Effect of Pier Section Reinforcement on Inelastic Behavior of Steel I-Girder Bridges
Publication: Journal of Bridge Engineering
Volume 18, Issue 1
Abstract
This paper presents the results of an analytical study on inelastic behavior of a four-span continuous composite bridge girder. The objective is to evaluate the effect of pier section reinforcement on strength and ductility of the girder. The reinforcement consists of two pairs of longitudinal ribs bolted to the web of steel sections adjacent to interior piers. Nonlinear finite element analyses are carried out to determine the moment-curvature characteristic of the pier sections. The results indicate that unreinforced sections fail due to local buckling upon yielding of the compression flange whereas the reinforced sections reach their plastic moment capacity with good ductility. Idealized moment-curvature curves are developed based on the nonlinear analyses of the sections. The idealized curves are then used to evaluate the behavior of the girder. The results indicate that strength and ductility of the girder improves substantially when the pier sections are reinforced. At failure, the maximum vertical deflection of the reinforced girder is about twice the deflection of the unreinforced girder. The ultimate load carrying capacity of the reinforced girder is also significantly larger than that of the unreinforced girder.
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References
AASHTO. (2001). LRFD bridge design specifications, 2nd Ed., American Association of State Highway and Transportation Officials, Washington, DC.
AISC. (1999). Load and resistance factor design specification for structural steel buildings, 3rd Ed., AISC, Chicago, IL.
Ansourian, P. (1982). “Plastic rotation of composite beams.” J. Struct. Div., 108(3), 643–659.
Barker, M. G., Hartnagel, B. A., Schilling, C. G., and Dishongh, B. E. (2000). “Simplified inelastic design of steel girder bridges.” J. Bridge Eng., 5(1), 58–66.
Barth, K. E., White, D. W., and Bobb, B. M. (2000). “Negative bending resistance of HPS70W girders.” J. Construct. Steel Res., 53(1), 1–31.
Barth, K. E., Hartnagel, B. A., White, D. W., and Barker, M. G. (2004). “Recommended procedures for simplified inelastic design of steel I-girder bridges.” J. Bridge Eng., 9(3), 230–242.
Baskar, K., and Shanmugam, N. E. (2003). “Steel-concrete composite plate girders subject to combined shear and bending.” J. Construct. Steel Res., 59(4), 531–557.
Bleich, F. (1952). Buckling strength of metal structures, McGraw Hill, New York.
Carskaddan, P. S. (1980). “Autostress design of highway bridges, phase 3: Interior-support-model test (AISI Project 188).” Technical Rep. No. 97-H-045(019-5), United States Steel Research Laboratory, Monroeville, PA.
Galambos, T. V., Leon, R. T., French, C. W., Barker, M. G., and Dishongh, B. E. (1993). “Inelastic rating procedures for steel beam and girder bridges.” Nat. Cooperative Hwy. Res. Program, Rep. No. 352, Transportation Research Board, Washington, DC.
Grubb, M. A. (1987). “The AASHTO guide specification for alternate load factor design procedures for steel beam bridges using braced compact sections.” AISC Eng. J., 24(1), 1–10.
Grubb, M. A., and Carskaddan, P. S.(1981). “Autostress design of highway bridges, phase 3: moment rotation requirements.” Research Laboratory Rep., United States Steel, Monroeville, PA.
Haaijer, G., Carskaddan, P. S., and Grubb, M. A. (1983). “Autostress design of steel bridges.” J. Struct. Div., 109(1), 188–199.
Hartnagel, B. A., and Barker, M. G. (2000). “Inelastic design and testing of steel bridges comprising noncompact sections.” AISC Eng. J., 37(1), 3–12.
Mans, P., Yakel, A., and Azizinamini, A. (2001). “Full scale testing of composite plate girders constructed using 485 MPa high performance steel.” J. Bridge Eng., 6(6), 598–604.
Moore, M., and Grubb, M. A. (1990). “Behavior of a two-span continuous plate girder bridge design by the alternate load factor method.” AISC Eng. J., 27(4), 132–149.
Roeder, C. W., and Eltvik, L.(1985). “Autostress design criteria-load test of the Whitechuck River Bridge.” FHWA Proj. No. DTFH61-81-C-00114, Univ. of Washington, Seattle, WA.
Schilling, C. G. (1985). “Moment-rotation tests of steel bridge girders.” Rep. on Proj. 188, American Iron and Steel Institute, Washington, DC.
Schilling, C. G., and Morcos, S. S. (1988). “Moment-rotation tests of steel girders with ultracompact flanges.” Rep. on Proj. 188, American Iron and Steel Institute, Washington, DC.
Vasseghi, A. (2009). “Improving strength and ductility of continuous composite plate girder bridges.” J. Construct. Steel Res., 65(2), 479–488.
Vasseghi, A., and Frank, K. H.(1987). “Static shear and bending strength of composite plate girders.” Final Rep. AISI Laboratory Rep. No. 87-4, Univ. of Texas, Austin, TX.
Yakel, A. J., and Azizinamini, A. (2005). “Improved moment strength prediction of composite plate girders in positive bending.” J. Bridge Eng., 10(1), 28–38.
Wittry, D. M. (1993). “An analytical study of the ductility of steel-concrete composite sections.” M.S. thesis, Univ. of Texas, Austin, TX.
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© 2013 American Society of Civil Engineers.
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Received: Mar 13, 2011
Accepted: Oct 5, 2011
Published online: Oct 7, 2011
Published in print: Jan 1, 2013
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