Computers and Concrete

  • 제12권6호
  • /
  • Pages.739-754
  • /
  • 2013
  • /
  • 1598-8198(pISSN)
  • /
  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Effects of cyclic loading on the long-term deflection of prestressed concrete beams

  • Zhang, Lihai (Department of Infrastructure Engineering, The University of Melbourne) ;
  • Mendis, Priyan (Department of Infrastructure Engineering, The University of Melbourne) ;
  • Hon, Wong Chon (Department of Infrastructure Engineering, The University of Melbourne) ;
  • Fragomeni, Sam (Department of Civil Engineering, Victoria University) ;
  • Lam, Nelson (Department of Infrastructure Engineering, The University of Melbourne) ;
  • Song, Yilun (Department of Infrastructure Engineering, The University of Melbourne)
  • 투고 : 2011.11.02
  • 심사 : 2013.07.30
  • 발행 : 2013.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Creep and shrinkage have pronounced effects on the long-term deflection of prestressed concrete members. Under repeated loading, the rate of creep in prestressed concrete members is often accelerated. In this paper, an iterative computational procedure based on the well known Model B3 for creep and shrinkage was developed to predict the time-dependent deflection of partially prestressed concrete members. The developed model was validated using the experimental observed deflection behavior of a simply supported partially prestressed concrete beam under repeated loading. The validated model was then employed to make predictions of the long-term deflection of the prestressed beams under a variety of conditions (e.g., water cement ratio, relatively humidity and time at drying). The simulation results demonstrate that ignoring creep and shrinkage could lead to significant underestimation of the long-term deflection of a prestressed concrete member. The model will prove useful in reducing the long-term deflection of the prestressed concrete members via the optimal selection of a concrete mix and prestressing forces.

키워드

참고문헌

  1. ACI (2002), "Committee 318, Building code requirements for structural concrete", Farmington Hills, MI, American Concrete Institute.
  2. Au, F.T.K. and Si, X.T. (2011), "Accurate time-dependent analysis of concrete bridges considering concrete creep, concrete shrinkage and cable relaxation", Eng. Struct., 33(1), 118-126. https://doi.org/10.1016/j.engstruct.2010.09.024
  3. Balaguru, P. (1991), "Prediction of the effect of fatigue loading on the serviceability of reinforced and prestressed concrete members", International Symposium on Fatigue and Fracture in Steel and Concrete Structures, 521-535.
  4. Bazant, Z.P. (1995), "Creep and shrinkage prediction model for analysis and design of concrete structures - model B3", Mater. Struct., 28, 357-365. https://doi.org/10.1007/BF02473152
  5. Bazant, Z.P. and Baweja, S. (1995), "Creep and shrinkage prediction model for analysis and design of concrete structures: Model B3", Adam Neville Symposium: Creep and Shrinkage-Structural Design Effects, ACI SP194, A. A1-Manaseer, Farmington Hills, Michigan.
  6. Bazant, Z.P. and Chern, J.C. (1985), "Concrete creep at variable humidity: Constitutive law and mechanism", Mater. Struct., 18(1), 1-20. https://doi.org/10.1007/BF02473360
  7. Bazant, Z.P. and Kim, J.K. (1991), "Improved prediction model for time-dependent deformations of concrete: Part 2 - Basic cree", Mater. Struct., 24(6), 409-421. https://doi.org/10.1007/BF02472014
  8. Bazant, Z.P. and Kim, J.K. (1992a), "Improved prediction model for time-dependent deformations of concrete: Part 3 - Creep at drying", Mater. Struct., 25(1), 21-28. https://doi.org/10.1007/BF02472209
  9. Bazant, Z.P. and Kim, J.K. (1992b), "Improved prediction model for time-dependent deformations of concrete: Part 4 - Temperature effects", Mater. Struct., 25(2), 84-94. https://doi.org/10.1007/BF02472461
  10. Bazant, Z.P. and Kim, J.K. (1992c), "Improved prediction model for time-dependent deformations of concrete: Part - load and cyclic humidity", Mater. Struct., 25(3), 163-169. https://doi.org/10.1007/BF02472430
  11. Bazant, Z.P., Kim, J.K. and Panula, L. (1991), "Improved prediction model for time-dependent deformations of concrete: Part 1 - Shrinkage", Mater. Struct., 24(5), 327-345. https://doi.org/10.1007/BF02472066
  12. Bazant, Z.P., Kim, J.K., Xi, Y. and Baweja, S. (1993), "Improved prediction model for time-dependent deformations of concrete: Part 7 - Short form of BP-KX model, statistics and extrapolation of short-time data", Mater. Struct., 26(10), 567-574. https://doi.org/10.1007/BF02472831
  13. Bazant, Z.P. and Panula, L. (1978), "Practical prediction of time-dependent deformations of concrete (Part II: Basic creep)", Mater. Struct., 11(5), 317-328.
  14. Bazant, Z.P. and Panula, L. (1980), "Creep and shrinkage characterization for analyzing prestressed concrete structures", J. Prestressed Concrete Inst., 25 (3), 86-122.
  15. Bazant, Z.P., Panula, L., Kim, J.K. and Xi, Y. (1992), "Improved prediction model for time-dependent deformations of concrete: Part 6 - Simplified code-type formulation", Mater. Struct., 25(4), 219-223. https://doi.org/10.1007/BF02473066
  16. Bazant, Z. P., Yu, Q., Li, G.H., Klein, G.J. and Kristek, V. (2010), "Excessive deflections of record-span prestressed box girder", Concrete Int., 32(6), 44-52.
  17. CEB and Chiorino, M.A. (1993), "Revision of the design aids of the CEB design manual structural effects of time dependent behaviour of concrete, in accordance with the CEB-PIF Model Code 1990", CEB-PIF Model Code 1990, Bulletion d'Information N. 215, 297.
  18. Chaudhary, S., Pendharkar, U. and Nagpal, A.K. (2008), "Service load behavior of low rise composite frames considering creep, shrinkage and cracking", Latin Am. J. Sol. Struct., 5(4), 237-258.
  19. Gardner, N.J. and Zhao, J.W. (1993), "Creep and shrinkage revisited", Mater. J., 90(3), 236-246.
  20. Islam, M.J., Liu, Z. and Swaddiwudhipong, S. (2011), "Numerical study on concrete penetration/perforation under high velocity impact by ogive-nose steel projectile", Comput. Concr., 8(1), 111-123. https://doi.org/10.12989/cac.2011.8.1.111
  21. Kazuo, S., Ohno, Y., Miyamaru, T. and Masaru, Y. (1986), "Flexural behaviour of partially prestressed concrete beams",Tran. Japan Concrete Institute, 8, 242-252.
  22. Kenneth, L. (1991), Reinforced concrete design, McGraw-Hill, USA.
  23. Khora, E.H., Rosowsky, D.V. and Stewartc, M.G. (2001), "Probabilistic analysis of time-dependent deflections of RC flexural members", Comput. Struct., 79 (16), 1461-1472. https://doi.org/10.1016/S0045-7949(01)00047-5
  24. Koh, C.G., Ang, K.K. and Zhang, L. (1997), "Effects of repeated loading on creep deflection of reinforced concrete beams", Eng. Struct., 19(1), 2-18. https://doi.org/10.1016/S0141-0296(96)00028-4
  25. Li, G., Huang, Y. and Chen, C. (2011), "Effects of humidity field on creep of reinforced concrete beams", Adv. Mater. Res., 250-253, 1765-1768. https://doi.org/10.4028/www.scientific.net/AMR.250-253.1765
  26. Naaman, A.E. and Siriakson, A. (1979), "Serviceability based design of partially presstressed beams (Part I: Analytic formulation)", J. Prestress. Concrete Ins., 24(2), 64-89.
  27. Ngab, A.S., Nilson, A.H. and Slate, F.O. (1981), "Shrinkage and creep of high strength concrete", ACI J., 78(4), 255-261.
  28. Robertson, I.N. (2005), "Prediction of vertical deflections for a long-span prestressed concrete bridge structure", Eng. Struct., 27(12), 1820-1827. https://doi.org/10.1016/j.engstruct.2005.05.013
  29. Whaley, C.P. and Neville, A.M. (1973), "Non-elastic deformation of concrete under cyclic compression", Concrete Res., 25(84), 145-154. https://doi.org/10.1680/macr.1973.25.84.145

피인용 문헌

  1. Monitoring the Dynamic Behavior of The Merlynston Creek Bridge Using Interferometric Radar Sensors and Finite Element Modeling vol.09, pp.01, 2017, https://doi.org/10.1142/S175882511750003X
  2. Detecting structural damage to bridge girders using radar interferometry and computational modelling vol.24, pp.10, 2017, https://doi.org/10.1002/stc.1985
  3. Refined calculation of time-dependent prestress losses in prestressed concrete girders vol.16, pp.10, 2020, https://doi.org/10.1080/15732479.2020.1712438