DOI QR코드

DOI QR Code

Bond behavior of PP fiber-reinforced cinder concrete after fire exposure

  • Cai, Bin (School of Civil Engineering, Jilin Jianzhu University) ;
  • Wu, Ansheng (School of Civil Engineering, Jilin Jianzhu University) ;
  • Fu, Feng (School of Mathematics, Computer Science and Engineering, City, University of London)
  • 투고 : 2019.06.28
  • 심사 : 2020.08.04
  • 발행 : 2020.08.25

초록

To reduce the damage of concrete in fire, a new type of lightweight cinder aggregate concrete was developed due to the excellent fire resistance of cinder. To further enhance its fire resistance, Polypropylene (PP) Fibers which can enhance the fire resistance of concrete were also used in this type of concrete. However, the bond behavior of this new type of concrete after fire exposure is still unknown. To investigate its bond behavior, 185 specimens were heated up to 22, 200, 400, 600 or 800℃ for 2 h duration respectively, which is followed by subsequent compressive and tensile tests at room temperature. The concrete-rebar bond strength of C30 PP fiber-reinforced cinder concrete was subsequently investigated through pull-out tests after fire exposure. The microstructures of the PP fiber-reinforced cinder concrete and the status of the PP fibre at different temperature were inspected using an advanced scanning electron microscopy, aiming to understand the mechanism of the bonding deterioration under high temperature. The effects of rebar diameter and bond length on the bond strength of PP fiber-reinforced cinder concrete were investigated based on the test results. The bond-slip relation of PP fiber-reinforced cinder concrete after exposure at different temperature was derived based on the test results.

키워드

과제정보

This research was financially supported by the Foundation of China Scholarship Council (no.201805975002) National Natural Science Foundation of China (no. 51678274), Science and Technological Planning Project of Ministry of Housing and Urban-Rural Development of the People's Republic of China (no.2017-K9-047). The authors wish to acknowledge the sponsors. However, any opinions, findings, conclusions and recommendations presented in this paper are those of the authors and do not necessarily reflect the views of the sponsors.

참고문헌

  1. Afaghi-Darabi, A. and Abdollahzadeh, G. (2019), "Effect of cooling rate on the post-fire behavior of CFST column", Comput. Concrete, 23(4), 281-294. https://doi.org/10.12989/cac.2019.23.4.281.
  2. Ahmed, A.E., Al-Shaikh, A.H. and Arafat, T.I. (1992), "Residual compressive and bond strengths of limestone aggregate concrete subjected to elevated temperatures", Mag. Concrete Res., 44(159), 117-125. https://doi.org/10.1680/macr.1992.44.159.117.
  3. Arel, H.S. and Yazici, S. (2014), "Effect of different parameters on concrete-bar bond under high temperature", ACI Mater. J., 111(6), 633-639.
  4. Bidgoli, M.R. and Saeidifar, M. (2017), "Time-dependent buckling analysis of $SiO_{2}$ nanoparticles reinforced concrete columns exposed to fire", Comput. Concrete, 20(2), 119-127. https://doi.org/10.12989/cac.2017.20.2.119.
  5. Chiang, C.H., Tsai, C.L. and Kan, Y.C. (2000), "Acoustic inspection of bond strength of steel-reinforced mortar sfter exposure to elevated temperatures", Ultrasonic., 38(1-8), 534-536. https://doi.org/10.1016/S0041-624X(99)00088-8.
  6. Deng, X.F., Liang, S.L., Fu, F. and Qian, K. (2020), "Effects of high-strength concrete on progressive collapse resistance of reinforced concrete frame", J. Struct. Eng., 146(6), 4020078-4020078. https://doi.org/10.1016/S0041-624X(99)00088-8.
  7. Diederichs, U. and Schneider, U. (1981), "Bond strength at high temperatures", Mag. Concrete Res., 33(115), 75-84. https://doi.org/10.1680/macr.1981.33.115.75.
  8. Ding, Y., Ning, X., Zhang, Y., Pacheco-Torgal, F. and Aguiar, J.B. (2014), "Fibres for enhancing of the bond capacity between GFRP rebar and concrete", Constr. Build. Mater., 51, 303-312. https://doi.org/10.1016/j.conbuildmat.2013.10.089.
  9. EI-Hawary, M.M. and Hamoush, S.A. (1996), "Bond shear modulus of reinforced concrete at high temperatures", Eng. Fract. Mech., 55(6), 991-999. https://doi.org/10.1016/S0013-7944(96)00049-5.
  10. El-Hawary, M.M., Ragab, A.M., Abd El-Azim, A. and Elibiari, S. (1996), "Effect of fire on flexural behaviour of RC beams", Constr. Build. Mater., 10(2), 147-150. https://doi.org/10.1016/0950-0618(95)00041-0.
  11. El-Hawary, M.M., Ragab, A.M., El-Azim, A.A. and Elibiari, S. (1997), "Effect of fire on shear behavior of RC beams", Comput. Struct., 65(2), 281-287. https://doi.org/10.1016/S0045-7949(95)00356-8
  12. Fan, X. (2015), "Preparation of lightweight aggregate concrete composite insulation of external panel and research of performance", Dissertation, Jilin Jianzhu University.
  13. Fu, F. (2015), Advanced Modeling Techniques in Structural Design, John Wiley & Sons, Ltd..
  14. Fu, F. (2016a), "3D finite element analysis of the whole-building behavior of tall building in fire", Adv. Comput. Des., 1(4), 329-344. https://doi.org/10.12989/acd.2016.1.4.329.
  15. Fu, F. (2016b), Structural Analysis and Design to Prevent Disproportionate Collapse, CRC Press.
  16. Fu, F. (2018), Design and Analysis of Tall and Complex Structures, Elsevier.
  17. Fu, F., Lam, D. and Ye, J. (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.
  18. Fu, F., Lam, D. and Ye, J. (2010), "Moment resistance and rotation capacity of semi-rigid composite connections with precast hollowcore slabs", J. Constr. Steel Res., 66(3), 452-461. https://doi.org/10.1016/j.jcsr.2009.10.016.
  19. Fu, Y.F., Wong, Y.L., Tang, C.A. and Poon, C.S. (2004), "Thermal induced stress and associated cracking in cement-based composite at elevated temperatures-Part I: Thermal cracking around single inclusion", Cement Concrete Compos., 26(2), 99-111. https://doi.org/10.1016/S0958-9465(03)00086-6.
  20. Ganesan, N., Indira, P.V. and Sabeena, M.V. (2014), "Bond stress slip response of bars embedded in hybrid fibre reinforced high performance concrete", Constr. Build. Mater., 50, 108-115. https://doi.org/10.1016/j.conbuildmat.2013.09.032.
  21. 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.
  22. GB (2002), GB/T 50081-2002, Standard for Test Method of Mechanical Properties on Ordinary Concrete, GB, China, Beijing.
  23. GB (2007), GB1499.2-2007, Steel for the Reinforcement of Concrete, Part 2: Hot Rolled Ribbed Bars, GB, China, Beijing.
  24. GB (2010), GB 50010-2010, Code for design of concrete structures. GB, China, Beijing.
  25. Gulsan, M.E., Abdulhaleem, K.N., Kurtoglu, A.E. and Cevik, A. (2018), "Size effect on strength of Fiber-Reinforced Self-Compacting Concrete (SCC) after exposure to high temperatures", Comput. Concrete, 21(6), 681-695. https://doi.org/10.12989/cac.2018.21.6.681.
  26. Guo, L., Liu, Y., Fu, F. and Huang, H. (2019), "Behavior of axially loaded circular stainless steel tube confined concrete stub columns", Thin Wall. Struct., 139, 66-76. https://doi.org/10.1016/j.tws.2019.02.014.
  27. Haddad, R.H., Al-Saleh, R.J. and Al-Akhras, N.M. (2008), "Effect of elevated temperature on bond between steel reinforcement and fiber reinforced concrete", Fire Saf. J., 43(5), 334-343. https://doi.org/10.1016/j.firesaf.2007.11.002.
  28. Hertz, K. (1982), "The anchorage capacity of reinforcing bars at normal and high temperatures", Mag. Concrete Res., 34(121), 213-220. https://doi.org/10.1680/macr.1982.34.121.213.
  29. Huang, L., Chi, Y., Xu, L., Chen, P. and Zhang, A. (2016), "Local bond performance of rebar embedded in steel-polypropylene hybrid fiber reinforced concrete under monotonic and cyclic loading", Constr. Build. Mater., 103, 77-92. https://doi.org/10.1016/j.conbuildmat.2015.11.040.
  30. Ibrahimbegovic, A., Boulkertous, A., Davenne, L., Muhasilovic, M. and Pokrklic, A. (2010), "On modeling of fire resistance tests on concrete and reinforced-concrete structures", Comput. Concrete, 7(4), 285-301. https://doi.org/10.12989/cac.2010.7.4.285.
  31. Jones, M.R. and McCarthy, A. (2005), "Preliminary views on the potential of foamed concrete as a structural material", Mag. Concrete Res., 57(1), 21-31. https://doi.org/10.1680/macr.2005.57.1.21.
  32. Junli, L., Yuli, D. and Zhinian, Y. (2012), "Experimental study on the deformation of a two-span steel beam in a structural system subjected to fire", Eng. Mech., 29(3), 110-114. (in Chinese)
  33. Kang, H., Cheon, N.R., Lee, D.H., Lee, J., Kim, K.S. and Kim, H.Y. (2017), "P-M interaction curve for reinforced concrete columns exposed to elevated temperature", Comput. Concrete, 19(5), 537-544. https://doi.org/10.12989/cac.2017.19.5.537.
  34. Kodur, V.K.R., Cheng, F.P., Wang, T.C. and Sultan, M.A. (2003), "Effect of strength and fiber reinforcement on the fire resistance of high strength concrete columns", J. Struct. Eng., 129(2), 1-22. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:2(253).
  35. Kodur, V.K.R., Wang, T.C. and Cheng, F.P. (2004), "Predicting the fire resistance behavior of high strength concrete columns", Cement Concrete Compos., 26(2), 141-53. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:2(253).
  36. Li, W.S. (2018), "Study on the impact of the aggregate system on natural volcanic lightweight aggregate concrete performance", Build. Sci., 34(3), 76-81.
  37. Lie, T.T. (1994), "Fire resistance of circular steel columns filled with bar-reinforced concrete", J. Struct. Eng., 120(5), 1489-1509. https://doi.org/10.1061/(ASCE)0733-9445(1994)120:5(1489).
  38. Liu, D., Wang, F., Fu, F. and Wang, H. (2017), "Experimental research on the failure mechanism of foam concrete with C-Channel embedment", Comput. Concrete, 20(3), 263-273. https://doi.org/10.12989/cac.2017.20.3.263.
  39. Ma, G., Huang, Y., Aslani, F. and Kim, T. (2019), "Tensile and bonding behaviours of hybridized BFRP-steel bars as concrete reinforcement", Constr. Build. Mater., 201, 62-70. https://doi.org/10.1016/j.conbuildmat.2018.12.196.
  40. Morley, P.D. and Royles, R. (1983), "Response of the bond in reinforced concrete to high temperatures", Mag. Concrete Res., 35(123), 67-74. https://doi.org/10.1016/j.conbuildmat.2018.12.196.
  41. Pineaud, A., Pimienta, P., Remond, S. and Carre, H. (2016), "Mechanical properties of high performance self-compacting concretes at room and high temperature", Constr. Build. Mater., 112, 747-755. https://doi.org/10.1016/j.conbuildmat.2016.02.132.
  42. Pothisiri, T. and Panedpojaman, P. (2010), "Modeling of bonding between steel rebar and concrete at elevated temperatures", Constr. Build. Mater., 27, 130-140. https://doi.org/10.1016/j.conbuildmat.2011.08.014.
  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., 2020, 110115. https://doi.org/10.1016/j.engstruct.2019.110115.
  44. Ramamurthy, K. (2009), "A classification of studies on properties of foam concrete", Cement Concrete Compos., 31, 388-396. https://doi.org/10.1016/j.cemconcomp.2009.04.006.
  45. Royles, R. and Morley, P.D. (1983), "Further responses of the bond in reinforced concrete to high temperatures", Mag. Concrete Res., 35(124), 157-163. https://doi.org/10.1680/macr.1983.35.124.157.
  46. Royles, R. and Morley, P.D. (1985), "Further response of the bond in reinforced concrete to high temperatures", Mag. Concrete Res., 35(124), 157-163. https://doi.org/10.1680/macr.1983.35.124.157
  47. Sadaghian, H. and Farzam, M. (2019), "Numerical investigation on punching shear of RC slabs exposed to fire", Comput. Concrete, 23(3), 217-233. https://doi.org/10.12989/cac.2019.23.3.217.
  48. Shen, R., Feng, L. and Rong, K. (1991), "Evaluation of mechanics performance of steel bars high temperature", Build. Sci. Res. Sichuan, 2, 5.
  49. Tang, C.W. (2017), "Strength degeneracy of LWAC and flexural behavior of LWAC members after fire", Comput. Concrete, 20(2), 177-184. http://dx.doi.org/10.12989/cac.2017.20.2.177.
  50. Thomas, M.D.A. (2003), "Chloride diffusion in high-performance lightweight aggregate concrete", ACI Spec. Pub., 234, 797-812.
  51. Vakhshouri, B. and Nejadi, S. (2017), "Compressive strength and mixture proportions of self-compacting light weight concrete", Comput. Concrete, 19(5), 555-566. https://doi.org/10.12989/cac.2017.19.5.555.
  52. Varona, F.B., Baeza, F.J., Bru, D. and Ivorra, S. (2018), "Evolution of the bond strength between reinforcing steel and fibre reinforced concrete after high temperature exposure", Constr. Build. Mater., 176, 359-370. https://doi.org/10.1016/j.conbuildmat.2018.05.065.
  53. Wang, J.Y., Chia, K.S., Liew, J.Y.R. and Zhang, M.H. (2013), "Flexural performance of fiber-reinforced ultra lightweight cement composites with low fiber content", Cement Concrete Compos., 43, 39-47. https://doi.org/10.1016/j.cemconcomp.2013.06.006.
  54. Wang, Z.F. (2003), "Research on high performance lightweight aggregate concrete (HPLC) and its application", Wuhan University of Technology.
  55. 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.
  56. Wu, B. and Tang, G. (2010), "State-of-the-art of fire-resistance study on concrete structures in recent years", J. Build. Struct., 31(6), 110-121.
  57. Xiao, J. and Falkner, H. (2006), "On residual strength of highperformance concrete with and without polypropylene fibres at elevated temperatures", Fire Saf. J., 41(2), 115-121. https://doi.org/10.1016/j.firesaf.2005.11.004.
  58. Xiao, J., Hou, Y. and Huang, Z. (2014), "Beam test on bond behavior between high-grade rebar and high-strength concrete after elevated temperatures", Fire Saf. J., 69, 23-35. https://doi.org/10.1016/j.firesaf.2014.07.001.
  59. Xiao, J., Li, Z., Xie, Q. and Shen, L. (2016), "Effect of strain rate on compressive behaviour of highstrength concrete after exposure to elevated temperatures", Fire Saf. J., 83, 25-37. https://doi.org/10.1016/j.firesaf.2016.04.006.
  60. Yang, D.L. (2017), "Domestic and overseas research and utilization on lightweight aggregate concrete prepared with scoria", World Build. Mater., 38(2), 26-30.
  61. Yang, H., Lan, W., Qin, Y. and Wang, J. (2016), "Evaluation of bond performance between deformed bars and recycled aggregate concrete after high temperatures exposure", Constr. Build. Mater., 112, 885-891. https://doi.org/10.1016/j.conbuildmat.2016.02.220.
  62. Yang, X., Lu, Z. and Yu, J. (2014), "Simulation of post-fire structural performance of reinforced concrete framesased on the fiber beam mode", Struct. Eng., 30(6), 33.
  63. Yoo, D.Y., Kwon, K.Y., Park, J.J. and Yoon, Y.S. (2015), "Local bond-slip response of gfrp rebar in ultra-high-performance fiber-reinforced concrete", Compos. Struct., 120, 53-64. https://doi.org/10.1016/j.compstruct.2014.09.055.
  64. Zheng, W.Z., Yang, K. and Wang, Y. (2011), "Progress in fire resistance of prestressed concrete structures", J. Build. Struct., 32(12), 52-61.