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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.11 No.2
- 발행연도
- 2017.6
- 수록면
- 327 - 341 (15page)
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초록· 키워드
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Openings in slabs are usually required for many different applications such as aeriation ducts and air conditioning. Opening in concrete slabs due to cutouts significantly decrease the member stiffness. There are different techniques to strengthen slabs with opening cutouts. This study presents experimental and numerical investigations on the use of Carbon Fiber Reinforced Polymers (CFRP) as strengthening material to strengthen and restore the load carrying capacity of R.C. slabs after having cutout in the hogging moment region. The experimental program consisted of testing five (oneway spanning R.C. flat slabs) with overhang. All slabs were prismatic, rectangular in cross-section and nominally 2000 mm long, 1000 mm width, and 100 mm thickness with a clear span (distance between supports) of 1200 mm and the overhang length is 700 mm. All slabs were loaded up to 30 kN (45% of ultimate load for reference slab, before yielding of the longitudinal reinforcement), then the load was kept constant during cutting concrete and steel bars (producing cut out). After that operation, slabs were loaded till failure. An analytical study using finite element analysis (FEA) is performed using the commercial software ANSYS. The FEA has been validated and calibrated using the experimental results. The FE model was found to be in a good agreement with the experimental results. The investigated key parameters were slab aspect ratio for the opening ratios of [1:1, 2:1], CFRP layers and the laminates widths, positions for cutouts and the CFRP configurations around cutouts.
목차
Abstract
1. Introduction
2. Experimental Program
3. Experimental Results and Dissusion
4. Finite Element Analysis
5. Comparison Between FE and Experimental Results
6. Conclusions
References
참고문헌 (14)
참고문헌 신청
ACI 318-14, ‘‘Building Code Requirements for Structural Concrete and Commentary’’, American Concrete Institute, Farmington Hills, Michigan, February, 68 pp.
ANSYS. (2011). Release 14.0 documentation. ANSYS Inc. http://www.ansys.com
Casadei, P., Nanni, A., & Ibell, T. J. (2003). Experiments on two-way RC slabs with openings strengthened with CFRP laminates. In Proceedings of advancing with composites, PLAST 2003. Milan, Italy, Conference 7?9 May, Conference 2003.
Enochsson, O., Lundqvist, J., Taljsten, B., Rusinowski, P., & Olofsson, T. (2007). CFRP strengthened openings in twoway concrete slabs?An experimental and numerical study. Construction and Building Materials, 21(4), 810?826.
Khajehdehia, R., & Panahshahib, N. (2016). Effect of openings on in-plane structural behavior of reinforced concrete floor slabs. Journal of Building Engineering, 7, 1?11
ANSYS. (2011). Release 14.0 documentation. ANSYS Inc. http://www.ansys.com
Casadei, P., Nanni, A., & Ibell, T. J. (2003). Experiments on two-way RC slabs with openings strengthened with CFRP laminates. In Proceedings of advancing with composites, PLAST 2003. Milan, Italy, Conference 7?9 May, Conference 2003.
Enochsson, O., Lundqvist, J., Taljsten, B., Rusinowski, P., & Olofsson, T. (2007). CFRP strengthened openings in twoway concrete slabs?An experimental and numerical study. Construction and Building Materials, 21(4), 810?826.
Khajehdehia, R., & Panahshahib, N. (2016). Effect of openings on in-plane structural behavior of reinforced concrete floor slabs. Journal of Building Engineering, 7, 1?11
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