DOI QR코드

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Improved bracing systems to prevent exterior girder rotation during bridge construction

  • 투고 : 2018.11.08
  • 심사 : 2019.07.03
  • 발행 : 2019.08.10

초록

Concrete placement and temporary formwork of bridge deck overhangs result in unbalanced eccentric loads that cause exterior girders to rotate during construction. These construction loads affect the global and local stability of the girders and produce permanent girder rotation after construction. In addition to construction loads, the skew angle of the bridge also contributes to girder rotation. To prevent rotation (in both skewed and non-skewed bridges), a number of techniques have been suggested to temporarily brace the girders using transverse tie bars connecting the top flanges and embedded in the deck, temporary horizontal and diagonal steel pipes placed between the webs of the exterior and first interior girders, and permanent cross frames. This study includes a rigorous three-dimensional finite element analysis to evaluate the effectiveness of several bracing systems for non-skewed and several skewed bridges. In this paper, skew angles of $0^{\circ}$, $20^{\circ}$, $30^{\circ}$, and $45^{\circ}$ were considered for single- and three-span bridges. The results showed that permanent cross frames worked well for all bridges, whereas temporary measures have limited application depending on the skew angle of the bridge.

키워드

과제정보

연구 과제번호 : Exterior Beam Rotation Prevention Systems for Bridge Deck Construction

참고문헌

  1. Abaqus 6.13 (2013), Abaqus/CAE User's Guide, Hibbitt, Karlsson & Sorensen, Inc., Waltham, MA, USA.
  2. Apirakvorapinit, P., Mohammadi, J. and Shen, J. (2011), "Analytical investigation of potential seismic damage to a skewed bridge", Practice Period. Struct. Des. Constr., 17(1), 5-12. https://doi.org/10.1061/(ASCE)SC.1943-5576.0000094
  3. Ariyasajjakorn, D., Mirmiran, A. and Summer, E. (2006), "Review of NCDOT practices for analyzing overhang falsework", Research Report No. RD-06-04; North Carolina Department of Transportation, Raleigh, NC, USA.
  4. Ashiquzzaman, M., Hui, L., Schmeltz, J., Merino, C., Bozkurt, B., Ibrahim, A., Lindquist, W. and Hindi, R. (2016a), "Effectiveness of exterior beam rotation prevention systems for bridge deck construction", Research Report No. FHWA-ICT-16-015; Illinois Department of Transportation, Springfield, IL, USA.
  5. Ashiquzzaman, M., Hui, L., Ibrahim, A., Lindquist, W., Thomson, M. and Hindi, R. (2016b), "Effect of inconsistent diaphragms on exterior girder rotation during overhang deck construction", Structures, 8, 25-34. https://doi.org/10.1016/j.istruc.2016.08.002
  6. Ashiquzzaman, M., Calvo, C.M., Hui, L., Ibrahim, A., Lindquist, W. and Hindi, R. (2017), "Effectiveness of different bracing systems to prevent exterior girder rotation during bridge deck construction", Eng. Struct., 142, 272-289. https://doi.org/10.1016/j.engstruct.2017.04.003
  7. Choo, T.W., Linzell, D.G., Lee, J.I. and Swanson, J.A. (2005), "Response of a continuous, skewed, steel bridge during deck placement", J. Constr. Steel Res., 61(5), 567-586. https://doi.org/10.1016/j.jcsr.2004.10.009
  8. Clifton, S. and Bayrak, O. (2008), "Bridge deck overhang construction", Research Report No. IAC 88-5DD1A003-2; Texas Department of Transportation, Austin, Texas, USA.
  9. Ebeido, T. and Kennedy, J.B. (1996), "Girder moments in simply supported skew composite bridges", Can. J. Civil Eng., 23(4), 904-916. https://doi.org/10.1139/l96-897
  10. Fasl, J. (2008), "The influence of overhang construction on girder design", Master's Thesis; University of Texas, Austin, TX, USA.
  11. Fu, Z., Ji, B., Wang, Y. and Xu, J. (2018), "Fatigue performance of rib-roof weld in steel bridge decks with corner braces", Steel Compos. Struct., Int. J., 26(1), 103-113. https://doi.org/10.12989/scs.2018.26.1.103
  12. Grubb, M. (1990), "Design for concrete deck overhang loads", Final Report; AISC Marketing Inc, Chicago, IL, USA.
  13. Gupta, Y.P. and Kumar, A. (1983), "Structural behavior of interconnected skew slab-girder bridges", J. Inst. Engr. (India), 64, 119-124.
  14. Gupta, V.K., Okui, Y. and Nagai, M. (2006), "Development of web slenderness limits for composite I-girders accounting for initial bending moment", Doboku Gakkai Ronbunshuu A, 62(4), 854-864. https://doi.org/10.2208/jsceja.62.854
  15. Haskett, M., Oehlers, D.J., Ali, M.M. and Wu, C. (2009), "Rigid body moment-rotation mechanism for reinforced concrete beam hinges", Eng. Struct., 31(5), 1032-1041. https://doi.org/10.1016/j.engstruct.2008.12.016
  16. Helwig, T. and Yura, J. (2012), "Steel bridge design handbook: Bracing system design", Research Report No. FHWA-IF-12-052-Vol. 13; U.S. Department of Transportation, Federal Highway Administration, Washington, DC, USA.
  17. IDOT (2012), Standard specifications for road and bridge construction, Illinois Department of Transportation, Springfield, IL, USA.
  18. Kar, A. (2012), "Analyasis of skew bridges using computational methods", M. Tech Dissertation; Department of Civil Engineering, Institute of Technology, Banaras Hindu University, Varanasi, India.
  19. Kar, A., Khatri, V., Maiti, P.R. and Singh, P.K. (2012), "Study on effect of skew angle in skew bridges", Int. J. Eng. Res. Develop., 2(12), 13-18.
  20. Kim, H.S., Park, Y.M., Kim, B.J. and Kim, K. (2018), "Numerical investigation of buckling strength of longitudinally stiffened web of plate girders subjected to bending", Struct. Eng. Mech., Int. J., 65(2), 141-154. https://doi.org/10.12989/sem.2018.65.2.141
  21. Linzell, D., Chen, A., Sharafbayani, M., Seo, J., Nevling, D., Jaissa-Ard, T. and Ashour, O. (2010), "Guidelines for analyzing curved and skewed bridge and designing them for construction", Research Report No. FHWA-PA-2010-013-PSU-009; U.S. Department of Transportation, Federal Highway Administration, Washington, DC, USA.
  22. Menassa, C., Mabsout, M., Tarhini, K. and Frederick, G. (2007), "Influence of skew angle on reinforced concrete slab bridges", J. Bridge Eng., 12(2), 205-214. https://doi.org/10.1061/(ASCE)1084-0702(2007)12:2(205)
  23. Roddis, K., Kriesten, M. and Liu, Z. (1999), "Torsional analysis of exterior girders", Research Report No. K-TRAN: KU-96-3; Kansas Department of Transportation, Topeka, KS, USA.
  24. Roddis, W.K., Baghernejad, S. and Winters, E.L. (2008), "Cross-Frame Diaphragm bracing of steel bridge girders", Rep. No. KTRAN: KU-01-2, Kansas Department of Transportation, KS, USA.
  25. Schilling, C.G. (1988), "Moment-rotation tests of steel bridge girders", J. Struct. Eng., 114(1), 134-149. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:1(134)
  26. Shokouhian, M. and Shi, Y. (2015), "Flexural strength of hybrid steel I-beams based on slenderness", Eng. Struct., 93, 114-128. https://doi.org/10.1016/j.engstruct.2015.03.029
  27. Yang, S., Helwig, T., Klingner, R., Engelhardt, M. and Fasl, J. (2010), "Impact of overhang construction on girder design", Research Report. No. FHWA/TX-10/0-5706-1, Texas Department of Transportation, Austin, TX, USA.