한국지반환경공학회 논문집 (Journal of the Korean GEO-environmental Society)

한국지반환경공학회 (Korean Geo-Environmental Society)
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반복하중을 받는 해양 실트질 모래의 구속압에 따른 3차원 설계파괴곡선 산정

3-Dimensional Design Failure Curve of Marine Silty Sand under Different Confining Pressures Subjected to Cyclic Loading

  • Suwon, Son (Dept. of Architectural and Civil Engineering, Kyungil University) ;
  • Jongchan, Yoon (Dept. of Civil and Environmental Engineering, Pusan National University) ;
  • Jinman, Kim (Dept. of Civil and Environmental Engineering, Pusan National University)
  • 투고 : 2022.11.03
  • 심사 : 2022.11.18
  • 발행 : 2022.12.01
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초록

해양지반에 설치된 구조물은 육상지반에 설치된 구조물과는 달리 해상에서의 파하중, 풍하중, 그리고 조류하중 등과 같은 장기 반복하중을 고려해야 된다. 이에 해양지반에 설치된 구조물을 설계하기 위해서는 장기 반복하중을 받는 지반의 거동을 분석하는 것이 중요하다. 본 논문에서는 반복단순전단시험을 수행하여 구속압에 따른 장기반복하중에 대한 지반거동을 분석하고, 구속압에 따른 파괴특성을 쉽게 확인할 수 있는 3차원 설계파괴곡선을 작성하였다. 분석결과, 동일한 반복전단응력비와 평균전단응력비 조건이어도 구속압에 따라 설계파괴곡선의 위치가 차이가 있었으며, 파괴에 도달하는 반복하중횟수가 구속압에 영향을 받는 것을 확인하였다. 작성한 구속압에 따른 3차원 설계파괴곡선은 구속압에 따른 설계파괴곡선의 경향성과 대략적인 값을 추정할 수 있다.

Unlike structures installed on land, the structures installed on the offshore ground must consider long-term cyclic loads such as wave loads, wind loads and tidal loads at sea. Therefore, it is important to analyze the behavior of the ground subjected to long-term cyclic loads in order to design a structure installed on the ocean ground. In this paper, cyclic simple shear tests were performed to analyze the ground behavior for long-term cyclic loads according to the confining pressure, and a three-dimensional design failure curve was prepared that can easily check the failure characteristics according to the confining pressure. As a result of the analysis, it was confirmed that the position of the design failure curve is different depending on the confining pressure even under the same conditions of the cyclic shear stress ratio and the average shear stress ratio, and the number of cyclic loads reaching failure is affected by the confining pressure. From the created 3-D design failure curve under different confining pressure, the tendency and approximate value of the design failure curve according to the confining pressure can be estimated.

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과제정보

이 논문은 한국연구재단의 지원(과제번호 NRF - 2022R1I1A1A01054495 및 NRF-2020R1H1A2010866)을 받아 수행된 것으로, 이에 깊은 감사를 드립니다.

참고문헌

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