Structural Engineering and Mechanics

  • 제76권4호
  • /
  • Pages.513-528
  • /
  • 2020
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Residual behavior of recycled aggregate concrete beam and column after elevated temperatures

  • Chen, Zongping (College of Civil Engineering and Architecture, Guangxi University) ;
  • Zhou, Ji (College of Civil Engineering and Architecture, Guangxi University) ;
  • Liang, Ying (College of Civil Engineering and Architecture, Guangxi University) ;
  • Ye, Peihuan (College of Civil Engineering and Architecture, Guangxi University)
  • 투고 : 2019.06.22
  • 심사 : 2020.07.21
  • 발행 : 2020.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents the results of an experimental study on the residual behavior of reinforced recycled aggregate concrete (RRAC) beam-columns after exposure to elevated temperatures. Two parameters were considered in this test: (a) recycled coarse aggregate (RCA) replacement percentages (i.e. 0, 30, 50, 70 and 100%); (b) high temperatures (i.e. 20, 200, 400, 600, and 800℃). A total of 25 RRAC short columns and 32 RRAC beams were conducted and subjected to different high temperatures for 1 h. After cooling down to ambient temperature, the following basic physical and mechanical properties were then tested and discussed: (a) surface change and mass loss ratio; (b) strength of recycled aggregate concrete (RAC) and steel subjected to elevated temperatures; (c) bearing capacity of beam-columns; (d) load-deformation curve. According to the test results, the law of performance degradation of RRAC beam-columns after exposure to high temperatures is analyzed. Finally, introducing the influence coefficient of RCA replacement percentage and high temperatures, respectively, to correct the calculation formulas of bearing capacity of beam-columns in Chinese Standard, and then the residual bearing capacity of RRAC beam-columns subjected elevated temperatures is calculated according to the modified formulas, the calculated results are in good agreement with the experimental results.

키워드

과제정보

This research report was financially supported by the National Natural Science Foundation of China (No.51578163), the Key Project of Natural Science Foundation of Guangxi Province (No. 2016GXNSFDA380032), and High Level Innovation Group and Outstanding Scholar Programme of Guangxi High Education (No. [2017]38). The financial supports are gratefully acknowledged.

참고문헌

  1. Arezoumandi, M., Smith, A., Volz, J.S. and Khayat, K.H. (2015), "An experimental study on flexural strength of reinforced concrete beams with 100% recycled concrete aggregate", Eng. Struct., 88, 154-162. https://doi.org/10.1016/j.engstruct.2015.01.043.
  2. Choi, W.C. and Yun, H.D. (2012), "Compressive behavior of reinforced concrete columns with recycled aggregate under uniaxial loading", Eng. Struct., 41, 285-293. https://doi.org/10.1016/j.engstruct.2012.03.037.
  3. Chen, Z., Chen, J., Ning, F. and Li, Y. (2019), "Residual properties of recycled concrete after exposure to high temperatures", Mag. Concrete Res., 71, 781-793. https://doi.org/10.1680/jmacr.17.00503.
  4. Evangelista, L., Guedes, M., De Brito, J., Ferro, A.C. and Pereira, M.F. (2015), "Physical, chemical and mineralogical properties of fine recycled aggregates made from concrete waste", Construct. Build. Mater., 86, 178-188. https://doi.org/10.1016/j.conbuildmat.2015.03.112.
  5. Fathifazl, G., Razaqpur, A.G., Isgor, O.B., Abbas, A., Fournier, B. and Foo, S. (2011), "Shear capacity evaluation of steel reinforced recycled concrete (RRC) beams", Eng. Struct., 33, 1025-1033.https://doi.org/10.1016/j.engstruct.2010.12.025.
  6. GB/T 228.1-2010. (2010), Metallic materials-Tensile testing-Part1: Method of test at room temperature, Standards Press of China, Beijing, China.
  7. GB 50010-2010. (2010), Code for design of concrete structures. China Architecture and Building Press, Beijing, China.
  8. Gonzalez, V.C.L. and Moriconi, G. (2014), "The influence of recycled concrete aggregates on the behavior of beam-column joints under cyclic loading", Eng. Struct., 60, 148-154. https://doi.org/10.1016/j.engstruct.2013.12.024.
  9. Knaack, A.M. and Kurama, Y.C. (2015), "Behavior of reinforced concrete beams with recycled concrete coarse aggregates", J. Struct. Eng., 141, B4014009. https://doi.org/10.1061/(ASCE)ST.1943541X.0001118.
  10. Lv, L., Yang, H., Zhang, T. and Deng, Z. (2018), "Bond behavior between recycled aggregate concrete and deformed bars under uniaxial lateral pressure", Construct. Build. Mater., 185, 12-19. https://doi.org/10.1016 /j.conbuildmat.2018.06.226. https://doi.org/10.1016/j.conbuildmat.2018.06.226
  11. Malesev, M., Radonjanin, V. and Marinkovic, S. (2010), "Recycled Concrete as Aggregate for Structural Concrete Production", Sustainability, 2, 1204-1225. https://doi.org/10.3390 /su2051204. https://doi.org/10.3390/su2051204
  12. Ozbakkaloglu, T., Gholampour, A. and Xie, T. (2017), "Mechanical and durability properties of recycled aggregate concrete: effect of recycled aggregate size and content on the behavior", J. Mater. Civil Eng., 30, 04017275. https://doi.org/10.1061/ (ASCE)MT.1943-5533.0002142.
  13. Ozbakkaloglu, T., Gholampour, A., Xie, T. (2018), "Toward the development of sustainable concretes with recycled concrete aggregates: a comprehensive review of studies on mechanical properties", J. Mater. Civil Eng., 30, 04018211. https://doi.org/10.1061/ (ASCE) MT.1943-5533.0002304.
  14. Poon, C.S., Shui, Z.H. and Lam, L. (2004), "Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregates", Construct. Build Mater., 18, 461-468. https://doi.org/ 10.1016/j.conbuildmat.2004.03.005.
  15. Pedro, D., Brito, J.D. and Evangelista, L. (2014), "Influence of the use of recycled concrete aggregates from different sources on structural concrete", Construct. Build. Mater., 71, 141-151. https://doi.org/10.1016/j.conbuildmat. 2014.08.030.
  16. Prince M.J.R., Gaurav G. and Singh B. (2018), "Splice strength of steel reinforcement embedded in recycled aggregate concrete", Construct. Build Mater., 160, 156-168. https://doi.org/10.1016/j.conbuildmat. 2017.11.007.
  17. Seara-Paz, S., Gonzalez-Fonteboa, B., Martinez-Abella, F. and Eiras-Lopez, J. (2018), "Flexural performance of reinforced concrete beams made with recycled concrete coarse aggregate", Eng. Struct., 156, 32-45. https://doi.org/10.1016/j.engstruct.2017.11.015.
  18. Topcu, I.B. and Sengel, S. (2004), "Properties of concretes produced with waste concrete aggregate", Cement Concrete Res., 34, 1307-1312. https://doi.org/10.1016/j.cemconres.2003.12.019.
  19. Xiao, J.Z., Sun, Y.D. and Falkner, H. (2006), "Seismic performance of frame structures with recycled aggregate concrete", Eng. Struct., 28, 1-8. https://doi.org/10.1016/j.engstruct.2005.06.019.
  20. Xie, T. and Ozbakkaloglu, T. (2016), "Behavior of recycled aggregate concrete-filled basalt and carbon FRP tubes", Construct. Build. Mater., 105, 132-143. https://doi.org/10.1016/j.conbuildmat.2015.12.068.
  21. Xu, J.J., Chen, Z.P., Ozbakkaloglu, T., Zhao, X.Y. and Demartino, C. (2018), "A critical assessment of the compressive behavior of reinforced recycled aggregate concrete columns", Eng. Struct., 161-175. https://doi.org/10.1016/j.engstruct.2018.02.003.
  22. Xu, J.J., Zhao, X., Xu, J.J., Zhao, X.Y., Chen, Z.P., Liu, J.C., Xue, J.Y. and Elchalakani, M. (2019), "Novel prediction models for composite elastic modulus of circular recycled aggregate concrete-filled steel tubes", Thin-wall. Struct. https://doi.org/10.1016/j.tws.2019.106317.
  23. 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", Construct. Build. Mater., 112, 885-891.https://doi.org/10.1016/j.conbuildmat.2016.02.220.
  24. Yang, H., Lv, L., Deng, Z. and Lan, W. (2017), "Residual compressive stress-strain relation of recycled aggregate concrete after exposure to high temperatures", Struct. Concrete, 18, 479-486. https://doi.org/10.1002/suco.201500153.