수평 하중을 받는 프레임 구조물에서 CFT 기둥의 소성 설계 접근법의 효율성 분석
Effectiveness of a Plastic Design Approach for CFT Columns in Frame Structures Subjected to Lateral Forces
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초록
본 논문에서는 소성 설계를 기반으로 한 프레임 구조 설계 시, 기둥의 종류에 따른 구조 제작 비용과 거동의 차이를 연구하였다. 축력과 횡력을 모두 받는 구조물에 적합한 기둥 부재를 선택하는 것이 중요하며, 플라스틱 설계 방법을 채택할 경우 기둥의 역할이 더욱 강조된다다. 특히, 횡력은 기둥의 연성을 요구하며, CFT(콘크리트 충전 강관)형 기둥은 RC(철근 콘크리트) 기둥보다 높은 강철 비율로 연성을 확보하게 된다. 이 논문에서는 CFT 기둥이 RC 기둥보다 더 나은 성능을 보이는지 확인하기 위해 다양한 구조 유형에서 기둥을 설계하고 분석하였다. CFT 기둥을 소성 설계에 채택함으로써 얻을 수 있는 이점은 다양한 구조 유형에 따른 하중 유형의 분석을 통해 제시한다.
Abstract
In this study, when designing a frame structure based on plastic design, the differences in structure manufacturing cost and behavior according to the type of column are investigated. It is important to select an appropriate column member for a structure that is subjected to both axial and lateral loads. If the plastic design method is adopted for the efficient design of the structure, the role of the column becomes more emphasized because not only the beam but also the column plays the role of transferring the surplus moment to other members when the beam is subjected to an overload. In particular, the lateral load requires the ductility of the column, and the Concrete filled tube (CFT)-type column member secures the ductility through a higher steel ratio than the Reinforced Concrete (RC) member. Therefore, if the structure is designed by applying plastic design to the structure to which the lateral load is applied, the CFT column member will show better performance than the RC column member. To confirm that the CFT member has better performance than the RC, in this study, the columns are designed and analyzed differently for a symmetric structure with a low floor, an asymmetric structure with a low floor, and a symmetric structure with a high floor. The advantages of adopting CFT column members on frame plastic design will be shown through the differences in the load type and cost of the columns according to the various structure types.
참고문헌 (17)
- "ACI Committee, 3, Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary", American Concrete Institute, ~ (2008)
- Bai, Y., "Cumulative Component Damages on Collapse Capacity of Ductile Steel and CFT Moment Resisting Frames under Over-design Ground Motions", J. Earthq. Eng, 26(6), pp.3012~3033 (2022)
- Comartin, C. D., "A Summary of FEMA 440: Improvement of Nonlinear Static Seismic Analysis Procedures", 13th World Conference on Earthquake Engineering, pp.1476~ (2004)
- Dell’Aglio, G., "Consideration of Second-Order Effects on Plastic Design of Steel Moment Resisting Frames", Bull. Earthq. Eng, 17, pp.3041~3070 (2019)
- Hatzigeorgiou, G. D., "Numerical Model for the Behavior and Capacity of Circular CFT Columns, Part I: Theory", Eng. Struct, 30(6), pp.1573~1578 (2008)
- Hwang, J. Y., "FE Analysis of Circular CFT Columns Considering Bond-Slip Effect : Evaluation of Ultimate Strength", J. Constr. Steel Res, 145, pp.266~276 (2018)
- Kevadkar, M. D., "Lateral Load Analysis of RCC Building", Int. J. Modern Eng. Res. (IJMER), 3(3), pp.1428~1434 (2013)
- Kim, S., "Optimization of an RC Frame Structure based on a Plastic Analysis and Direct Search of a Section Database", J. Build. Eng, 48, pp.103959~ (2022)
- Kim, S., "Numerical Model for the Estimation of Ultimate Load Capacity of CFT Columns Considering Time-Dependent Behavior", J. Comput. Struct. Eng. Inst. Korea, 37(1), pp.25~31 (2024)
- Kwak, H. G., "Optimum Design of Reinforced Concrete Plane Frames based on Predetermined Section Database", Comput. -Aided Des, 40(3), pp.396~408 (2008)
- Kwon, S. H., "Long-Term Behaviour under Axial Service Loads of Circular Columns Made from Concrete Filled Steel Tubes", Mag. Concr. Res, 57(2), pp.87~99 (2005)
- Lee, C., "Flexural Design of Reinforced Concrete Frames by Genetic Algorithm", J. Struct. Eng, 129(6), pp.762~774 (2003)
- Mostoufinezhad, D., "Parametric Study on Moment Redistribution in Continuous RC Beams using Ductility Demand and Ductility Capacity Concept", Iran. J. Sci. & Technol., Trans. B, Eng., 31(B5), pp.459~471 (2007)
- Muir, L., "The AISC 2010 Specification and the 14th Edition Steel Construction Manual", Structures Congress 2011, pp.661~675 (2011)
- Shakir, A., "Evaluation of Ductility and Allowable Moment Redistribution in Reinforced Concrete Structures", Can. J. Civil Eng, 27(6), pp.1286~1299 (2000)
- Skalomenos, K. A., "Experimental behavior of Concrete-Filled Steel Tube Columns using Ultrahigh-Strength Steel", J. Struct. Eng., 142(9), pp.04016057~ (2016)
- Tazarv, M., "Seismic Design of Bridge Columns Incorporating Mechanical Bar Splices in Plastic Hinge Regions", Eng. Struct, 124, pp.507~520 (2016)