Impact studies on a small composite girder bridge

O'Connor, C. (Colin) and Pritchard, R. W. Impact studies on a small composite girder bridge. St. Lucia: Dept. of Civil Engineering, University of Queensland, 1984.

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Author O'Connor, C. (Colin)
Pritchard, R. W.
Title Impact studies on a small composite girder bridge
Place of Publication St. Lucia
Publisher Dept. of Civil Engineering, University of Queensland
Publication year 1984
Sub-type Other
Open Access Status File (Publisher version)
Series Research report (University of Queensland. Dept. of Civil Engineering) ; no.CE 50.
Language eng
Total number of pages 30
Year available 1984
Subjects 290800 Civil Engineering
Formatted Abstract/Summary


Two impact studies on a small-span, composite girder highway bridge have given widely scattered impact fractions, with a maximum of 1.32 as compared with the AASHTO code value of 0.30 for this bridge. Field strains were used to measure maximum mid-span bending moments for 170 trucks in normal traffic, and these were compared with equivalent static values computed from axle weights measured by a weighbridge. Impact fractions varied from - 0.08 to + 1.32 for gross vehicle weights from 27- 44 ton. Large impact values occurred for both light and heavy vehicles and were repeated in two independent series of tests. The scatter of the results suggests that impact is vehicle dependent, and that it may vary with suspension geometry. Possible causes of high impact are discussed. 

Keyword Bridges -- Live loads
Q-Index Code AX
Q-Index Status Provisional Code
Institutional Status Unknown

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Created: Thu, 16 Aug 2012, 11:00:46 EST by Talha Alam on behalf of The University of Queensland Library