Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Structural characteristics of welded built-up square CFT column-to-beam connections with external diaphragms

  • Lee, Seong-Hui (Total Structural Engineering and Construction Ltd (TSEC)) ;
  • Yang, Il-Seung (Department of Architectural Engineering, Dongshin University) ;
  • Choi, Sung-Mo (School of Architectural Engineering, University of Seoul)
  • Received : 2009.10.09
  • Accepted : 2010.06.02
  • Published : 2010.05.25
⟨ Previous Next ⟩

Abstract

Generally, a box tube, which is used for an existing square CFT structure, is made by welding four plates. The manufacturing efficiency of this steel tube is poor, and it also needs special welding technology to weld its internal diaphragm and the through diaphragm. Therefore, an interior-anchor-type square steel tube was developed using the method of cold-forming thin plates to prevent welding of the stress concentration position, and to maximize the section efficiency. And, considering of the flow of beam flange load, the efficiency of erection and the weldability of the diaphragm to thin walled steel column, the external diaphragm connection was selected as the suitable type for the welded built-up square CFT column to beam connection. And, an analytical study and tests were conducted to evaluate the structural performance of the suggested connection details and to verify the suggested equations for the connection details. Through this study, the composite effect of the internal anchor to concrete, the resistance and stress distribution of the connections before and after the existing column is welded to the beam, the effective location of welding in connection were analyzed.

Keywords

References

  1. Architectural Institute of Korea (2004), Concrete-filled steel tube design and construction manual.
  2. Architectural Institute of Japan (1990), Guidelines and explanation of steel tube structure design and construction.
  3. Architectural Institute of Japan (1997), Design and construction guidelines for concrete-filled steel tube structures.
  4. Cheng, C.T. and Chung, L.L.(2003), "Seismic performance of steel beams to concrete-filled steel tubular column connections", J. Constr. Steel. Res., 59(3), 405-426. https://doi.org/10.1016/S0143-974X(02)00033-0
  5. Choi, S.M., Kim, D.J., Kim, J.H. and Lee, S.H. (2005), "Experimental study on seismic performance improvement of concrete-filled tubular square column-to-beam connections with combined cross-diaphragm", Int. J. Steel. Struct.(IJOSS), 5(4), 367-375.
  6. Choi, S.M., Yun, Y.S. and Kim, J.H. (2006), "Experimental study on seismic performance of concrete filled tubular square column-to-beam connections with combined cross diaphragm", Steel. Compos. Struct., 6(4), 303-317. https://doi.org/10.12989/scs.2006.6.4.303
  7. De Nardin, S. and Ana Lucia, A.L.H.C. (2004), "An experimental study of connections between I-beams and concrete filled steel tubular columns", Steel. Compos. Struct., 4(4), 303-315. https://doi.org/10.12989/scs.2004.4.4.303
  8. Fujita, Y., Takahashi, Y., Sugimoto, H., Hashimoto, Y., Nishimura, K. and Arai, T.(1999), "Simplified Exterior Diaphragm Emplyed in Beam to RHS Column Connection", Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, C-1, Structures 3.
  9. International Institute of Welding (IIW) (1989), "Design recommendations for hollow section joints-predominantly statically loaded.", IIW Doc. XV-701-89, 2nd ed, IIW Subcommission XV-E, Helsinki, Finland.
  10. Kim, Y.J., Shin, K.J. and Kim, W.J. (2008), "Effect of Stiffener Details on Behavior of CFT Column-to-Beam Connections", Int. J. Steel. Struct., 8(2), 119-133.
  11. Lee, S.H., Park, J.H., Yeom, K.S., Kim, J.H. and Choi, S.M. (2007), "Experimental study on the structural characteristics of new cold-formed CFT square-type stub columns". Research of the Korean Society of Steel Construction, Academic Conference, 665-668.
  12. Morino, S., Uchikoshi, M. and Yamaguchi, I. (2001), "Concrete-filled steel tube column system-its advantages", Int. J. Steel. Struct., 1(1), 33-44. https://doi.org/10.1296/SCS2001.01.01.03
  13. Satish Kumar, S.R. and Prasada Rao, D.V. (2006), "RHS beam-to-column connection with web opening - experimental study and finite element modeling", J. Constr. Steel. Res., 62(8), 739-746. https://doi.org/10.1016/j.jcsr.2005.11.016
  14. Shin, K.J., Kim, Y.J., Oh, Y.S. and Moon, T.S. (2004), "Behavior of welded CFT column to H-beam connections with external stiffeners", Eng. Struct., 26(13), 1877-1887. https://doi.org/10.1016/j.engstruct.2004.06.016
  15. Wu, L.Y., Chung, L.L., Tsai, S.F., Lu, C.F. and Huang, G.L. (2007), "Seismic behavior of bidirectional bolted connections for CFT columns and H-beams", Eng. Struct., 29, 395-407. https://doi.org/10.1016/j.engstruct.2006.05.007
  16. Zhang, Y., Xu, C. and Lu, X. (2007), "Experimental study of the hysteretic behavior of concrete-filled square thin-walled steel tubular columns", J. Constr. Steel. Res., 63, 317-325. https://doi.org/10.1016/j.jcsr.2006.04.014

Cited by

  1. Water-pressure test and determination of welding-throat-depth for welded built-up square CFST column vol.67, pp.7, 2011, https://doi.org/10.1016/j.jcsr.2011.02.012
  2. Test of extended thick-walled through-diaphragm connection to thick-walled CFT column vol.20, pp.1, 2016, https://doi.org/10.12989/scs.2016.20.1.001
  3. Tensile strength and concrete cone failure in CFT connection with internal diaphragms vol.17, pp.2, 2017, https://doi.org/10.1007/s13296-017-6021-9
  4. The Influence of Joint Details and Axial Force Ratios on Failure Mechanisms of SCFT Column-beam Connections vol.14, pp.1, 2015, https://doi.org/10.3130/jaabe.14.197
  5. Structural Behavior of Welded Built-up Square CFT Column to Beam Connections with External Diaphragm vol.28, pp.2, 2016, https://doi.org/10.7781/kjoss.2016.28.2.075
  6. Experimental study on two types of new beam-to-column connections vol.11, pp.4, 2011, https://doi.org/10.12989/scs.2011.11.4.291
  7. Experimental seismic behaviour of L-CFST column to H-beam connections vol.26, pp.6, 2018, https://doi.org/10.12989/scs.2018.26.6.793
  8. Interfacial Stress Concentrations of Vertical Through-plate to H-beam Connections in CFT Column vol.9, pp.4, 2010, https://doi.org/10.21022/ijhrb.2020.9.4.325