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세션2: 스마트시티 P2-01_ 수치해석과 원심 모형실험을 통한 보수된 케이슨식 안벽의 동적 거동 평가_NGUYEN ANH DAN 수정
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조회 120회 작성일 22-05-10 17:33
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기존 케이슨형 안벽의 증심 시 구조적 안정성을 확보하기 위해 특정 형태와 범위의 케이슨 하부 사석마운드에 그라우트를 주입하여 혁신적으로 보수할 수 있다. 그 후, 전면 수심을 늘리기 위해 사석마운드의 일부를 굴착한다. 본 논문은 원심모형실험과 수치해석을 이용하여 기존 안벽의 변형과 비교하여 지진하중을 받는 개축된 안벽의 변형을 평가하여 제안된 기술을 검증하였다. 1/120 축척의 두 가지 원심모형모델을 리노베이션 전후에 대해 제작하고 실험을 수행하였다. PLAXIS 2D 유한 요소(FE) 프로그램을 사용하여 원심모형실험의 수치적 분석도 수행하였다. 실험 결과와 수치해석 결과가 잘 일치함을 보여주었고 리노베이션 후 케이슨의 거동이 안정성이 증가하고 관련 변위가 크게 감소하는 방형으로 개선되어 제안된 기술의 타당성을 확보하였다.
The caisson-type quay walls can be renovated by injecting grout into the rubble mound beneath the front toe of the caisson to secure its structure. Subsequently, a portion of the rubble mound is excavated to increase the front water depth. This paper reports the results of an investigation of the seismic behavior of a renovated quay wall in comparison to that of an existing quay wall using centrifuge tests and numerical simulations. Two centrifuge model tests at a scale of 1/120 were conducted on the quay walls before and after renovation. In addition, systematic numerical analyses of the centrifuge model tests were also conducted with the PLAXIS 2D finite element (FE) program using a nonlinear elastoplastic constitutive model. The results demonstrated that the motion of the caisson changed after renovation, and its displacement decreased significantly. The comparison between the FE models and centrifuge test results showed good agreement. This indicated that renovation was technically feasible.
The caisson-type quay walls can be renovated by injecting grout into the rubble mound beneath the front toe of the caisson to secure its structure. Subsequently, a portion of the rubble mound is excavated to increase the front water depth. This paper reports the results of an investigation of the seismic behavior of a renovated quay wall in comparison to that of an existing quay wall using centrifuge tests and numerical simulations. Two centrifuge model tests at a scale of 1/120 were conducted on the quay walls before and after renovation. In addition, systematic numerical analyses of the centrifuge model tests were also conducted with the PLAXIS 2D finite element (FE) program using a nonlinear elastoplastic constitutive model. The results demonstrated that the motion of the caisson changed after renovation, and its displacement decreased significantly. The comparison between the FE models and centrifuge test results showed good agreement. This indicated that renovation was technically feasible.
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- P2-01_Anh-Dan Nguyen.pdf (1.2M) 6회 다운로드 | DATE : 2022-05-30 15:05:53