기후변화에 대응하기 위한 항외곽시설 설계기준 개정에 관한 제언

• 영문명: Preliminary Study on an amendment to the Design Guideline of Outer Port Facilities Against Harsh Wave Conditions due to Climate Change based on Design Fidelity Index
• 발행기관: 한국연안방재학회
• 저자명: 조용준(Yong Jun Cho) 조성희(Sung Hee Cho)
• 간행물 정보: 『한국연안방재학회지』제9권 제1호, 75~89쪽, 전체 15쪽
• 주제분류: 사회과학 > 사회과학일반
• 파일형태: PDF
• 발행일자: 2022.01.31

영문 초록

This study aims to develop an amendment to the design guidelines for the outer port facilities based on quantitative indexes to address harsh wave conditions due to climate change. To this end, the author first looked into the in situ data of damage to outer port facilities collected in about a dozen major ports in Korea, where the outer port facility has failed in fulfilling its intended disaster prevention against typhoons over the last decade. In doing so, the design fidelity index, a quantitative index that can rationally determine the scope of reinforcement of outer port facilities, was developed based on the specified failure mechanism. The design fidelity index evaluates the degree of loss of armoring rocks, erosion of main body of breakwater, displacement of cap-concrete, lee side damage by overtopping, and scouring near the toe, which are the primary failure mode of the outer port facilities, and displays these damage extents of each of 5 primary failure mode in polar coordinates. Among the various failure modes mentioned above, scouring near the toe has been found in most outer port facilities, and as a result, the current design practice like whether to install scouring-prevention work is determined based on the limit depth for the incipient sediment motion needs to be revised. Numerical simulation shows that with sediment motion triggered by harsh water surface displacement in the standing waves formed in front of vertical type breakwater being accounted for, the robustness of scouring prevention works, which takes the maximum scour depth as the maximum wave height, could be secured. In addition, among the various quantitative indexes that can provide information concerned with how robust or vulnerable the outer port facilities would be by adjusting design waves return period, it turns out that the increasing rate of failure probability associated with the unit change in the nominal diameter of armoring rocks could provide most promising results.

목차

1. 서론

2. 우리나라 인근 해역에서의 태풍 이동 경로

3. 해역별 태풍 피해사례 조사⋅분석

4. 항 외곽시설 파괴 기제별 개정안

5. 결론

키워드

Climate change Outer port facilities Design fidelity index Maximum scouring depth Hybrid design Failure probability gradient