Material nonlinear finite element analysis and optimal design of reinforced concrete structures = 철근콘크리트 구조물의 비선형 해석 및 최적설계

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In this dissertation, effective methods for structural analysis and design are developed. For the nonlinear analysis, the effects of finite element mesh sizes on the analysis of the behavior of the structure, which is the most significant among the effects such as load step, and integration orders, etc., is investigated and a new criterion to reduce the numerical error associated with the mesh sizes is developed. This newly developed criterion is based on the fracture energy concept and can be easily implemented into a numerical analysis procedure. In particular, this approach can be used effectively with relatively large finite element mesh sizes used in most practical applications. The validity of proposed criterion is tested by comparing the analytical results from this study with those of experimental studies and other previous numerical studies. For structural optimization, a simplified, yet effective, algorithm is presented. Instead of utilizing the more sophisticated optimization model that requires many variables and complicated descriptive functions, the proposed algorithm uses an effective direct search method. After constructing the database of predetermined R/C sections which are arranged in the order of increasing resistant capacities, the relationship between the section identification numbers and the resistant capacities of sections is established by regression and used to obtain an initial solution(section) which satisfies the imposed design constraints. Assuming that there exists an optimum section near the one initially selected by continuous optimization, a direct search is conducted to find the discrete optimum solution. The optimization of the entire structure is accomplished through the individual member optimization.
Advisors
Choi, Chang-Koon최창근
Description
한국과학기술원 : 토목공학과,
Publisher
한국과학기술원
Issue Date
1990
Identifier
61492/325007 / 000855020
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 토목공학과, 1990.2, [ ix, 156 p. ]

URI
http://hdl.handle.net/10203/30635
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=61492&flag=dissertation
Appears in Collection
CE-Theses_Ph.D.(박사논문)
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