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http://dx.doi.org/10.4334/JKCI.2012.24.3.293

Evaluating Impact Resistance of Externally Strengthened Steel Fiber Reinforced Concrete Slab with Fiber Reinforced Polymers  

Yoo, Doo-Yeol (School of Civil, Environmental and Architectural Engineering, Korea University)
Min, Kyung-Hwan (School of Civil, Environmental and Architectural Engineering, Korea University)
Lee, Jin-Young (School of Civil, Environmental and Architectural Engineering, Korea University)
Yoon, Young-Soo (School of Civil, Environmental and Architectural Engineering, Korea University)
Publication Information
Journal of the Korea Concrete Institute / v.24, no.3, 2012 , pp. 293-303 More about this Journal
Abstract
Recently, as construction technology improved, concrete structures not only became larger, taller and longer but were able to perform various functions. However, if extreme loads such as impact, blast, and fire are applied to those structures, it would cause severe property damages and human casualties. Especially, the structural responses from extreme loading are totally different than that from quasi-static loading, because large pressure is applied to structures from mass acceleration effect of impact and blast loads. Therefore, the strain rate effect and damage levels should be considered when concrete structure is designed. In this study, the low velocity impact loading test of steel fiber reinforced concrete (SFRC) slabs including 0%~1.5% (by volume) of steel fibers, and strengthened with two types of FRP sheets was performed to develop an impact resistant structural member. From the test results, the maximum impact load, dissipated energy and the number of drop to failure increased, whereas the maximum displacement and support rotation were reduced by strengthening SFRC slab with FRP sheets in tensile zone. The test results showed that the impact resistance of concrete slab can be substantially improved by externally strengthening using FRP sheets. This result can be used in designing of primary facilities exposed to such extreme loads. The dynamic responses of SFRC slab strengthened with FRP sheets under low velocity impact load were also analyzed using LS-DYNA, a finite element analysis program with an explicit time integration scheme. The comparison of test and analytical results showed that they were within 5% of error with respect to maximum displacements.
Keywords
low velocity impact load; strain rate; steel fiber reinforced concrete; fiber reinforced polymer; LS-DYNA;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 Zhou, X. Q., Kuznetsov, V. A, Hao, H., and Waschl, J., "Numerical Prediction of Concrete Slab Response to Blast Loading," International Journal of Impact Engineering, Vol. 35, No. 10, 2008, pp. 1186-1200.   DOI   ScienceOn
2 이경구, "폭발하중을 받는 강재압축재의 잔여저항성능 평가," 대한건축학회지, 26권,10호, 2010, pp. 37-44.
3 이진영, 김미혜, 민경환, 윤영수, "저속 충격하중에서의 FRP Sheet 및 강섬유 보강 콘크리트의 거동 해석," 구조 물진단학회지, 15권, 4호, 2011, pp. 155-164.
4 Teng, T. L., Chu, Y. A., Chang, F. A., Shen, B. C., and Cheng, D. S., "Development and Validation of Numerical Model of Steel Fiber Reinforced Concrete for High-Velocity Impact," Computational Materials Science, Vol. 42, No. 1, 2008, pp. 90-99.   DOI   ScienceOn
5 Wang, Z. L., Konietzky, H., and Huang, R. Y., "Elastic-Plastic- Hydrodynamic Analysis of Crater Blasting in Steel Fiber Reinforced Concrete," Theoretical and Applied Fracture Mechanics, Vol. 52, No. 2, 2009, pp. 111-116.   DOI   ScienceOn
6 Comite Euro-International du Beton (CEB), CEB-FIP Model Code 1990, Redwood Books, Wiltshire, UK, 1993.
7 Wang, S., Zhang, M. H., and Quek, S. T., "Effect of High Strain Rate Loading on Compressive Behavior of Fibre- Reinforced High-Strength Concrete," Magazine of Concrete Research, Vol. 63, No. 11, 2011, pp. 813-827.   DOI
8 Malvar L. J. and Ross C. A., "Review of Strain Rate Effects for Concrete in Tension," ACI Materials Journal, Vol. 95, No. 6, 1998, pp. 735-739.
9 Livermore Software Technology Corporation (LSTC) LSDYNA, Keyword User's Manual Version 971, 2007.
10 Mutalib, A. A. and Hao, H., "Numerical Analysis of FRPComposite- Strengthened RC Panels with Anchorages against Blast Loads," Journal of Performance of Construction Facilities, Vol. 25, No. 5, 2011, pp. 360-372.   DOI   ScienceOn
11 Kim, H. J., Yi, N. H., Kim, S. B., Nam, J. W., Ha, J. H., and Kim, J. H. J., "Debonding Failure Analysis of FRP-Retrofitted Concrete Panel under Blast Loading," Structural Engineering and Mechanics, Vol. 38, No. 4, 2011, pp. 479- 501.   DOI   ScienceOn
12 Yaz c , S., Inan, G., and Tabak, V., "Effect of Aspect Ratio and Volume Fraction of Steel Fiber on the Mechanical Properties of SFRC," Construction and Building Materials, Vol. 21, No. 6, 2007, pp. 1250-1253.   DOI   ScienceOn
13 Buchan, P. A. and Chen, J. F., "Blast Resistance of FRP Composites and Polymer Strengthened Concrete and Masonry Structures - A State-of-the-art Review," Composites Part B, Vol. 38, Nos. 5-6, 2006, pp. 509-522.
14 Min, K. H., Yang, J. M., Yoo, D. Y., and Yoon, Y. S., "Flexural and Punching Performances of FRP and Fiber Reinforced Concrete on Impact Loading," The 5th International Conference on FRP Composites in Civil Engineering, Beijing, China, 2010, pp. 410-414.
15 Silva, P. F. and Lu, B., "Improving the Blast Resistance Capacity of RC Slabs with Innovative Composite Materials," Composites Part B, Vol. 38, Nos. 5-6, 2007, pp. 523-534.   DOI   ScienceOn
16 Mosalam, K. M. and Mosallam, A. S., "Nonlinear Transient Analysis of Reinforced Concrete Slabs Subjected to Blast Loading and Retrofitted with CFRP Composites," Composites Part B, Vol. 32, No. 8, 2001, pp. 623-636.   DOI   ScienceOn
17 ACI Committee 440, "Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures," ACI 440.2R-02, American Concrete Institute, MI, USA, 2002, pp. 1-45.
18 Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L., FRP Strengthened RC Structures, John Wiley & Sons, West Sussex, England, 2002, pp. 31-46.
19 Choi, H. and Krauthammer, T., "Development of Progressive Collapse Analysis Procedure Considering Local Buckling Effects," The 1st International Conference on Design and Analysis of Protective Structures against Impact/Impulsive/ Shock Loads (DAPSIL), Tokyo, Japan, 2003, pp. 481- 488.
20 김호진, 남진원, 김성배, 김장호, 변근주, "폭발하중을 받는 콘크리트 벽체 구조물의 보강 성능에 대한 해석적 분석," 콘크리트학회 논문집, 19권, 2호, 2007, pp. 241-250.   과학기술학회마을   DOI   ScienceOn
21 Nam, J. W., Kim, H. J., Kim, S. B., Yi, N. H., and Kim, J. H. J., "Numerical Evaluation of the Retrofit Effectiveness for GFRP Retrofitted Concrete Slab subjected to Blast Pressure," Composite Structures, Vol. 95, No. 5, 2010, pp. 1212-1222.
22 Krauthammer, T., Modern Protective Structures, CRC Press, 2007.
23 Malvar, L. J., Crawford, J. E., and Morrill, K. B., "Use of Composites to Resist Blast," Journal of Composites for Construction, Vol. 11, No. 6, 2007, pp. 601-610.   DOI   ScienceOn
24 Eren, Ö. and Celik, T., "Effect of Silica Fume and Steel Fibers on Some Properties of High-Strength Concrete," Construction and Building Materials, Vol. 11, Nos. 7-8, 1997, pp. 373-382.   DOI   ScienceOn
25 Kayali, O., "Effect of High Volume Fly Ash on Mechanical Properties of Fiber Reinforced Concrete," Materials and Structures, Vol. 37, No. 5, 2004, pp. 318-327.   DOI   ScienceOn
26 Ati¸s, C. D. and Karaham, O., "Properties of Steel Fiber Reinforced Fly Ash Concrete," Construction and Building Materials, Vol. 23, No. 1, 2009, pp. 392-399.   DOI   ScienceOn
27 Sukontasukkul, P. and Mindess, S., "The Shear Fracture of Concrete under Impact Loading Using End Confined Beams," Materials and Structures, Vol. 36, No. 6, 2003, pp. 372-378.   DOI
28 Fujikake, K., Li, B., and Soeun, S., "Impact Response of Reinforced Concrete Beam and Its Analytical Evaluation," Journal of Structural Engineering, ASCE, Vol. 135, No. 8, 2009, pp. 938-950.   DOI   ScienceOn
29 Ngo, T., Mendis, P., Gupta, A., and Ramsay, J., "Blast Loading and Blast Effects on Structures-An Overview," Electronic Journal of Structural Engineering, Special Issue: Loading on Structures, 2007, pp. 76-91.