Title:
Functional Performance of Bridge Girders Strengthened with Post-Tensioned Near-Surface-Mounted Carbon Fiber- Reinforced Polymer
Author(s):
Yail J. Kim, Jae-Yoon Kang, Jong-Sup Park, and Woo-Tai Jung
Publication:
Structural Journal
Volume:
113
Issue:
2
Appears on pages(s):
239-250
Keywords:
carbon fiber-reinforced polymer (CFRP); complexity; nearsurface- mounted (NSM); post-tensioning; reliability; strengthening
DOI:
10.14359/51687801
Date:
3/1/2016
Abstract:
This paper presents the performance reliability and functional complexity of prestressed concrete girders strengthened with an emerging rehabilitation method using post-tensioned near-surfacemounted (NSM) carbon fiber-reinforced polymer (CFRP) strips. The influence of corrosion damage on the flexural capacity of the girders is theoretically predicted based on a stochastic approach, including an emphasis on chloride diffusion and concentration. A total of 1,650,000 cases having various CFRP-post-tensioning levels from 0 to 60% of the strength of CFRP are simulated, and corresponding results are analyzed. Predictive results indicate that the effect of corrosion becomes distressful with a time gap of 13.7 years after the initiation of corrosion from a practical point of view. The efficacy of the post-tensioned NSM CFRP in terms of preserving flexural strength and reducing vulnerability to deterioration is more pronounced with an increase in service year, based on a robust stress redistribution mechanism. Functional complexity is also reduced after strengthening, which can better achieve the given functional requirements of constructed bridge girders. Performance-based design factors are proposed, depending on service categories that are a function of traffic volume.
Related References:
1. AASHTO, “AASHTO LRFD Bridge Design Specifications: Seventh Edition,” American Association of State Highway and Transportation Officials, Washington, DC, 2014.
2. Ahmad, S., “Reinforcement Corrosion in Concrete Structures, Its Monitoring and Service Life Prediction—A Review,” Cement and Concrete Composites, V. 25, No. 4-5, 2003, pp. 459-471. doi: 10.1016/S0958-9465(02)00086-0
3. Teng, J. G.; Chen, J. F.; Smith, S. T.; and Lam, L., FRP Strengthened RC Structures, John Wiley & Sons, Inc., West Sussex, UK, 2002, 266 pp.
4. Bank, L. C., Composites for Construction: Structural Design with FRP Materials, John Wiley & Sons, Inc., Hoboken, NJ, 2006, 560 pp.
5. De Lorenzis, L., and Teng, J. G., “Near-Surface Mounted FRP Reinforcement: An Emerging Technique for Strengthening Structures,” Composites. Part B, Engineering, V. 38, No. 2, 2007, pp. 119-143. doi: 10.1016/j.compositesb.2006.08.003
6. Taljsten, B., and Nordin, H., “Concrete Beams Strengthened with External Prestressing Using External Tendons and Near-Surface-Mounted Reinforcement,” Case Histories and Use of FRP for Prestressing Applications, SP-245, R. El-Hacha and S. H. Rizkalla, eds., American Concrete Institute, Farmington Hills, MI, 2007, pp. 143-164.
7. El-Hacha, R., and Gaafar, M., “Flexural Strengthening of Reinforced Concrete Beams Using Prestressed Near-Surface-Mounted CFRP Bars,” PCI Journal, V. 56, No. 4, 2011, pp. 134-151. doi: 10.15554/pcij.09012011.134.151
8. Ye, Y.; Guo, Z. X.; and Chai, Z. L., “Flexural Behavior of Stone Slabs Reinforced with Prestressed NSM CFRP Bars,” Journal of Composites for Construction, ASCE, V. 18, No. 4, 2014, p. 04014004 doi: 10.1061/(ASCE)CC.1943-5614.0000458
9. El-Hacha, R., and Soudki, K., “Prestressed Near-Surface Mounted Fibre Reinforced Polymer Reinforcement for Concrete Structures—A Review,” Canadian Journal of Civil Engineering, V. 40, No. 11, 2013, pp. 1127-1139. doi: 10.1139/cjce-2013-0063
10. ASCE, “Report Card for America’s Infrastructure,” American Society of Civil Engineers, Reston, VA, 2013, 74 pp.
11. Kim, Y. J.; Hyun, S. W.; Kang, J.-Y.; and Park, J.-S., “Anchorage Configuration for Post-Tensioned NSM CFRP Upgrading Constructed Bridge Girders,” Engineering Structures, V. 79, Nov. 2014, pp. 256-266. doi: 10.1016/j.engstruct.2014.08.022
12. KHC, “Standard Drawing of Highway Bridges,” Korea Highway Corporation, Seongnam-si, Gyeonggi-do, Korea, 2001.
13. Jung, W.-T.; Park, Y.-H.; Park, J.-S.; Kang, J.-Y.; and You, Y.-J., “Experimental Investigation on Flexural Behavior of RC Beams Strengthened by NSM CFRP Reinforcements,” 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures, SP-230, C. K. Shield, J. P. Busel, S. L. Walkup, and D. D. Gremel, eds., American Concrete Institute, Farmington Hills, MI, 2005, pp. 795-806.
14. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary,” American Concrete Institute, Farmington Hills, MI, 2011, 503 pp.
15. Wu, Z.; Iwashita, K.; and Sun, X., “Structural Performance of RC Beams Strengthened with Prestressed Near-Surface-Mounted CFRP Tendons,” Case Histories and Use of FRP for Prestressing Applications, SP-245, R. El-Hacha and S. H. Rizkalla, eds., American Concrete Institute, Farmington Hills, MI, 2007, pp. 165-178.
16. Badawi, M., and Soudki, K., “Flexural Strengthening of RC Beams with Prestressed NSM CFRP Rods—Experimental and Analytical Investigation,” Construction and Building Materials, V. 23, No. 10, 2009, pp. 3292-3300. doi: 10.1016/j.conbuildmat.2009.03.005
17. Hajihashemi, A.; Mostofinejad, D.; and Azhari, M., “Investigation of RC Beams Strengthened with Prestressed NSM CFRP Laminates,” Journal of Composites for Construction, ASCE, V. 15, No. 6, 2011, pp. 887-895. doi: 10.1061/(ASCE)CC.1943-5614.0000225
18. Dyer, T., Concrete Durability, CRC Press, Boca Raton, FL, 2014, 447 pp.
19. Thoft-Christensen, P.; Jensen, F. M.; Middleton, C. R.; and Blackmore, A., “Assessment of the Reliability of Concrete Slab Bridges,” 7th IFIP WG 7.5 Working Conference, Boulder, CO, 1996, pp. 1-8.
20. Stewart, M. G., and Rosowsky, D. V., “Time-Dependent Reliability of Deteriorating Reinforced Concrete Bridge Decks,” Structural Safety, V. 20, No. 1, 1998, pp. 91-109. doi: 10.1016/S0167-4730(97)00021-0
21. Ahmad, Z., Principles of Corrosion Engineering and Corrosion Control, Butterworth-Heinemann, Oxford, UK, 2006, 450 pp.
22. Firodiya, P. K.; Sengupta, A. K.; and Pillai, R., “Evaluation of Corrosion Rates of Reinforcing Bars for Probabilistic Assessment of Exiting Road Bridge Girders,” Journal of Performance of Constructed Facilities, 2014, V. 29, No. 3, June 2015.
23. Vu, K. A. T., and Stewart, M. G., “Structural Reliability of Concrete Bridges Including Improved Chloride-Induced Corrosion Models,” Structural Safety, V. 22, No. 4, 2000, pp. 313-333. doi: 10.1016/S0167-4730(00)00018-7
24. Darmawan, M. S., and Stewart, M. G., “Spatial Time-Dependent Reliability Analysis of Corroding Pretensioned Prestressed Concrete Bridge Girders,” Structural Safety, V. 29, No. 1, 2007, pp. 16-31. doi: 10.1016/j.strusafe.2005.11.002
25. Youakim, S. A., and Karbhari, V. M., “An Approach to Determine Long-Term Behavior of Concrete Members Prestressed with FRP Tendons,” Construction and Building Materials, V. 21, No. 5, 2007, pp. 1052-1060. doi: 10.1016/j.conbuildmat.2006.02.006
26. Enright, M. P., and Frangopol, D. M., “Probabilistic Analysis of Resistance Degradation of Reinforced Concrete Bridge Beams under Corrosion,” Engineering Structures, V. 20, No. 11, 1998, pp. 960-971. doi: 10.1016/S0141-0296(97)00190-9
27. Val, D. V., and Stewart, M. G., “Life-Cycle Cost Analysis of Reinforced Concrete Structures in Marine Environment,” Structural Safety, V. 25, No. 4, 2003, pp. 343-362. doi: 10.1016/S0167-4730(03)00014-6
28. Smith, J. L., and Virmani, Y. P., “Performance of Epoxy-Coated Rebars in Bridge Decks,” Public Roads, V. 60, No. 2, 1996, pp. 6-12.
29. Washa, G. W., and Wendt, K. F., “Fifty-Year Properties of Concrete,” ACI Journal Proceedings, V. 72, No. 1, Jan. 1975, pp. 29-38.
30. Bhargava, K.; Ghosh, A. K.; Mori, Y.; and Ramanujam, S., “Modeling of Time to Corrosion-Induced Cover Cracking in Reinforced Concrete Structures,” Cement and Concrete Research, V. 35, No. 11, 2005, pp. 2203-2218. doi: 10.1016/j.cemconres.2005.06.007
31. Nowak, A. S., “Calibration of LRFD Bridge Design Code,” NCHRP 12-33, Transportation Research Board, Washington, DC, 1993, 222 pp.
32. Kwon, O.-S.; Kim, E.; Orton, S.; Salim, H.; and Hazlett, T., “Calibration of the Live Load Factor in LRFD Design Guidelines,” Final Report OR11-003, Missouri Department of Transportation, Jefferson City, MO, 2011, 104 pp.
33. Suh, N. P., Complexity: Theory and Applications, Oxford University Press, New York, 2005, 300 pp.
34. Barker, R. M., and Puckett, J. A., Design of Highway Bridges Based on AASHTO LRFD Bridge Design Specifications, John Wiley & Sons, Inc., New York, 1997, 1192 pp.
35. AASHTO, “Guide Specifications for Strength Evaluation of Existing Steel and Concrete Bridges,” American Association of State Highway and Transportation Officials, Washington, DC, 1989, 30 pp.
36. Mirza, S. A.; Kikuchi, D. K.; and MacGregor, J. G., “Flexural Strength Reduction Factor for Bonded Prestressed Concrete Beams,” ACI Journal Proceedings, V. 77, No. 4, Apr. 1980, pp. 237-246.
37. JCSS, “Probabilistic Model Code,” Joint Committee on Structural Safety, Copenhagen, Denmark, 2014, 7 pp.
38. Nowak, A. S., and Collins, K. R., Reliability of Structures, second edition, CRC Press, Boca Raton, FL, 2013, 407 pp.
39. Fox, M.; Trost, S.; and Hellman, S., “Evaluation of Novel Methods to Measure Water-to-Cement Ratio of Fresh Concrete,” Final Report for Highway IDEA Project 105, Transportation Research Board, Washington, DC, 2007, 46 pp.
40. Atadero, R. A., and Karbhari, V. M., “Calibration of Resistance Factors for Reliability Based Design of Externally-Bonded FRP Composites,” Composites. Part B, Engineering, V. 39, No. 4, 2008, pp. 665-679. doi: 10.1016/j.compositesb.2007.06.004
41. Lekou, D. J., and Philippidis, T. P., “Probabilistic Strength Assessment of FRP Laminates: Verification and Comparison,” Project UpWind, Contract No: 019945 (SES6), http://www.upwind.eu/Publicatips (last accessed Aug. 6, 2014)
42. Ford, J., “Effects of Freeze/Thaw Cycling on the Fatigue Behavior of Prestressed Concrete Beams Strengthened with Prestressed CFRP Sheets,” MSc (Eng.) thesis, Queen’s University, Kingston, ON, Canada, 2004, 162 pp.
43. Li, C. Q., and Melchers, R. E., “Time-Dependent Risk Assessment of Structural Deterioration Caused by Reinforcement Corrosion,” ACI Structural Journal, V. 102, No. 5, Sept.-Oct. 2005, pp. 754-762.