type quay wall

해안구조물의 기능 유지를 위해서 침하량을 예측하는 것은 매우 중요하다. 이를 위한 방법으로는 유한요소해석법이나 실물 및 모형실험 등을 들 수 있지만, 이는 비용과 시간이 많이 소요된다는 단점을 가지고 있다. 따라서 본 연구는 케이슨식 안벽구조물의 침하량을 간편하게 예측할 수 있는 간편식 제안을 목적으로 연구가 진행되었다. 연구 진행 과정은 속도의 PSI(Power Spectrum Intensity)를 산정 후, 기존 중력식 방파제의 간편식에 대입하여 구조물의 침하량을 구한다. 이를 수치해석을 통해 얻은 구조물의 침하량과 비교 분석하여 기존 간편식 침하량과 수치해석 침하량 간의 오차가 다소 큰 것을 확인하였고, 이는 기존 간편식의 경우 배후지반에 대해 고려할 수 없었기 때문임을 확인하였다. 따라서 본 연구는 안벽구조물의 배후지반에 대한 보정계수를 제안함으로써 케이슨식 안벽구조물의 침하량을 구할 수 있는 간편식을 나타내었다. 수치해석 침하량과 비교하였을 때, 이 간편식은 케이슨식 안벽 침하량을 산정하는데에 충분한 정밀도를 가지고 있다고 판단하였다. 또한 시간과 비용이 부족한 상황에서 내진성에 취약한 시설을 간편하게 추출할 수 있으며, 스크리닝 기법으로 활용될 수 있을 것으로 기대된다.

References
1
Akira, T. and Naohiro, K. (2011), “Development of a system to diagnose seismic assessment of coastal structures cheaply and easily”, Kinki Regional Information Bureau Kobe Port and Airport Technology Research Office Technology Development Division, No.22, pp.1-6.
2
Atsushi, H. (2015), “Development of a chart-type seismic diagnosis system in the form of a breakwater”, Kinki Regional Information Bureau Kobe Port and Airport Technology Research Office Technology Development Division, No.18, pp.1-5.
3
Iai, S., Kanno, T., Yamazaki, H., Nagao, T., Nozu, A., Ichii, K., Morikawa, Y., Kohama, E., Nishimori, D., Satoh, Y., Tanaka, T., Ebihara, S., Ohmura, T. and Ohmaki, S. (2001), “Damage to Port Facilities and an Airport by the 2000 Tottori-ken-Seibu Earthquake”, Technical Note of the Port and Airport Research Institute, No.1015, pp.126.
4
Iai, S., Matsunaga, T. and Kameoka, T. (1992a), “Strain Space Plasticity Model for Cyclic Mobility”, Soils and Foundations, Vol.32, No.2, pp.1-15. 10.3208/sandf1972.32.2_1
5
Iai, S., Matsunaga, T. and Kameoka, T. (1992b), “Analysis of Undrained Cyclic behavior of sand under anisotropic consolidation”, Soils and Foundations, Vol.32, No.2, pp.16-20. 10.3208/sandf1972.32.2_16
6
Inatomi, T., Zen, K., Toyama, S., Uwabe, T., Iai, S., Sugano, T., Terauchi, K., Yokota, H., Fujimoto, K., Tanaka, S., Yamazaki, H., Koizumi, T., Nagao, T., Nozu, A., Miyata, M., Ichii, K., Morita, T., Minami, K., Oikawa, K., Matsunaga, Y., Ishii, M., Sugiyama, M., Takasaki, N., Kobayashi, N. and Okashita, K., (1995), “Damage to Port and Port-related Facilities by the 1995 Hyogoken-nanbu Earthquake”, Technical Note of the Port and Harbour Research Institute Ministry of Transport Japan, No.857, pp.1208-1223.
7
Kim, S. J., Hwang, W. K., Kim, T. H. and Kang, G. C., (2019), “A Case Study on Earthquake-induced Deformation of Quay Wall and Backfill in Pohang by 2D-Effective Stress Analysis”, Journal of the Korean Geotechnical Society, Vol.35, No.7, pp.15-27.
8
Kim, S. R., Jang, I .S., Chung, C. K. and Kim, M. M. (2004), “Evaluation of Seismic Displacements of Quay Walls Using Newmark Sliding Block Method”, Journal of the Korean Geotechnical Society, Vol.20, No.8, pp.123-133.
9
Kim, Y. J., Kim, D. H., Lee, G. N. and Park, S. W. (2013), “Estimation of Seismic Fragility for Busan and Incheon Harbor Quay Walls”, Journal of Korean Society of Coastal and Ocean Engineers, Vol.25, No.6, pp.412-421. 10.9765/KSCOE.2013.25.6.412
10
Lee, J. S., Park, T. J., Lee, M. G. and Kim, D. S., (2018), “Verification of the Numerical Analysis on Caisson Quay Wall Behavior Under Seismic Loading Using Centrifuge Test”, Journal of the Korean Society of Geotechnical Engineering, Vol.34, No.11, pp.37-70.
11
Nishikiori, Y., Fukunaga, Y. and Miyata, M. (2020), “Study of Estimation Errors obtained by Evaluation Method used for Level-1 Earthquake Ground Motion and their Effect on Deformation of Gravity-type Wharf”, Technical Note of NILIM.
12
Nozu, A. and Iai, S. (2001), “A consideration on the seismic motion index used for immediate damage estimation of the quay”, 2000 Japan Society of Civil Engineers Kanto Branch Technology Research Presentation Summary Collection, Vol.28, pp.18-19.
13
Ohya, Y., Kohama, E., Nozu, A. and Sugano, T. (2013), “A shake table test of breakwater which paid its attention to power spectrum intensity as an earthquake motion evaluation index”, Journal of Japan Society of Civil Engineers B3 (Ocean Development), Vol.69, No.2, I_167-I_172. 10.2208/jscejoe.69.I_167
14
Precise Safety Diagnosis Report of Incheon Port, (2012).
15
Seismological annual report by Korea Meteorological Administration, (2020), p.1.
16
Shear Lock problem WG, FLIP research committee Ⅳ:2008 report on shear lock problem, 2009, 7 (in Japanese).
17
Sone, T., Kuwahara, N., Yamamoto, S., Mizutani, M., Kondo, Morimoto, T., Iai, S. and Ichii, K. (2012), “A Fundamental study on the simple evaluation method of the Seismic performance of breakwaters”, Journal of Japan Society of Civil Engineers B3 (Ocean Development), Vol.68, No.2, I_528-I_533. 10.2208/jscejoe.68.I_528
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 22
  • No :2
  • Pages :71-83
  • Received Date : 2023-05-10
  • Revised Date : 2023-06-21
  • Accepted Date : 2023-06-21
  • DOI :https://doi.org/10.12814/jkgss.2023.22.2.071
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