Structural Engineering and Mechanics

  • 제72권6호
  • /
  • Pages.737-746
  • /
  • 2019
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Effects of environmental temperature and age on the elastic modulus of concrete

  • Yang, Shuzhen (Department of Bridge Engineering, Beijing Jiaotong University) ;
  • Liu, Baodong (Department of Bridge Engineering, Beijing Jiaotong University) ;
  • Li, Yuzhong (Department of Bridge Engineering, Beijing Jiaotong University) ;
  • Zhang, Minqiang (Department of Bridge Engineering, Beijing Jiaotong University)
  • 투고 : 2019.02.20
  • 심사 : 2019.08.10
  • 발행 : 2019.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Concrete mechanical properties change constantly with age, temperature, humidity and the other environmental factors. This research studies the effects of temperature and age on the development of concrete elastic modulus by a series of prism specimens. Elastic modulus test was conducted at various temperatures and ages in the laboratory to examine the effects of temperature and age on it. The experimental results reveal that the concrete elastic modulus decreases with the rise of temperature but increases with age. Then, a temperature coefficient K is proposed to describe the effects of temperature and validated by existing studies. Finally, on the basis of K, analytical models are proposed to determine the elastic modulus of concrete at a given temperature and age. The proposed models can offer designers an approach to obtain more accurate properties of concrete structures through the elastic modulus modification based on actual age and temperature, rather than using a value merely based on laboratory testing.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

This research project is supported by the National Natural Science Foundation of China (51278031).

참고문헌

  1. ACI (1973), Behavior of Concrete under Temperature Extremes, Amerrican Concrete Institute. Detroit, MI, USA.
  2. ACI Committee 209 (1997), "Prediction of Creep, Shrinkage and Temperature Effects in Concrete Structures", ACI 209R-92, ACI Committee 209, American Concrete Institute; USA.
  3. Ahmadi-Nedushan, B. (2012), "Prediction of Elastic Modulus of Normal and High Strength Concrete Using ANFIS and Optimal Nonlinear Regression Models", Construct. Build. Mater., 36(6), 665-673. https://doi.org/10.1016/j.conbuildmat.2012.06.002.
  4. ASTM International (2016), ASTM C192: Standard Practice for Making and Curing Concrete Test Specimens in Laboratory, American Society for Testing and Materials, West Conshohocken, Pennsylvania, USA.
  5. ASTM International (2012), ASTM C150: Standard Specification for Portland Cement, American Society for Testing and Materials, West Conshohocken, Pennsylvania, USA.
  6. Baalbaki, W., Aitcin, P.C. and Ballivy, G. (1992), "On Predicting Modulus of Elasticity in High-Strength Concrete", ACI Mater. J., 89(5), 517-520.
  7. fib International Federation for Concrete Structures (2013), fib Model Code for Concrete Structures 2010, Wiley-VCH Verlag GmbH and Co. KGaA., Weinheim, Germany.
  8. Gardner, D.R., Lark, R.J. and Barr, B. (2005), "Effect of conditioning temperature on the strength and permeability of normal- and high-strength concrete", Cement Concrete Res., 35(7), 1400-1406. https://doi.org/10.1016/j.cemconres.2004.08.012.
  9. He, X., Conte, J.P., Fraser, M. and Elgamal, A. (2009), "Long-term monitoring of a highway bridge", Proceedings of the 3rd International Operational Modal Analysis Conference, Portonovo, Italy, May. 29-36.
  10. International Standards Organization (2004), International Standard ISO 1920-3 Making and Curing Test Specimens, International Standards Organization, Switzerland.
  11. International Organization (2010), International Standard ISO 1920-10: Determination of Static Moduus of Elasticity in Compression, International Standards Organization, Switzerland.
  12. Jiao, Y.B., Liu, H.B, Wang, X.Q., Zhang, Y.W., Luo, G.B. and Gong, Y.F. (2014), "Temperature effect on mechanical properties and damage identification of concrete structure", Adv. Mater. Sci. Eng., 1-10.
  13. Lee, G.C., Shih T.S. and Chang, K.C. (1988), "Mechanical properties of concrete at low temperature", J. Cold Regions Eng., 2(4), 169-178. https://doi.org/10.1061/(ASCE)0887-381X(1988)2:1(13).
  14. Liu, B.D., Lv, W.J., Li, L. and Li, P.F. (2014), "Effect of moisture content on static compressive elasticity modulus of concrete", Construct. Build. Mater., 69, 133-142. https://doi.org/10.1016/j.conbuildmat.2014.06.094.
  15. Lu, Z.D. (1989), "Research on fire resistance of reinforced concrete beams", Ph.D. Dissertation, Tongji University, Shanghai.
  16. Mazzotti, C. and Marco, S. (2012), "An experimental campaign on the long-term properties of self compacting concrete", Adv. Struct. Eng. 15(7), 1155-1166. https://doi.org/10.1260/1369-4332.15.7.1155.
  17. Naus, D.J. and Graves, H.L. (2006), "A review of the effects of elevated temperature on concrete materials and structures", Proceedings of ICONE14 International Conference on Nuclear Engineering, July, Miami.
  18. Saemannt, J.C. and Washat, G.W. (1958), "Variation of mortar and concrete properties with temperature", J. American Concrete Istitute, 20(54), 385-395.
  19. Shih, T.S., Lee G.C. and Chang, K.C. (1988), "Effect of freezing cycles on bond strength of concrete", J. Struct. Eng. 114(3), 717-726. https://doi.org/10.1061/(asce)0733-9445(1988)114:3(717).
  20. Shoukry, S.N., William, G.W., Downie, B. and Riad, M.Y. (2011), "Effect of moisture and temperature on the mechanical properties of concrete", Construct. Build. Mater., 25(2), 688-696. https://doi.org/10.1016/j.conbuildmat.2010.07.020
  21. The People's Republic of China Industry Standard (2011), Specification for Mix Proportion Design of Ordinary Concrete, China Architecture and Building Press, China.
  22. The People's Republic of China National Standard (2002), Standard for Test Method of Mechanical Properties on Ordinary Concrete (GB/T 50081-2002), China Building Industry Press, Beijing, China
  23. Wang, X.Y. and Han, S.L. (2012), "Evaluation of the mechanical properties of concrete considering the effects of temperature and aging", Construct. Build. Mater., 29, 581-590. https://doi.org/10.1016/j.conbuildmat.2011.11.001
  24. Washa, G.W. and Fluck, P.G. (1950), "Effect of sustained loading on compressive strength and modulus of elasticity of concrete", J. American Concrete Institute, 21(9), 693-700.
  25. Yamane, S., Kasami, H. and Okuno, T. (1978), "Properties of concrete at very low temperatures", SP55-09, Special Publication, 55, 207-222.
  26. Yang, S.Z., Liu, B.D., Yang, M.Z. and Li, Y.Z. (2018), "Long-Term Development of Compressive Strength and Elastic Modulus of Concrete", Struct. Eng. Mech., 66(2), 263-271. https://doi.org/10.12989/sem.2018.66.2.00
  27. Zheng, J.F. (2015), "Research on Temperature Influences in Bridge Model Frequency Identification", M.Sc. Dissertation, Jilin University, Jilin.