Verification of truck loads for girder bridges

Jeffrey A. Laman, Andrzej S. Nowak

Research output: Contribution to conferencePaper


Verification of load spectra for bridges is an important consideration for evaluation. The objective of this paper is to present the results of measurements of truck loads on girder bridges. The study included several structures located on interstate highways and surface streets. The study shows that truck loads are strongly site specific. There is a negative correlation between law enforcement effort and occurrence of overload trucks. Illegally loaded trucks are observed on roads not controlled by truck weigh stations. A comparison of the truck citation data and weigh-in-motion (WIM) measurements obtained in this study confirms this observation. Load spectra are measured for various components, including each girder. The results indicate that the stress spectra are component specific. Girders located directly under the traffic lanes support the largest portion of the load. This observation is important for fatigue analysis considerations. Measured loads are presented in terms of strains and gross vehicle weight (GVW). Histograms and cumulative distribution functions (CDF's) of the data are plotted for enhanced interpretation.

Original languageEnglish (US)
Number of pages14
Publication statusPublished - Jan 1 1995
EventProceedings of the 13th Structures Congress. Part 1 (of 2) - Boston, MA, USA
Duration: Apr 3 1995Apr 5 1995


OtherProceedings of the 13th Structures Congress. Part 1 (of 2)
CityBoston, MA, USA


All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Architecture

Cite this

Laman, J. A., & Nowak, A. S. (1995). Verification of truck loads for girder bridges. 907-920. Paper presented at Proceedings of the 13th Structures Congress. Part 1 (of 2), Boston, MA, USA, .