Browse > Article

Reliability Analysis and Evaluation of Partial Safety Factors for Sliding of Caisson Breakwaters in Korea  

Kim, Seung-Woo (Department of Civil and Environmental Engineering, Seoul National University)
Suh, Kyung-Duck (Department of Civil and Environmental Engineering, Seoul National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.21, no.4, 2009 , pp. 278-289 More about this Journal
Abstract
In the present study, we evaluated the target reliability indices and partial safety factors for caisson sliding of a vertical breakwater. The average of the reliability indices of existing breakwaters was proposed as the target reliability index for the breakwater of normal safety level. The target reliability indices of high and low safety levels were also proposed based on the analysis of breakwaters in Korea and Japan. The partial safety factors were then proposed for each safety level by averaging the values calculated for 12 breakwater crosssections in Korea. The appropriateness of the proposed partial safety factors was partly verified by showing that the reliability index calculated by using the present partial safety factors is located between those of mild and steep bottom slopes of JPHA(2007). The proposed partial safety factors were inversely used to calculate the caisson width and reliability index of existing breakwaters. While the reliability indices of existing breakwaters designed by the deterministic method show a large variation, those designed by the partial safety factor method show a small variation. This indicates that the partial safety factor method allows a consistent design for given target probability of failure.
Keywords
Caisson breakwater; Sliding; Reliability index; Partial safety factor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 김승우, 서경덕, 이철응, 박동헌 (2009). 국내 항만의 방파제 피복블록의 신뢰성 해석, 한국해안·해양공학회논문집, 21(1), 15-29
2 포항지방해양항만청 (2008). 울릉(사동)항 남방파제 보강 실시설계 보고서
3 Rackwitz, R. (1976). Practical probabilistic approach to design, Bulletin 112, Comite European du Beton, Paris, France
4 울산지방해운항만청 (1989). 울산항 방파제 실시설계 용역보고서
5 동해지방해운항만청 (1991). 동해항 개발 실시설계 용역 보고서
6 인천지방해운항만청 (1995). 화순항 방파제 및 기타공사 실시설계 용역 보고서
7 해양수산부 (2005). 항만 및 어항 설계기준
8 Takahashi, S., Shimosako, K., and Kimura, K., Suzuki, K. (2000). Typical failure of composite breakwaters in Japan, Proc. 27th Int. Coast. Engrg. Conf., ASCE, 1899-1910
9 Goda. Y. and Takagi, H. (2000). A reliability design method of caisson breakwaters with optimal wave heights, Coastal Eng. J., 42, 357-387
10 Takayama, T. and Ikeda, N. (1992). Estimation of sliding failure probability of present breakwaters for probabilistic design, Report of the Port and Harbour Research Institute, vol.31, No.5
11 Goda, Y. (1974). A new method of wave pressure calculation for the design of composite breakwater, Proc. 14th International Conference on Coastal Engineering, ASCE, Copenhagen, 1702-1720
12 van der Meer, J.W., d'Angremond, K. and Juhl, J. (1994). Probabilistic calculations of wave forces on vertical structures. Proceeding 23th International Conference on Coastal Engineering, ASCE, Kobe, Japan
13 Yoshioka, T. and Nagao, T. (2005). Level-1 reliability-based design method for gravity-type special breakwaters, Research report of NILIM
14 Oumeraci H., Kortenhaus A., Allsop W., de Groot M., Crouch R., Vrijling H., Voortman H. (2001). Probabilistic design tools for vertical breakwaters, Sweta & Zeitlinger B.V., Lisse
15 Nagao, T., Kadowaki, Y., and Terauchi, K. (1995). Evaluation of safety of breakwaters by the reliability based design method (1st report: Study on the safety against sliding), Rep. of the Port and Hab. Res. Inst., 34(5), 40-70 (in Japanese)
16 JPHA (2007). Japan Port and Harbor Association, Technical Standards and Commentaries of Port and Harbor Facilities in Japan (in Japanese)
17 도화종합기술공사 (1986). 옥계항만 개발 기본설계 보고서
18 US Army Corps of Engineers (2006). Coastal Engineering Manual, U.S. Army Corps of Engineers, Washington, D.C. (in 6 volumes)