Wheel loads from highway bridge strains: Field studies

Chan T.H.T. and O'Connor C. (1990) Wheel loads from highway bridge strains: Field studies. Journal of Structural Engineering (United States), 116 7: 1751-1771. doi:10.1061/(ASCE)0733-9445(1990)116:7(1751)


Author Chan T.H.T.
O'Connor C.
Title Wheel loads from highway bridge strains: Field studies
Journal name Journal of Structural Engineering (United States)   Check publisher's open access policy
ISSN 0733-9445
Publication date 1990
Sub-type Article (original research)
DOI 10.1061/(ASCE)0733-9445(1990)116:7(1751)
Volume 116
Issue 7
Start page 1751
End page 1771
Total pages 21
Subject 2205 Civil and Structural Engineering
2210 Mechanical Engineering
2211 Mechanics of Materials
2215 Building and Construction
2500 Materials Science
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 -0.19 and 1.25, consistent with those found previously. It also uses bridge strains to determine records of dynamic axle vloads 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.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 14 Jun 2016, 01:11:37 EST by System User