Vehicle Model for Highway Bridge Impact

Chan, Tommy H.T. & O'Connor, Colin (1990) Vehicle Model for Highway Bridge Impact. Journal of Structural Engineering, 116(7), pp. 1772-1793.

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This paper suggests a simple vehicle model that may be used to estimate impact in highway bridges. In this model each axle load consists of a constant load together with a sinusoidally varying dynamic component with a frequency equal to the natural frequency of the bridge. For maximum impact the dynamic load components must be in phase with respect to time. Maximum bending moments in a simple girder are determined by the span, the static axle loads, the relative magnitude of the dynamic load component, and a bridge factor defined as the number of dynamic load maxima applied by an axle during its passage over the bridge. It is shown that for many bridges, the first natural frequency is simply related to the span and that the bridge factor is about 6. Impact values are predicted for a range of spans with a dynamic load component equal to 10% of the static load. A companion paper uses field studies to review this percentage.

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ID Code: 12823
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
Keywords: weigh, in, motion, bridges, loadings, impact factor, design
DOI: 10.1061/(ASCE)0733-9445(1990)116:7(1772)
ISSN: 0733-9445
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 1990 American Society of Civil Engineers (ASCE)
Deposited On: 05 Mar 2008 00:00
Last Modified: 10 Aug 2011 16:34

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