DOI QR코드

DOI QR Code

Prediction of thermal stress in concrete structures with various restraints using thermal stress device

  • Cha, Sang Lyul (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, Yun (Department of Civil Engineering, Daejeon University) ;
  • An, Gyeong Hee (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Jin Keun (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
  • 투고 : 2015.10.02
  • 심사 : 2015.11.30
  • 발행 : 2016.02.25

초록

Generally, thermal stress induced by hydration heat causes cracking in mass concrete structures, requiring a thorough control during the construction. The prediction of the thermal stress is currently undertaken by means of numerical analysis despite its lack of reliability due to the properties of concrete varying over time. In this paper, a method for the prediction of thermal stress in concrete structures by adjusting thermal stress measured by a thermal stress device according to the degree of restraint is proposed to improve the prediction accuracy. The ratio of stress in concrete structures to stress under complete restraint is used as the degree of restraint. To consider the history of the degree of restraint, incremental stress is predicted by comparing the degree of restraint and the incremental stress obtained by the thermal stress device. Furthermore, the thermal stresses of wall and foundation predicted by the proposed method are compared to those obtained by numerical analysis. The thermal stresses obtained by the proposed method are similar to those obtained by the analysis for structures with internally as well as externally strong restraint. It is therefore concluded that the prediction of thermal stress for concrete structures with various boundary conditions using the proposed method is suggested to be accurate.

키워드

과제정보

연구 과제 주관 기관 : NRF

참고문헌

  1. ACI 207.2R-07 (2007), Report on Thermal and Volume Change Effects on Cracking of Mass Concrete, ACI Committee 207, Detroit, Mich.
  2. ACI 209R-92 (2008), Prediction of Creep, Shrinkage, and Temperature Effects in Concrete Structures, ACI Committee 209, Detroit, Mich.
  3. Amin, M.N., Kim, J.S., Lee, Y. and Kim, J.K. (2009), "Simulation of the thermal stress in mass concrete using a thermal stress measuring device", Cement Concrete Res., 39(3), 154-164. https://doi.org/10.1016/j.cemconres.2008.12.008
  4. Bazant, Z.P., Baweja, S., Acker, P., Carol, I., Catarino, J., Chern, J.C., Heut, C., Wittmann, F.H. and Carreira, D. (1995), "Creep and shrinkage prediction model for analysis and design of concrete structures - Model B-3", Mater. Struct., 28, 357-365. https://doi.org/10.1007/BF02473152
  5. Bazant, Z.P. and Carol, I. (1993), "Creep and shrinkage of concrete", Proceedings of the 5th International RILEM Symposium, Barcelona, September.
  6. Breitenbucher, R. (1990), "Investigation of thermal cracking with the cracking-frame", Mater. Struct., 23(3), 172-177. https://doi.org/10.1007/BF02473015
  7. Chu, I., Lee, Y., Amin, M.N., Jang, B.S. and Kim, J.K. (2013), "Application of a thermal stress device for the prediction of stresses due to hydration heat in mass concrete structure", Constr. Build. Mater., 45, 192-198. https://doi.org/10.1016/j.conbuildmat.2013.03.056
  8. De Schutter, G. (2002), "Fundamental study of early age concrete behaviour as a basis for durable concrete structures", Mater. Struct., 35(1), 15-21. https://doi.org/10.1007/BF02482085
  9. Deborst, R. and Vandenboogaard, A.H. (1994), "Finite-element modeling of deformation and cracking in early-age concrete", J. Eng. Mech., 120(12), 2519-2534. https://doi.org/10.1061/(ASCE)0733-9399(1994)120:12(2519)
  10. ElSafty, A. and Abdel-Mohti, A. (2013), "Investigation of likelihood of cracking in reinforced concrete bridge decks", Int. J. Concrete Struct. Mater., 7(1), 79-93. https://doi.org/10.1007/s40069-013-0034-3
  11. Ghali, A., Favre, R. and Elbadry, M. (2002), Concrete Structures: Stresses and Deformations, Spon Press, New York, NY, USA.
  12. Kim, J.H.J., Jeon, S.E. and Kim, J.K. (2002), "Development of new device for measuring thermal stresses", Cem. Concrete Res., 32(10), 1645-1651. https://doi.org/10.1016/S0008-8846(02)00842-6
  13. Klemczak, B. and Knoppik-Wrobel, A. (2014), "Analysis of early-age thermal and shrinkage stresses in reinforced concrete walls", ACI Struct. J., 111(2), 313-322.
  14. Lee, Y. and Kim, J.K. (2009), "Numerical analysis of the early age behavior of concrete structures with a hydration based microplane model", Comput. Struct., 87(17), 1085-1101. https://doi.org/10.1016/j.compstruc.2009.05.008
  15. Murthy, A.R., Iyer, N.R. and Prasad, B.K.R. (2013), "Evaluation of mechanical properties for high strength and ultrahigh strength concretes", Adv. Concrete Constr., 1(4), 341-358. https://doi.org/10.12989/acc2013.1.4.341
  16. Ren, W., Sneed, L.H., Yang, Y. and He, R. (2014), "Numerical simulation of prestressed precast concrete bridge deck panels using damage plasticity model", Int. J. Concrete Struct. Mater., 9(1), 45-54.
  17. Zhu, B. (2014), Thermal Stresses and Temperature Control of Mass Concrete, Elsevier, Boston, MA, USA.

피인용 문헌

  1. Thermal stress analysis of silo in radioactive waste repository considering construction conditions vol.322, 2017, https://doi.org/10.1016/j.nucengdes.2017.07.017
  2. Temperature development and cracking characteristics of high strength concrete slab at early age vol.74, pp.6, 2020, https://doi.org/10.12989/sem.2020.74.6.747
  3. Study on the performance of concrete-filled steel tube beam-column joints of new types vol.26, pp.6, 2020, https://doi.org/10.12989/cac.2020.26.6.547