Wheel Loads from Highway Bridge Strains: Field Studies
Publication: Journal of Structural Engineering
Volume 116, Issue 7
Abstract
This paper describes further field measurements of the impact fraction, I, for Six Mile Creek Bridge, an 11.28‐m‐span composite steel and concrete grider bridge. It reports values between consistent with those found previously. It also uses bridge strains to determine records of dynamic axle loads versus time for a standard truck and 123 service vehicles, and subjects them to Fourier analysis. Although there is a relationship between impact and the magnitude of the dynamic load components, this relationship is complex. There is no simple method to identify impactive vehicles. The field data has also been used to calibrate a simple vehicle model proposed in a companion paper, in which each axle load includes a dynamic load component that varies sinusoidally at the natural frequency of the bridge. This model has been used to predict upper bound values of I for bridges of varying span, with this dynamic component set at 4, 6, and 10%. The resulting values are larger than those that have been commonly used, particularly for shorter spans.
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References
1.
Bez, R., Cantieni, R., and Jacquemoud, J. (1987). “Modeling of highway traffic loads in Switzerland.” Proc.
2.
Brameld, G. H. (1987). “Highway bridge live loads for limit states design,” thesis presented to the University of Queensland, at Queensland, Australia, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
3.
Bridge design specifications. (1976). Nat. Association of Australian State Road Authorities, Sydney, Australia.
4.
Cantieni, R. (1984). “Dynamic load testing of highway bridges.” Proc.
5.
Chan, T. H. T. (1988). “Highway bridge impact,” thesis presented to the University of Queensland, at Queensland, Australia, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
6.
Chan, T. H. T., and O'Connor, C. (1990). “Vehicle model for highway bridge impact.” J. Struct. Engrg., ASCE, 116(7), 1772–1793.
7.
Cooley, J. W., and Tukey, J. W. (1965). “An algorithm for the machine calculation of complex fourier series.” Mathematics of Computation, 19(90), 297–301.
8.
Draft bridge design specification (in limit state format). (1987). Nat. Association of Australian State Road Authorities, Sydney, Australia.
9.
O'Connor, C., and Chan, T. H. T. (1988). “Dynamic wheel loads from bridge strains.” J. Struct. Engrg., ASCE, 114(8), 1703–1723.
10.
O'Connor, C., and Chan, T. H. T. (1988). “Wheel loads from bridge strains: Laboratory studies.” J. Struct. Engrg., ASCE, 114(8), 1724–1740.
11.
O'Connor, C., and Pritchard, R. W. (1985). “Impact studies on a small composite girder bridge.” J. Struct. Engrg. J., ASCE, 111(3), 641–653.
12.
Ontario highway bridge design code. (1983). Ministry of Transp. and Communications, Ontario, Canada.
13.
Peters, R. J. (1984). “AXWAY—a system to obtain vehicle axle weights.” Proc. 12th ARRB Conf., Australian Road Research Board, 12(2), 10–18.
14.
Pritchard, R. W. (1983). “Service traffic loads on Six Mile Creek Bridge, Queensland,” thesis presented to the University of Queensland, at Queensland, Australia, in partial fulfillment of the requirements for the degree of Master of Engineering.
15.
Standard specifications for highway bridges. (1977). 12th Ed., Amer. Association of State Highway and Transport Officials, Washington, D.C.
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Copyright © 1990 ASCE.
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Published online: Jul 1, 1990
Published in print: Jul 1990
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