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Title |
A Study on Simplified Analysis and Estimation Method for Evaluation of Structural Safety in Modular Underground Arch Structure
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Authors |
권태윤(Tae-Yun Kwon) ; 조광일(Kwang-Il Cho) ; 이원홍(Wong-Hong Lee) ; 안진희(Jin-Hee Ahn) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.3.55 |
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Keywords |
모듈러 지중아치 구조; 유한요소 해석; 간략해석 방법; 프레임 구조해석; 구조 안전성 평가 Modular underground arch structure; FE analysis; Simplified analysis method; Frame structural analysis; Structural safety evaluation |
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Abstract |
A modular underground arch structure using steel and concrete has been proposed as a structure that has a simple construction process and can effectively resist cross-sectional forces generated during construction and use. Structural behavior of modular underground arch was evaluated about span length less than 15m through 3D structural analysis and test. In general, 2D and 3D structural analysis methods may be applied for structural analysis such as underground arch and tunnels. However, if a 2D or 3D structural analysis method is applied to evaluate the structural safety of a modular underground arch structure, it is difficult to model for structural analysis and it may take an excessively long time to interpret. Therefore, it may not be reasonable as a structural analysis method for considering the structural safety and earth pressure in the design process of a modular underground arch structure. In addition, when a modular underground arch structure is configured for span lengths to which the predetermined cross-section is applicable, it may be reasonable to evaluate only the safety of the structure and cross-section according to the cross-section and load conditions. Therefore, in this study, a structural analysis model using frame elements was proposed for efficient structural safety evaluation. In addition, structural analysis results of the 2D structural analysis model and the simplified analysis model using frame elements were compared, and the structural safety of the modular underground arch structure for a span length of 20m was evaluated with a simplified analysis method.
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