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강상판교의 다단계 최적설계

Title
강상판교의 다단계 최적설계
Other Titles
Multi-level Optimization for Orthotropic Steel Deck Bridges
Author
조효남
Keywords
강상판교; 최적화; 다단계 설계; 근사화 기법; orthotropic steel deck bridge; optimization; approximation technique
Issue Date
2001-06
Publisher
한국전산구조공학회
Citation
한국전산구조공학회 논문집, v. 14, no. 2, page. 237-247
Abstract
강상판교는 부재수가 많고 구조적 거동이 복잡하여 재래적인 단일수준 (CSL) 알고리즘을 이용하여 최적화하는 것이 매우 어렵기 때문에 본 연구에서는 강상판교를 효율적으로 최적화하기 위해 다단계 최적설계 (MLDS) 알고리즘이 제안되었다. 강상판교를 주형과 강상판으로 나누기 위해 등위법이 사용되었고, 시스템 최적화를 위하여 설계 변수를 줄이는 분해법이 사용되었다. 효율적인 최적설계를 위해 다단계 최적설계 알고리즘은 제약조건 소거기법(Constraint Deletion)과 응력 재해석 같은 근사화 기법을 도입하였다. 변위해석을 위한 제약조건 소거기법은 교량의 최적화에 효율적인 것으로 검증되었고, 제안된 응력 재해석 기법 또한 설계민감도 해석을 필요로 하지 않으므로 매우 효율적이다. MLDS 알고리즘의 적용성과 강건성은 다양한 수치예제를 사용하여 기존의 단일수준 알고리즘과 비교하였다. A multi-level design synthesis(MLDS) algorithm for efficiently optimizing orthotropic steel deck bridges is proposed in the paper, because it is very difficult to optimize orthotropic steel deck bridges using a conventional single-level(CSL) algorithm since the bridges have a large number of members and show complex structural behaviors. In the proposed MLDS algorithm a coordination method is introduced to divide the bridges into main girders and orthotropic steel decks and decomposition method is also used to reduce the number of design variables of the decks for system level optimization. For efficient optimization of the bridges the MLDS algorithm incorporates the crucial approximation techniques such as constraints deletion and stress reanalysis. The constraint deletion technique for deflection is found to be very useful for the optimization problem of the bridges. The proposed efficient stress reanalysis technique is also found to be very effective for the complex system optimization problem, since it does not require expensive design sensitivity analysis. The applicability and robustness of the MLDS algorithm is demonstrated using various numerical examples and compared with other algorithm presently available.
URI
http://db.koreascholar.com/Article?code=323680https://repository.hanyang.ac.kr/handle/20.500.11754/158342
ISSN
2287-2302; 1229-3059
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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