Steel and Composite Structures

  • 제46권4호
  • /
  • Pages.539-551
  • /
  • 2023
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Study on the fire resistance of castellated composite beams with ortho-hexagonal holes and different beam-end constraints

  • Junli Lyu (School of Civil Engineering, Shandong Jianzhu University) ;
  • Encong Zhu (School of Civil Engineering, Shandong Jianzhu University) ;
  • Rukai Li (School of Civil Engineering, Shandong Jianzhu University) ;
  • Bai Sun (School of Civil Engineering, Shandong Jianzhu University) ;
  • Zili Wang (School of Civil Engineering, Shandong Jianzhu University)
  • 투고 : 2022.03.29
  • 심사 : 2023.02.01
  • 발행 : 2023.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

In order to study the fire resistance of castellated composite beams with ortho-hexagonal holes and different beam-end restraints, temperature rise tests with constant load were conducted on full-scale castellated composite beams with ortho-hexagonal holes and hinge or rigid joint constraints to investigate the temperature distribution, displacement changes and failure patterns of castellated composite beams with two different beam-end constraints during the whole course of fire. The results show that (1) During the fire, the axial pressure and horizontal expansion deformation generated in the rigid joint constrained composite beam were larger than those in the hinge joint constrained castellated composite beam, and their maximum horizontal expansion displacements were 30.2 mm and 17.8 mm, respectively. (2) After the fire, the cracks on the slab surface of the castellated composite beam with rigid joint constraint were more complicated than hinge restraint, and the failure more serious; the lower flange and web at the ends of the castellated steal beams with hinge and rigid joint constraint produced serious local buckling, and the angles of the ortho-hexagonal holes at the support cracked; the welds at both ends of the castellated composite beam with rigid joint constraint cracked. (3) Based on the simplified calculation method of solid-web composite beam, considering the effect of holes on the web, this paper calculated the axial force and displacement of the beam-end constrained castellated composite beams under fire. The calculation results agreed well with the test results.

키워드

과제정보

The research described here received financial support from the Key Program of National Natural Science Foundation of China (Project No.52038006) and the General Program of National Natural Science Foundation of China (Project No.51878398 and 52178490).

참고문헌

  1. Ahn, J. and Lee, C. (2017), "Fire behavior and resistance of partially encased and slim-floor composite beams. Journal of Constructional Steel Research", J. Construct. Steel Res., 129, 276-285. https://doi.org/10.1016/j.jcsr.2016.11.018.
  2. Bihina, G., Zhao, B. and Bouchair. A. (2013), "Behaviour of composite steel-concrete cellular beams in fire", Eng. Struct., 56, 2217-2228. http://doi.org/10.1016/j.engstruct.2013.09.002.
  3. Bukulmez, P.S. and Celik. O.C. (2020), "Experimental study on fire behavior of steel-concrete composite cellular beams with large opening ratio", Int. J. Steel Struct., 20(1), 207-231. https://doi.org/10.1007/s13296-019-00281-9.
  4. Drury, M.M., Kordosky, A.N. and Quiel. S.E. (2021), "Robustness of a partially restrained, partially composite steel floor beam to natural fire exposure: Novel validation and parametric analysis", J. Build. Eng., 44, https://doi.org/10.1016/j.jobe.2021.102533.
  5. Jia, L.G., Jiao, Y.M., Bi, Y. and Zhang. X. (2020), "Experimental study on performance of castellated composite beams at high temperature", Ind. Construct., http://kns.cnki.net/kcms/detail/11.2068.tu.20200323.1150.002.html.
  6. Jia, L.G., Wang, Y.H., Wang, L.S. and Zhang, X. (2018), "Study on fire resistance of steel castellated beam-concrete slab composite beams", J. Shenyang Jianzhu Univ., (Natural Science). 34(5), 769-776. http://doi.org/10.11717/j.issn:2095-1922.2018.05.01.
  7. Lyu, J.L., Cai, Y.Y., Li, Y., Lyu, J.J., Zhong, C.Q. and Fan, L.L. (2021), "Experimental study on fire resistance of laminated-slab composite beams under hinged connection", J. Build. Struct., 42(3), 144-153. http://doi.org/10.14006 /j.jzjgxb.2019.0600. https://doi.org/10.14006/j.jzjgxb.2019.0600
  8. Lyu, J.L., Chen, Q.C., Lyu, J.J., Cai, Y.Y. and Zhou, S.N. (2020), "Fire resistance of integral composite beams with superposed slabs", Struct. Concrete., 21(6), 2481-2493. http://doi.org/10.1002/suco.202000115.
  9. Lyu, J.L., Dong, Y.L. and Yang, Z.N. (2010), "Study of the composite beams failure modes in whole structure under fire", J. Shenyang Jianzhu Univ. (Natural Science), 26(5), 823-827.
  10. Lyu, J.L., Lyu, J.J., Cai, Y.Y. and Zhong, C.Q, (2020), "Research and numerical analysis on fire-resistance performance of separated composite beams with laminated slab", Eng. Mech., 37(5), 249-256. http://doi.org/10.6052/j.issn.1000-4750.2019.09.0535.
  11. Li, Y., Lyu, J.L., Cai, Y.Y., Lyu, J.J. and Zhong. C.Q. (2020), "Experimental study and numerical simulation on fire-resistance performance of cast-in-place composite beams", Build. Struct., 50(06), 15-20. http://doi.org/10.19701 /j.jzjg.2020.06.003. https://doi.org/10.19701/j.jzjg.2020.06.003
  12. Lyu, J.L., Li, R.K., Zhu, J., Qi, Y., Chen, Q.C., Sun, B. and Wang. Z.L. (2021), "Fire resistance of two types of composite beams constrained by rigid joint", Eng. Struct., 249, 113337. https://doi.org/10.1016/j.engstruct.2021.113337.
  13. Li, G.Q., Wang, Y.Z. and Hao, K.C. (2007), "Experimental investigation on fire-resistant behavior of restrained composite beams", J.Natural Disasters., 16(6), 93-98.
  14. Li, G.Q., Wang, Y.Z. and Cui, D.G. (2009), "Experimental investigation and theoretical analysis of restrained composite beam subjected to fire", J. Build. Struct., 30(5), 177-183.
  15. Li, G.Q., Wang, Y.Z. and Wang, K.F. (2006), "Research on fire resistance capacity of composite beams with considering axial restrains", Chinese Quart. Mech., 4, 726-732.
  16. Lyu, J.L., Zhou, S.N., Chen, Q.C. and Wang, Y. (2021), "The bearing capacity of monolithic composite beams with laminated slab throughout fire process", Steel Compos. Struct., 38(1), 87-102. https://doi.org/10.12989/scs.2021.38.1.087.
  17. Li, G.Q. and Zhou. H.Y. (2007), "Experimental study on the fire resistance of steel-concrete composite beams", China Civil Eng. J., 40(10), 19-08.
  18. Wang, Y.Z. and Li. G.Q. (2008), "Research on fire-resistance capacity of composite beams with considering structural integrity", Chinese Quarterly Mech., 17(3), 96-105. https://doi.org/10.13577/j.jnd.2008.0317.
  19. Zhang, J.C., Zhang, D.S., Dong, Y.L. and Wang. W.H. (2019), "Experimental study on internal force variation of steel-concrete composite beam under fire", Eng. Mech., 36(6), 183-192. https://doi.org/10.6052/j.issn.1000-4750.2018.05.0281.