Structural Engineering and Mechanics

  • 제18권6호
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  • Pages.745-757
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  • 2004
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Lateral buckling formula of stepped beams with length-to-height ratio factor

  • Park, Jong Sup (The 2nd Young Jong Bridge, Civil Work Division, Samsung Corporation)
  • 투고 : 2004.01.06
  • 심사 : 2004.07.15
  • 발행 : 2004.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Lateral-torsional buckling moment resistances of I-shaped stepped beams with continuous lateral top-flange bracing under a single point load on the top flange and negative end moments were investigated. Stepped beam factors and a moment gradient correction factor suggested by Park et al. (2003, 2004) were used to develop new lateral buckling formula for beam designs. From the investigation of finite element analysis (FEA), new lateral buckling formula of beams with singly or doubly stepped member changes and with continuous lateral top-flange bracing subjected to a single point load on top flange and end moments were developed. The new design equation includes the length-to-height ratio factor to account for the increase of lateral-torsional buckling moment resistance as the increase of length-to-height ratio of stepped beams. The calculation examples for obtaining lateral-torsional buckling moment resistance using the new design equation indicate that engineers should easily determine the buckling capacity of the stepped beams.

키워드

참고문헌

  1. American Institute of Steel Construction (AISC) (1998), Load and Resistance Factor Design (LRFD), 2nd Edition, Chicago, Illinois
  2. Galambos, T.V. (1998), Guide to Stability Design Criteria for Metal Structures, Wiley, New York, NY.
  3. Helwig, T.A., Frank, K.H. and Yura, J.A. (1997), "Lateral-torsional buckling of singly symmetric I-beams", J. Struct. Engrg., ASCE, 123(9), 1172-1179. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:9(1172)
  4. MSC/NASTRAN (1998), Quick Reference Guide, Version 70.5, MacNeal-Schwindler Corporation, Los Angeles, CA.
  5. MSC/PATRAN (2000), Introduction to MSC PATRAN, version 9.0, The MacNeal-Schwindler Corporation, Los Angeles, CA.
  6. Park, J.S. (2002), "Lateral-torsional buckling of beams with top flange bracing", PhD Dissertation, Auburn University, Auburn, AL.
  7. Park, J.S. and Stallings, J.M. (2003), "Lateral-torsional buckling of stepped beams", J. Struct. Engrg., ASCE, 129(11), 1457-1465. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:11(1457)
  8. Park, J.S., Stallings, J.M. and Kang, Y.J. (2004), "Lateral-torsional buckling of prismatic beams with continuous top-flange bracing", J. Const. Steel Res., 60(2), 147-160. https://doi.org/10.1016/j.jcsr.2003.08.013
  9. Timoshenko, S. and Gere, J. (1961), Theory of Elastic Stability, McGraw-Hill, New York.

피인용 문헌

  1. Inelastic Buckling Strength of Stepped I-Beams at Midspan Subjected to Uniform Bending vol.18, pp.5, 2018, https://doi.org/10.9798/KOSHAM.2018.18.5.185
  2. Experimental study on partially-reinforced steel RHS compression members vol.63, pp.3, 2017, https://doi.org/10.12989/sem.2017.63.3.385