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Title |
A Method for Separating D-Regions in Concrete Structures Modeled with Plane Solid Elements
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Authors |
박성환(Sung-Hwan Park) ; 김승환(Seung-Hwan Kim) ; 윤영묵(Young-Mook Yun) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.1.003 |
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Keywords |
콘크리트 구조물; 응력교란영역 분리; 스트럿-타이 모델; 하중 및 경계 조건 concrete structure; separation of disturbed region; strut-and-tie model; load and boundary conditions |
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Abstract |
The strut-and-tie model method is a simplified approach for designing disturbed stress regions (D-regions) in concrete structures. It represents complex stress states using struts, ties, and nodes to enable rational structural design. However, the model’s outcomes often depend on the designer’s experience and judgment, leading to variability in model configurations and design processes for independent D-regions. Defining load and boundary conditions for D-regions within complex or geometrically intricate structures remains a significant challenge. This study proposes a method for separating D-regions from a full concrete structure modeled using plane solid finite elements and for determining appropriate load and boundary conditions for the separated D-region’s finite element model. To support the proposed approach, an OpenGL-based pre- and post-processing program incorporating finite element analysis and graphical capabilities was developed. For validation, D-regions were separated from a beam test specimen, and the finite element analysis results of the separated regions were compared with those of the corresponding regions in the original, unseparated structure. The findings confirmed that the proposed method can effectively isolate D-regions and determine rational load and boundary conditions for their plane solid finite element models, demonstrating its practical applicability for strut-and-tie model design of non-independent D-regions.
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