Response of Prestressed Concrete I-Girder Bridges to Live Load
Publication: Journal of Bridge Engineering
Volume 6, Issue 1
Abstract
Design and evaluation of prestressed concrete I-girder bridges is in large part dependent on the transverse load distribution characteristics and the dynamic load amplification, as well as service level, live load, and tensile stresses induced in the girders. This study presents the results of field tests conducted on three prestressed concrete I-girder bridges to obtain dynamic load allowance statistics, girder distribution factors (GDF), and service level stress statistics. The field-based data are also compared to approximate and numerical model results. Bridge response was measured at each girder for the passage of test trucks and normal truck traffic. The dynamic amplification is observed to be a strong function of peak static stress and a weak function of vehicle speed and is independent of span length, number of axles, and configuration. GDFs for one- and two-lanes are less than code specified GDFs. Results from the numerical grillage models agree closely with experimentally derived results for transverse distribution.
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References
1.
American Association of State Highway and Transportation Officials (AASHTO). ( 1996). Standard specifications for highway bridges, Washington, D.C.
2.
American Association of State Highway and Transportation Officials (AASHTO). ( 1998). LRFD bridge design specifications, Washington, D.C.
3.
Bakht, B., and Pinjarkar, S. G. ( 1989). “Dynamic testing of highway bridges—A review.” Transp. Res. Rec. 1223, Transportation Research Board, National Research Council, Washington, D.C., 93–100.
4.
Billings, J. R. ( 1984). “Dynamic loading and testing of bridges in Ontario.” Can. J. Civ. Engrg., Ottawa 11(4), 833–843.
5.
Cantieni, R. ( 1983). “Dynamic load tests on highway bridges in Switzerland: 60 years of experience of EMPA. Res. Rep. 271, Swiss Federal Laboratories for Materials and Testing, Dubendorf, Switzerland.
6.
Hwang, E. S., and Nowak, A. S. (1991). “Simulation of dynamic load for bridges.”J. Struct. Engrg., ASCE, 117(5), 1413–1434.
7.
Kim, S., and Nowak, A. S. (1997). “Load distribution and impact factors for I-girder bridges.”J. Bridge Engrg., ASCE, 2(3), 97–104.
8.
Laman, J. A., Pechar, J. S., and Boothby, T. E. (1999). “Dynamic load allowance for through-truss bridges.”J. Bridge Engrg., ASCE, 4(4), 231–241.
9.
Ministry of Transportation of Ontario. ( 1983). Ontario highway bridge design code, Highway Engineering Division, Ontario, Canada.
10.
Ministry of Transportation of Ontario. ( 1992). Ontario highway bridge design code, Highway Engineering Division, Ontario, Canada.
11.
Nassif, H. H., and Nowak, A. S. ( 1995). “Dynamic load spectra for girder bridges.” Transp. Res. Rec. 1476, Transportation Research Board, National Research Council, Washington, D.C., 69–83.
12.
O'Conner, C., and Pritchard, R. W. (1985). “Impact studies on small composite girder bridge.”J. Struct. Engrg., ASCE, 111(3), 641–653.
13.
Paultre, P., Proulx, J., and Talbot, M. (1995). “Dynamic testing procedures for highway bridges using traffic loads.”J. Struct. Engrg., ASCE, 121(2), 362–376.
14.
Wang, T. L., Shahawy, M., and Huang, D. Z. ( 1992). “Impact in highway prestressed concrete bridges.” Comp. and Struct., 44(3), 525–534.
15.
Wood, J. H., and Shepherd, R. ( 1978). “Vehicle induced vibrations.” 1978 Seminar on Bridge Des. and Res., Rd. Res. Unit Bull. No. 44, 1–20.
16.
Zokaie, T., Osterkamp, T. A., and Imbsen, R. A. ( 1991). “Distribution of wheel loads on highway bridges.” Final Rep. NCHRP 12-2611, Transportation Research Board, Washington, D.C.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 6 • Issue 1 • February 2001
Pages: 1 - 8
History
Received: Jun 24, 1999
Published online: Feb 1, 2001
Published in print: Feb 2001
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