Traffic Load Models for Latvian Road Bridges With Span Length up to 30 Meters

Andris Paeglitis, Ainars Paeglitis

Abstract


Bridges are structures that propose the service life up to hundred years. However, the actual traffic load models significantly differ from the characteristic load models used in the design. The analysis of former design codes of bridges used in the last century in Latvia showed the considerable increase in values of characteristic traffic loads. The traffic loads proposed in Eurocode 1: Actions on Structures – Part 2: Traffic Loads on Bridges considerably increase the actual traffic loads passing Latvian bridges. Therefore, the use of the actual traffic load models for assessment of the load carrying capacity of the older bridges will extend the service life and save financial funds for the maintenance of the bridges. Earlier, the obtaining of the correct traffic data was complicated. Today after implementation of the Weight-in-Motion system, it is possible to collect vehicle information without interrupting traffic flow. This includes data of the number of axles, vehicle wheelbase, speed and axle loads that describes the actual loading cases on the roads and bridges. The analysis of the recorded data of Weight-in-Motion the system enabled to obtain the load distribution diagrams, to determine the position of the heaviest axel, traffic speed and intensity values. The obtained results of statistical analysis of actual traffic loads allowed developing the integrated traffic load models for bridges, based on actual traffic load in Latvia. Obtained integrated traffic load models for bridges in Latvia is used for evaluation of the value of the adjustment factor α of the load model LM1 proposed in Eurocode 1: Actions on Structures – Part 2: Traffic Loads on Bridges.

Keywords:

bridge; integrated traffic load model; statistics; vehicle load; Weigh-in-Motion (WIM) system

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References


Bailey, S. F. 1996. Basic Principles and Load Models for the Structural Safety Evaluation of Existing Road Bridges. EPFL Theses. Lausanne, EPFL. 186 p.

Keenahan, J.; OBrien, E. J.; McGetrick, P. J.; Gonzalez, A. 2014. The Use of a Dynamic Truck-Trailer Drive-By System to Monitor Bridge Damping, Structural Health Monitoring 13(2): 143–157. http://dx.doi.org/10.1177/1475921713513974

Laman, J. A.; Nowak, A. S. 1997. Site-Specific Truck Loads on Bridges and Roads, in Proc. of the ICE ‒ Transport 123(2): 119–133. http://dx.doi.org/10.1680/itran.1997.29381

Li, X.; Chen, A.; Ma, R. 2013. Review of Bridge Weigh-in-Motion, Tumu Gongcheng Xuebao/China Civil Engineering Journal 46(3): 79–85.

Miao,T. J.; Chan,T. H. T. 2002. Bridge Live Load Models from WIM Data, Engineering Structures 24(8): 1071–1084. http://dx.doi.org/10.1016/S0141-0296(02)00034-2

Nowak, A. S.; Rakoczy, P. 2013. WIM-Based Live Load for Bridges, KSCE Journal of Civil Engineering 17(3): 568–574. http://dx.doi.org/10.1007/s12205-013-0602-8

Nowak, A. S. 1993. Live Load Model for Highway Bridges, Structural Safety 13(1–2): 53–66. ISSN 01674730.

Nowak, A. S.; Hong, Y.-K. 1991. Bridge Live Load Models, Journal of Structural Engineering 117(9): 2757–2767. http://dx.doi.org/10.1061/(ASCE)0733-9445(1991)117:9(2757)

Nowak, A. S.; Heywood, R. J. 1989. Probabilistic Basis for Bridge Design Codes, in Proc. of ICOSSAR ‘89, The 5th International Conference on Structural Safety and Reliability, Part III, San Francisco, CA, USA. 2019–2026. ISBN: 0872627438

O’Brien, E. J.; González, A.; Dowling, J.; Žnidarič, A. 2013. Direct Measurement of Dynamics in Road Bridges Using a Bridge Weigh-In-Motion System, Baltic Journal of Road and Bridge Engineering 8(4): 263–270. http://dx.doi.org/10.3846/bjrbe.2013.34

O’Brien, E. J.; O’Connor, A. J.; Arrigan, J. E. 2012. Procedures for Calibrating Eurocode Traffic Load Model 1 for National Conditions, in Proc. of the 6th International Conference on Bridge Maintenance, Safety and Management. 8–12 July, 2012, Stresa, Lake Maggiore, Italy. 2597–2603. http://dx.doi.org/10.1201/b12352-397

Paeglite, I.; Paeglitis, A. 2013. The Dynamic Amplification Factor of the Bridges in Latvia, Procedia Engineering 57: 851–858. http://dx.doi.org/10.1016/j.proeng.2013.04.108

Paeglitis, A.; Paeglitis, A.; Lacis, R. 2012. Weight-in-Motion Data Analysis of Vehicle Loads of A6 Motorway in Latvia, Construction Science 13: 33–40. ISSN 1407-7328.

Paeglitis, A.; Paeglitis, A. 2010. Simple Classification Method for the Bridge Capacity Rating, Construction Science 11: 44–47. ISSN 1407-7328.

Steenbergen, R. D. J. M.; Vrouwenvelder, A. C. W. M. 2010. Safety Philosophy for Existing Structures and Partial Factors for Traffic Loads on Bridges, Heron 55(2): 123–140. ISSN: 00467316

Van De Lindt, J. W.; Fu, G.; Zhou, Y.; Pablo, R. M. 2005. Locality of Truck Loads and Adequacy of Bridge Design Load, Journal of Bridge Engineering 10(5): 622–629. http://dx.doi.org/10.1061/(ASCE)1084-0702(2005)10:5(622)

Vaziri, S. H.; Haas, C. T.; Rothenburg, L.; Haas, R. C. 2013. Investigation of the Effect of Weight Factor on Performance of Piezoelectric Weigh-in-Motion Sensors, Journal of Transportation Engineering 139(9): 913–922. http://dx.doi.org/10.1061/(ASCE)TE.1943-5436.0000561




DOI: 10.3846/bjrbe.2014.18

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