Two impact studies on a small-span, composite girder highway bridge have given widely scattered impact fractions. 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. 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.
Impact Studies on a Small Composite Girder Bridge
1984
40 pages
Report
No indication
English
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