A Study on the Multiple Presence of Vehicles on Bridges

Chan, Tommy H.T. & Miao, T.J. (2002) A Study on the Multiple Presence of Vehicles on Bridges. In Brett, P.H., Banthia, N., & Buckland, P.G. (Eds.) Structural Engineering and Mechanics, The Canadian Society for Civil Engineering, Vancouver, BC Canada, pp. 707-722.


This paper presents a study on the multiple presence based on a 10-year Weigh-in-Motion records acquircd in Hong Kong. Thc multiple prescnce depends on several parameters, such as the site, the road type, the demand of transport, so that its mathematical description is particularly complex. A ease study on two-lane two-way bridges with a span of about 20m was carried out to investigate the effects of multiple presence. Using arbitrary-point-in-time distributions of mid-span moments corresponding to single and two lane events, multiple presence factors are obtained for the specified average recurrence intervals. The arbitrary-point-in-time distributions of moments for two lanes are derived using the convolution integral and the distribution for a single lane. The multi-lane reduction factors can be obtained finally by comparing the responses of multiple presence events. The convolution methodology permits the ADTI to be altered analytically, provided the reduction in average headway does not significantly alter the arbitrary-point-in-time distribntions of response. It is suggested that a range of multiple presence factors from 0.75 to 0.80 should be used for two-lane multiple presence in Hong Koug. The study conld be extended to the eases for more than two lanes.

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ID Code: 12831
Item Type: Conference Paper
Refereed: Yes
Additional Information: For more information, please contact the author.
ISSN: ISBN 1894662024
Subjects: Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000)
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
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2002 (please consult author)
Deposited On: 05 Mar 2008 00:00
Last Modified: 10 Aug 2011 16:08

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