Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Hysteresis of concrete-filled circular tubular (CFCT) T-joints under axial load

  • Liu, Hongqing (School of Civil Engineering, Yantai University) ;
  • Shao, Yongbo (School of Civil Engineering, Yantai University) ;
  • Lu, Ning (School of Civil Engineering, Yantai University) ;
  • Wang, Qingli (School of Civil Engineering, Shenyang Jianzhu University)
  • Received : 2014.08.23
  • Accepted : 2014.09.24
  • Published : 2015.03.25
⟨ Previous Next ⟩

Abstract

This paper presents investigations on the hysteretic behavior of concrete-filled circular tubular (CFCT) T-joints subjected to axial cyclic loading at brace end. In the experimental study, four specimens are fabricated and tested. The chord members of the tested specimens are filled with concrete along their full length and the braces are hollow section. Failure modes and load-displacement hysteretic curves of all the specimens obtained from experimental tests are given and discussed. Some indicators, in terms of stiffness deterioration, strength deterioration, ductility and energy dissipation, are analyzed to assess the seismic performance of CFCT joints. Test results indicate that the failures are primarily caused by crack cutting through the chord wall, convex deformation on the chord surface near brace/chord intersection and crushing of the core concrete. Hysteretic curves of all the specimens are plump, and no obvious pinching phenomenon is found. The energy dissipation result shows that the inelastic deformation is the main energy dissipation mechanism. It is also found from experimental results that the CFCT joints show clear and steady stiffness deterioration with the increase of displacement after yielding. However, all the specimens do not perform significant strength deterioration before failure. The effect of joint geometric parameters ${\beta}$ and ${\gamma}$ of the four specimens on hysteretic performance is also discussed.

Keywords

References

  1. ATC-24 (1992), Guidelines for cyclic seismic testing of components of steel structures, Applied Technology Council; Redwood City, CA, USA.
  2. Bergmann, R., Matsui, C., Meinsma, C. and Dutta, D. (1955), "Design guide for concrete filled hollow section columns under static and seismic loading", Comite International pour le Developpement et 1 Etude de la Construction Tubulaire (CIDECT); Verlag TUV Rheinland, Cologne, Germany.
  3. BS EN 1993-1-1:200 (2005), Eurocode 3: Design of steel structures, Part 1-1: General rules and rules for buildings, European Committee for Standardization.
  4. Chen, J., Chen, J. and Jin, W.L. (2010), "Experimental investigation of stress concentration factor of concrete-filled tubular T joints", J. Constr. Steel Res., 66(12), 1510-1515. https://doi.org/10.1016/j.jcsr.2010.06.004
  5. Feng, R. and Young, B. (2008), "Tests of concrete-filled stainless steel tubular T-joints", J. Constr. Steel Res., 64(1), 1283-1293. https://doi.org/10.1016/j.jcsr.2008.04.011
  6. Feng, R. and Young, B. (2010), "Design of concrete-filled stainless steel tubular connections", Adv. Struct. Eng., 13(3), 471-492. https://doi.org/10.1260/1369-4332.13.3.471
  7. Han, L.H. and Li, W. (2010), "Seismic performance of CFST column to steel beam joint with RC slab: Experiments", J. Constr. Steel Res., 66(1), 1374-1386. https://doi.org/10.1016/j.jcsr.2010.05.003
  8. Han, L.H. and Song, T.Y. (2012), Fire Safety Design Theory of Steel-Concrete Composite Structures, China Science Press, Beijing, China. [In Chinese]
  9. Han, L.H., Wang, W.D. and Tao, Z. (2011), "Performance of circular CFST column to steel beam frames under lateral cyclic loading", J. Constr. Steel Res., 67(5), 876-890. https://doi.org/10.1016/j.jcsr.2010.11.020
  10. Hou, C., Han, L.H. and Zhao, X.L. (2013), "Concrete-filled circular steel tubes subjected to local bearing force: Experiments", J. Constr. Steel Res., 83(4), 90-104. https://doi.org/10.1016/j.jcsr.2013.01.008
  11. Hou, C., Han, L.H. and Zhao, X.L. (2014), "Concrete-filled circular steel tubes subjected to local bearing force: Finite element analysis", Thin-Wall. Struct., 77(4), 109-119. https://doi.org/10.1016/j.tws.2013.12.006
  12. JGJ101-96 (2010), Specification for test methods of seismic building, Architecture Industrial Press of China, Beijing, China. [In Chinese]
  13. Kang, C.H., Shin, K.J., Oh, Y.S. and Moon, T.S. (2001), "Hysteretic behavior of CFT column to H-beam connections with external T-stiffeners and penetrated elements", J. Eng. Struct., 23(9), 1194-1201. https://doi.org/10.1016/S0141-0296(00)00119-X
  14. Li, W. and Han, L.H. (2011), "Seismic performance of CFST column to steel beam joints with RC slab: Analysis", J. Constr. Steel Res., 67(1), 127-139. https://doi.org/10.1016/j.jcsr.2010.07.002
  15. Li, W., Han, L.H. and Ren, Q.X. (2013), "Inclined concrete-filled SHS steel column to steel beam joints under monotonic and cyclic loading: Experiment", Thin-Wall. Struct., 62(1), 118-130. https://doi.org/10.1016/j.tws.2012.08.007
  16. Liao, F.Y., Han, L.H. and Tao, Z. (2014), "Behaviour of composite joints with concrete encased CFST columns under cyclic loading: Experiments", J. Eng. Struct., 59(2), 745-764. https://doi.org/10.1016/j.engstruct.2013.11.030
  17. Mashiri, F.R. and Zhao, X.L. (2010), "Square hollow section (SHS) T-joints with concrete-filled chords subjected to in-plane fatigue loading in the brace", Thin-Wall. Struct., 48(2), 150-158. https://doi.org/10.1016/j.tws.2009.07.010
  18. Qian, X.D., Jitpairod, K., Marshall, P., Swaddiwudhipong, S., Qu, Z.Y., Zhang, Y. and Pradana, M.R. (2014), "Fatigue and residual strength of concrete-filled tubular X-joints with full capacity welds", J. Constr. Steel Res., 100(9), 21-35. https://doi.org/10.1016/j.jcsr.2014.04.021
  19. Qin, F., Fung, T.C. and Soh, C.K. (2001), "Hysteretic behavior of completely overlap tubular joints", J. Constr. Steel Res., 57(7), 811-829. https://doi.org/10.1016/S0143-974X(01)00002-5
  20. Shao, Y.B., Li, T., Lie, S.T. and Chiew, S.P. (2011a), "Hysteretic behavior of square tubular T-joints with chord reinforcement under axial cyclic loading", J. Constr. Steel Res., 67(1), 140-149. https://doi.org/10.1016/j.jcsr.2010.08.001
  21. Shao, Y.B., Lie, S.T., Chiew, S.P. and Cai, Y.Q. (2011b), "Hysteretic performance of circular hollow section tubular joints with collar-plate reinforcement", J. Constr. Steel Res., 67(2), 1936-1947. https://doi.org/10.1016/j.jcsr.2011.06.010
  22. Sheet, I.S., Gunasekaran, U. and MacRae, G. (2013), "Experimental investigation of CFT column to steel beam connections under cyclic loading", J. Constr. Steel Res., 86(7), 167-182. https://doi.org/10.1016/j.jcsr.2013.03.021
  23. Wang, W. and Chen, Y.Y. (2007), "Hysteretic behavior of tubular joints under cyclic loading", J. Constr. Steel Res., 63(10), 1384-1395. https://doi.org/10.1016/j.jcsr.2006.12.002
  24. Yin, Y., Han, Q.H., Bai, L.J., Yang, H.D. and Wang, S.P. (2009), "Experimental study on hysteretic behavior of tubular N-joints", J. Constr. Steel Res., 65(2), 326-334. https://doi.org/10.1016/j.jcsr.2008.07.006

Cited by

  1. Investigation on SCFs of concrete-filled circular chord and square braces K-joints under balanced axial loading vol.21, pp.6, 2016, https://doi.org/10.12989/scs.2016.21.6.1227
  2. Experimental studies on behaviour of tubular T-joints reinforced with grouted sleeve vol.23, pp.5, 2017, https://doi.org/10.12989/scs.2017.23.5.585