Dynamic Analysis of Existing Continuous Bridge
Publication: Journal of Bridge Engineering
Volume 3, Issue 1
Abstract
This paper presents the investigation of the effect of dynamic loads on the dynamic amplification factors (DAFs) of an existing continuous bridge. A three-dimensional analytical model to idealize the vehicle and a finite element model to analyze the bridge have been developed. Experimental testing of this existing bridge has been conducted by the Ministry of Transportation, Quebec. Two vehicle models, having seven and 11 degrees of freedom with and/or without trailers, are considered in the analysis of the interaction between the bridge and vehicles. Based on International Standards Organization specifications, the road-surface roughness of the approach roadways and bridge deck is generated from the power-spectral density function for very good, good, and average roads. The solutions obtained from the present models are compared with the experimental results for different vehicle speeds. The DAFs are computed from the present finite element model for three different types of measurements (displacements, strains, and reactions). The numerical results show that the DAFs computed with displacements are less than those estimated from strains and reactions. It is concluded that current design codes tend to underestimate dynamic amplification factors, especially for long-span continuous bridges.
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References
1.
Canadian Highway Bridge Design Code. (1996). Can. Standard Assn., Rexdale, Ontario, Canada.
2.
Design of highway bridges. (1988). CAN/CSA-S6, Can. Standard Assn., Rexdale, Ontario, Canada.
3.
Dodds, C. J. (1972). “BSI proposals for generalized terrain dynamic inputs to vehicles.” ISO/TC/108/WG9, Document No. 5, Int. Org. for Standardization.
4.
Dodds, C. J., and Robson, J. D.(1973). “The description of road surface roughness.”J. Sound Vib., 31(2), 175–183.
5.
Draft bridge design specification (in limit state format). (1987). Nat. Assn. of Australian State Road Authorities, Sydney, Australia.
6.
Fafard, M., Bennur, M., and Savard, M.(1996). “A general multi-axle vehicle model to study the bridge-vehicle interaction.”Engrg. Computations, 14(5), 491–508.
7.
Fafard, M., Mallikarjuna, and Savard, M. (1993). “Dynamics of bridge-vehicule interaction.”Proc., 2nd Eur. Conf. Struct. Dyn. (EURODYN), T. Moan, ed., Balkema, Rotterdam, 951–960.
8.
Halchini, C., and Savard, M. (1993). “Essais extensométriques: Pont sur la rivière Portneuf.”File P-06157, Quebec Ministry of Transportation, Quebec, Canada (in French).
9.
Henchi, K. (1995). “Analyses dynamiques des ponts par éléments finis sous la sollicitation de véhicules mobiles,” PhD thesis, Université de Technologie de Compiègne, Division M. N. M., France (in French).
10.
Huang, T.(1976). “Vibration of bridges.”J. Shock Vib. Dig., 8, 61–76.
11.
Huang, D., Wang, T. L., and Shahawy, M.(1992). “Impact analysis of continuous multigirder bridges due to moving vehicles.”J. Struct. Engrg., ASCE, 118(12), 3427–3443.
12.
Laflamme, M., Fafard, M., Mallikarjuna, and Boudjelal, M. T. (1995). “Détermination du facteur d'amplification dynamique des ponts par une approche numérique et expérimentale.”Report GCS-95-04, Dept. of Civ. Engrg., Facu. of Sci. and Engrg., Laval University, Quebec, Canada (in French).
13.
Mallikarjuna. (1989). “Fefined theories with C0 finite elements for free vibration and transient dynamics of anisotropic composite-sandwich plates,” PhD thesis, Indian Inst. of Technol., Bombay, India.
14.
Massicotte, B., and Picard, A. (1990). “Développement d'un camion de calcul adapté aux camions circulant au Québec.” Conférence de l'Association des routes et transports du Canada (ARTC), Calgary, Canada, Vol. 2, 619–635 (in French).
15.
Nowak, A. S.(1995). “Calibration of LRFD Bridge Code.”J. Struct. Engrg., ASCE, 121(8), 1245–1251.
16.
Ontario Highway Bridge Design Code. (1979). Highway Engrg. Div., Ontario Ministry of Transp. and Communication, Ontario, Canada.
17.
Ontario Highway Bridge Design Code. (1983). Highway Engrg. Div., Ontario Ministry of Transp. and Communication, Ontario, Canada.
18.
Ontario Highway Bridge Design Code. (1991). Highway Engrg. Div., Ontario Ministry of Transp. and Communication, Ontario, Canada.
19.
Paultre, P., Challal, O., and Proulx, J.(1992). “Bridge dynamics and dynamic amplification factors—a review of analytical and experimental findings.”Can. J. Civ. Engrg., 19(2), 260–278.
20.
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.
21.
Recommended design loads for bridges. (1981). J. Struct. Div., ASCE, 107(7), 1161–1213.
22.
Savard, M., Fafard, M., and Beaulieu, D. (1993). “Etude par éléments finis du facteur d'amplification dynamique des charges dans les ponts sollicités par des véhicules routiers.”Report GCT-93-07, Dept. of Civ. Engrg., Facu. of Sci. and Engrg., Laval University, Quebec City, Quebec, Canada (in French).
23.
Standard specifications for highway bridges. Am. Assn. of State Hwy. and Transp. Officials (AASHTO). (1977). Washington, D.C.
24.
Standard specifications for highway bridges. Am. Assn. of State Hwy. and Transp. Officials (AASHTO). (1994). Washington, D.C.
25.
Wang, T. L., and Huang, D. (1992a). “Computer modeling analysis in bridge evaluation.”Report FL/DOT/RM/42, Florida Dept. of Transp., Tallahassee, Fla.
26.
Wang, T. L., and Huang, D.(1992b). “Cable-stayed bridge vibration due to road surface roughness.”J. Struct. Engrg., ASCE, 118(5), 1354–1374.
27.
Wang, T. L., Huang, D., and Shahawy, M.(1992a). “Dynamic response of multigirder bridges.”J. Struct. Engrg., ASCE, 118(8), 2222–2238.
28.
Wang, T. L., Shahawy, M., and Huang, D.(1992b). “Impact in highway prestressed concrete bridges.”Comp. and Struct., 44(3), 525–534.
29.
Wang, T. L., Shahawy, M., and Huang, D.(1993). “Dynamic response of highway trucks due to road roughness.”Comp. and Struct., 49(6), 1055–1067.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 3 • Issue 1 • February 1998
Pages: 28 - 37
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Feb 1, 1998
Published in print: Feb 1998
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