Advances in concrete construction

  • 제10권4호
  • /
  • Pages.289-299
  • /
  • 2020
  • /
  • 2287-5301(pISSN)
  • /
  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Postfire reliability analysis of axial load bearing capacity of CFRP retrofitted concrete columns

  • Cai, Bin (School of Civil Engineering, Jilin Jianzhu University) ;
  • Hao, Liyan (School of Civil Engineering, Jilin Jianzhu University) ;
  • Fu, Feng (School of Mathematics, Computer Science and Engineering, City, University of London)
  • 투고 : 2019.09.23
  • 심사 : 2020.09.11
  • 발행 : 2020.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

A reliability analysis of the axial compressive load bearing capacity of postfire reinforced concrete (RC) columns strengthened with carbon fiber reinforced polymer (CFRP) sheets was presented. A 3D finite element (FE) model was built for heat transfer analysis using software ABAQUS. Based on the temperature distribution obtained from the FE analysis, the residual axial compressive load bearing capacity of RC columns was worked out using the section method. Formulas for calculating the residual axial compressive load bearing capacity of the columns after fire exposure and the axial compressive load bearing capacity of postfire columns retrofitted with CFRP sheets were developed. Then the Monte Carlo method was used to analyze the reliability of the axial compressive load bearing capacity of the RC columns retrofitted with CFRP sheets using a code developed in MATLAB. The effects of fire exposure time, load ratio, number of CFRP layers, concrete cover thickness, and longitudinal reinforcement ratio on the reliability of the axial compressive load bearing capacity of the columns after fire were investigated. The results show that within 60 minutes of fire exposure time, the reliability index of the RC columns after retrofitting with two layers of CFRPs can meet the requirements of Chinese code GB 50068 (GB 2001) for safety level II. This method is effective and accurate for the reliability analysis of the axial load bearing capacity of postfire reinforced concrete columns retrofitted with CFRP.

키워드

참고문헌

  1. Abdel-Hafez, L.M., Abouelezz, A.E.Y. and Hassan, A.M. (2015), "Behavior of RC columns retrofitted with CFRP exposed to fire under axial load", HBRC J., 11(1), 68-81. https://doi.org/10.1016/j.hbrcj.2014.02.002.
  2. Ada, M., Sevim, B., Yuzer, N. and Ayvaz, Y. (2018), "Assessment of damages on a RC building after a big fire", Adv. Concrete Constr., 6(2), 177-197. http://dx.doi.org/10.12989/acc.2018.6.2.177.
  3. Ahmad, H., Hameed, R., Riaz, M.R. and Gillani, A.A. (2018), "Strengthening of concrete damaged by mechanical loading and elevated temperature", Adv. Concrete Constr., 6(6), 645-658. http://dx.doi.org/10.12989/acc.2018.6.6.645.
  4. Alhatmey, I.A., Ekmekyapar, T. and Alrebeh, S.K. (2018), "Residual strength capacity of fire-exposed circular concrete-filled steel tube stub columns", Adv. Concrete Constr., 6(5), 485-507. http://dx.doi.org/10.12989/acc.2018.6.5.485.
  5. Alsaad, A. and Hassan, G. (2017), "Utilization of CFRP for strengthening RC columns in marine environment", Case Stud. Constr. Mater., 7, 30-35. https://doi.org/10.1016/j.cscm.2017.05.002.
  6. Alsayed, S.H., Almusallam, T.H., Ibrahim, S.M., Al-Hazmi, N.M., Al-Salloum, Y.A. and Abbas, H. (2014), "Experimental and numerical investigation for compression response of CFRP strengthened shape modified wall-like RC column", Constr. Build. Mater., 63, 72-80. https://doi.org/10.1016/j.conbuildmat.2014.04.047.
  7. BSI (2004), Eurocode 2 - Design of Concrete Structures-Part 1-2: General Rules-Structural fire Design, British Standards Institution, London, UK.
  8. BSI (2013), Eurocode 4-Design of Composite Steel and Concrete Structures-Part 1-2: General Rules-Structural Fire Design, British Standards Institution, London, UK.
  9. Cai, B. and Yuan, Y.H. (2016), "Reliability of bending capacity for corroded reinforced concrete beam strengthened with CFRP", Concrete, (10), 148-151.
  10. Cai, B. and Zhao, L.L. (2018), "Research of reliability of bearing capacity for corroded axial-compression reinforced concrete column strengthened with CFRP", Arch. Technol., 49(1), 65-68.
  11. Cai, B., Zhang, B. and Fu, F. (2019), "A new Reliability analysis approach of flexural capacity of post-fire reinforced concrete beams retrofitted with CFRPs", Proceedings of the Institution of Civil Engineers: Structures and Buildings, 1-15. https://doi.org/10.1680/jstbu.19.00037.
  12. Cardoso, J.B., Almeida, J.R.D., Dias, J.M. and Coelho, P.G. (2008), "Structural reliability analysis using Monte Carlo simulation and neural networks", Adv. Eng. Softw., 39(6), 505-513. https://doi.org/10.1016/j.advengsoft.2007.03.015.
  13. Chen, Z.P., Zhou, S.W. and Liang, H.R. (2018), "Shear behavior test and bearing capacity calculation of recycled aggregate concrete beam after high temperature", J. Nat. Disast., 27(5), 140-152. https://doi.org/10.1016/j.conbuildmat.2015.12.103.
  14. Cree, D., Chowdhury, E.U., Green, M.F., Bisby, L.A. and Benichou, N. (2012), "Performance in fire of FRP-strengthened and insulated reinforced concrete columns", Fire Saf. J., 54, 86-95. https://doi.org/10.1016/j.firesaf.2012.08.006.
  15. Danilov, A.I. (2016), "Some aspects of CFRP steel structures reinforcement in civil engineering", Procedia Eng., 153, 124-130. https://doi.org/10.1016/j.proeng.2016.08.091.
  16. Doran, B., Yetilmezsoy, K. and Murtazaoglu, S. (2015), "Application of fuzzy logic approach in predicting the lateral confinement coefficient for RC columns wrapped with CFRP", Eng. Struct., 88, 74-91. https://doi.org/10.1016/j.engstruct.2015.01.039.
  17. El-Fitiany, S.F. and Youssef, M.A. (2017), "Fire performance of reinforced concrete frames using sectional analysis", Eng. Struct., 142, 165-181. https://doi.org/10.1016/j.engstruct.2017.03.065.
  18. Ellingwood, B.R. (2005), "Load combination requirements for fire-resistant structural design", Fire Protect Eng., 15(1), 43-61. https://doi.org/10.1177/1042391505045582.
  19. Feng, X.B. and Yang, H. (2002), "Realization of structural reliability by Monte Carlo method with MATLAB", China Rural Water Hydrop., 8, 50-51.
  20. Fu, F. (2012), "Response of a multi-storey steel composite building with concentric bracing under consecutive column removal scenarios", J. Constr. Steel Res., 70, 115-126. https://doi.org/10.1016/j.jcsr.2011.10.012.
  21. Fu, F. (2015), Advanced Modeling Techniques in Structural Design, John Wiley & Sons, Ltd.
  22. Fu, F. (2016a), Structural Analysis and Design to Prevent Disproportionate Collapse, CRC Press, Boca Raton, FL, USA.
  23. Fu, F. (2016b), "3D finite element analysis of the whole-building behavior of tall building in fire", Adv. Comput. Des., 1(4), 329-344. http://dx.doi.org/10.12989/acd.2016.1.4.329.
  24. Fu, F. (2018), Design and Analysis of Tall and Complex Structures, Elsevier, London, UK.
  25. Fu, F., Lam, D. and Ye, J.Q. (2008), "Modelling semi-rigid composite joints with precast hollowcore slabs in hogging moment region", J. Constr. Steel Res., 64(12), 1408-1419. https://doi.org/10.1016/j.jcsr.2008.01.012.
  26. Fu, F., Lam, D. and Ye, J.Q. (2010), "Moment resistance and rotation capacity of semi-rigid composite connections with precast hollowcore slabs", Steel Constr., 66(3), 452-461. https://doi.org/10.1016/j.jcsr.2009.10.016.
  27. Gao, S., Guo, L., Fu, F. and Zhang, S. (2017), "Capacity of semi-rigid composite joints in accommodating column loss", J. Constr. Steel Res., 139, 288-301. https://doi.org/10.1016/j.jcsr.2017.09.029.
  28. GB (2001), GB 50068-2001: Unified Standard for Reliability Design of Building Structures, China Architecture Industry Press, Beijing, China.
  29. GB (2008), GB 50153-2008: Unified Standards for Reliability Design of Engineering Structures, China Architecture Industry Press, Beijing, China.
  30. GB (2010), GB 50010-2010: Code for Design of Concrete Structures, China Architecture and Building Press, Beijing, China.
  31. GB (2012), GB 50009-2012: Load Code for the Design of Building Structures, China Architecture and Building Press, Beijing, China.
  32. GB (2013), GB 50367-2013: Code for Design of Strengthening Concrete Structure, China Architecture and Building Press, Beijing, China.
  33. Gjorv, O.E. (2013), "Durability design and quality assurance of major concrete infrastructure", Adv. Concrete Constr., 1(1), 45-63. http://dx.doi.org/10.12989/acc.2013.1.1.045.
  34. Gong, J.X. and Wei, W.W. (2007), Design Principle of the Reliability of Engineering Structures, China Machine Press, Beijing, China.
  35. Gong, J.X., Zhao, G.F. and Liu, L. (2000), "Reliability analysis of reinforced concrete axially compressed members after rehabilitation", Build. Struct., 30(3), 29-33.
  36. Guo, Z.H. and Shi, X.D. (2003), Behaviour of Reinforced Concrete at Elevated Temperature and its Calculation, Tsinghua University Press, Beijing, China.
  37. Imran, M., Mahendran, M. and Keerthan, P. (2018), "Heat transfer modelling of CFRP strengthened and insulated steel tubular columns", Constr. Build. Mater., 184, 278-294. https://doi.org/10.1016/j.conbuildmat.2018.06.205.
  38. ISO (International Organization for Standardization) (1999), ISO 834-1: Fire-Resistance Tests-Elements of Building Construction-Part 1: General Requirements, International Organization for Standardization, Geneva, Switzerland.
  39. Kim, J.J., Youm, K.S. and Reda T.M.M. (2014), "Extracting concrete thermal characteristics from temperature time history of RC column exposed to standard fire", Scientif. World J., 2014, 1-10. https://doi.org/10.1155/2014/242806.
  40. Kodur, V.K.R., Raut, N.K., Mao, X.Y. and Khaliq, W. (2013), "Simplified approach for evaluating residual strength of fire-exposed reinforced concrete columns", Mater. Struct., 46(2), 2059-2075. ttps://doi.org/10.1617/s11527-013-0036-2.
  41. Li, J.H., Yu, C.H., Tang, Y.F., Liu, M.Z. and Xiao, H. (2011), "Experimental research on rehabilitation with CFRP sheets for reinforced concrete columns after exposure to fire", J. Arch. Civil Eng., 28(4), 48-54.
  42. Lie, T.T., Rowe, T.J. and Lin, T.D. (1986), "Residual strength of fire-exposed reinforced concrete column", Am. Concrete Inst., 92, 153-174.
  43. Qian, K., Liang, S.L., Xiong, X.Y., Fu, F. and Fang, Q. (2020), "Quasi-static and dynamic behavior of precast concrete frames with high performance dry connections subjected to loss of a penultimate column scenario", Eng. Struct., 205, 110115-110115. https://doi.org/10.1016/j.engstruct.2019.110115.
  44. Sahamitmongkol, R., Choktaweekarn, P., Sancharoen, P. and Tangtermsirikul, S. (2011), "Damage analysis of an RC column subjected to long-term transient elevated temperature", Struct. Infrastr. Eng., 7(12), 921-930. https://doi.org/10.1080/15732470903241873.
  45. Sen, R., Liby, L. and Mullins, G. (2001), "Strengthening steel bridge sections using CFRP laminates", Compos. Part B: Eng., 32(4), 309-322. https://doi.org/10.1016/S1359-8368(01)00006-3.
  46. Shaikh, F.U.A. and Taweel, M. (2015), "Compressive strength and failure behaviour of fibre reinforced concrete at elevated temperatures", Adv. Concrete Constr., 3(4), 283-293. http://dx.doi.org/10.12989/acc.2015.3.4.283.
  47. Shen, R., Feng, L.Y. and Rong, K. (1991), "Assessment on mechanical property of rebar after elevated temperature (fire)", Sichuan Build. Sci., 17(2), 5-9.
  48. Taljsten, B. and Elfgren, L. (2000), "Strengthening concrete beams for shear using CFRP-materials: evaluation of different application methods", Compos. Part B: Eng., 31(2), 87-96. https://doi.org/10.1016/S1359-8368(99)00077-3.
  49. Van Coile, R. and Bisby, L. (2017), "Initial probabilistic studies into a deflection-based design format for concrete floors exposed to fire", Procedia Eng., 210, 488-495. https://doi.org/10.1016/j.proeng.2017.11.105.
  50. Van Coile, R., Annerel, E., Caspeele, R. and Taerwe, L. (2013), "Full-probabilistic analysis of concrete beams during fire", J. Struct. Fire Eng., 4(3), 165-174. https://doi.org/10.1260/2040-2317.4.3.165
  51. Wang, G.Y., Liu, Q., Zhang, D.M. and Zhang, C. (2016), "A finite element model for post-fire seismic performance of steel reinforced concrete columns", Eng. Mech., 33(11), 183-192.
  52. Weng, Y.H., Qian, K., Fu, F. and Fang, Q. (2020), "Numerical investigation on load redistribution capacity of flat slab substructures to resist progressive collapse", J. Build. Eng., 29, 101109. https://doi.org/10.1016/j.jobe.2019.101109.
  53. Winful, D., Cashell, K.A., Afshan, S., Barner, A.M. and Pargeter, R.J. (2018), "Behaviour of high strength steel columns under fire conditions", J. Constr. Steel Res., 150, 392-404. https://doi.org/10.1016/j.jcsr.2018.06.008.
  54. Won, D.H., Park, W.S., Jang, I.S., Han, S.H. and Han, T.H. (2014), "Fire resistance performance of steel composite hollow RC column with inner tube under ISO 834 standard fire", Struct. Concrete, 15(4), 543-555. https://doi.org/10.1002/suco.201300067.
  55. Wu, B. (2014), The Mechanical Properties of Reinforced Concrete Structures after Fire, Science Press, Beijing, China.
  56. Xu, Y.L., Li, G.H. and Fan, C.J. (2014), "The finite element simulation analysis of reinforced concrete beams under high temperature based on ABAQUS", Constr. Des. Project, (6), 1-6.
  57. Xu, Y.Y. and Wang, Q.F. (2010), "Research on residual strength of reinforced concrete columns after exposure to fire", Eng. Mech., 27(2), 84-89.
  58. Yazdani, N., Beneberu, E. and Mohiuddin, A.H. (2018), "CFRP retrofit of concrete circular columns: Evaluation of design guidelines", Compos. Struct., 202, 458-464. https://doi.org/10.1016/j.compstruct.2018.02.066.
  59. Yuan, J. (2017), "Reliability analysis of shear capacity of reinforced concrete beams", J. Build. Struct., 38(4), 109-128. https://doi.org/10.1680/jmacr.19.00367.
  60. Yue, Q.R. (2000), "Present status of research and application of strengthening and repairing technology with carbon fiber reinforced plastics (CFRP) and its outlook in China", Indus. Constr., 30(10), 23-26. https://doi.org/10.3321/j.issn:1000-8993.2000.10.006
  61. Yue, Q.R., Chen, X.B. and Mu, H.Y. (1998), "New technology of carbon fibre reinforced plastics on strengthening & repairing concrete structures", Indus. Constr., 28(11), 1-5.
  62. Zhang, B., Cullen, M. and Kilpatrick, T. (2014), "Fracture toughness of high performance concrete subjected to elevated temperatures Part 1 - The effects of heating temperatures and testing conditions (hot and cold)", Adv. Concrete Constr., 2(2), 145-162. http://dx.doi.org/10.12989/acc.2014.2.2.015.
  63. Zhou, X.H., Tu, X., Chen, A.R. and Wang, Y.Q. (2019), "Numerical simulation approach for structural capacity of corroded reinforced concrete bridge", Adv. Concrete Constr., 7(1), 11-22. http://dx.doi.org/10.12989/acc.2019.7.1.011.