지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 이지호
- 발행연도
- 2016
- 저작권
- 동국대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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Intake towers are infrastructures which supply water and are directly connected to people''s lives. Therefore, when they are damaged by an earthquake, severe social and economic loss can be caused, which results in the national infrastructural system, malfunction.
Because intake towers are submerged under water, water pressure works as an important load. Accordingly, hydrodynamic pressure computation is very important under an earthquake event. However, existing methods of hydrodynamic pressure computation used in Korea do not reflect the three-dimensional shape features properly, which causes inappropriate earthquake analysis results for intake towers.
In this thesis, following studies are conducted to solve this problem:
(1) Analyze the features of hydrodynamic pressure distribution of intake towers according to the intake tower''s geometrics through CASI method,
(2) Propose reasonable added mass in the intake tower''s three-dimensional numerical model,
(3) Evaluate the intake tower''s seismic stability by performing time-history seismic analysis considering three-dimensional hydrodynamic pressure distribution.
From the studies, it is verified that the features of threedimensional hydrodynamic pressure distribution are important, and it is proposed an application method to represent the intake tower''s added mass reflecting three-dimensional hydrodynamic pressure distribution. Numerical analysis of intake towers using the suggested added mass method shows that CASI method and the proposed method agree well in stress distribution. Moreover, computing time becomes greatly shortened. In conclusion, the proposed method can be considered to be helpful in predicting the intake tower''s behavior under an earthquake.
Because intake towers are submerged under water, water pressure works as an important load. Accordingly, hydrodynamic pressure computation is very important under an earthquake event. However, existing methods of hydrodynamic pressure computation used in Korea do not reflect the three-dimensional shape features properly, which causes inappropriate earthquake analysis results for intake towers.
In this thesis, following studies are conducted to solve this problem:
(1) Analyze the features of hydrodynamic pressure distribution of intake towers according to the intake tower''s geometrics through CASI method,
(2) Propose reasonable added mass in the intake tower''s three-dimensional numerical model,
(3) Evaluate the intake tower''s seismic stability by performing time-history seismic analysis considering three-dimensional hydrodynamic pressure distribution.
From the studies, it is verified that the features of threedimensional hydrodynamic pressure distribution are important, and it is proposed an application method to represent the intake tower''s added mass reflecting three-dimensional hydrodynamic pressure distribution. Numerical analysis of intake towers using the suggested added mass method shows that CASI method and the proposed method agree well in stress distribution. Moreover, computing time becomes greatly shortened. In conclusion, the proposed method can be considered to be helpful in predicting the intake tower''s behavior under an earthquake.
목차
제 1 장 서 론 11.1 연구배경 11.2 연구목적 및 방법 2제 2 장 구조물-유체 상호작용에 따른 동수압 산정 42.1 Westergaard 부가질량식 42.2 Chopra 부가질량식 72.3 CASI법 112.4 부가질량식과 CASI법의 비교 분석 122.4.1 Westergaard 부가질량식과 CASI법의 동수압 비교 142.4.2 Chopra 부가질량식과 CASI법의 동수압 비교 19제 3 장 취수탑에 작용하는 동수압 분포 산정 303.1 외부 동수압 분포식 산정 303.2 외부 동수압 분포식 산정 결과 363.3 외부 동수압 분포식 수치해석 적용 검증 463.3.1 경계조건 및 재료 물성치 463.3.2 3차원 수치모형 473.3.3 수치해석 결과 및 고찰 49제 4 장 취수탑 구조물에 대한 동적 내진해석 534.1 취수탑 3차원 수치모형 534.1.1 취수탑 제원 및 수치모형 모델링 534.1.2 취수탑의 주요 물성치 564.1.3 취수탑 주요하중 산정 584.2 취수탑의 동적 안정성 평가기준 644.2.1 전도에 대한 동적 안정성 644.2.2 활동에 대한 동적 안정성 654.3 취수탑의 동적 안정성 평가 결과 및 고찰 664.3.1 변위응답 664.3.2 발생응력 검토 684.3.3 전도에 대한 동적 안정성 평가 704.3.4 활동에 대한 동적 안정성 평가 72제 5 장 결 론 74참고문헌 76Abstract 78
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