Headway modelling for traffic load assessment of short to medium span bridges

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Title: Headway modelling for traffic load assessment of short to medium span bridges
Authors: O'Brien, Eugene J.
Caprani, Colin C.
Permanent link: http://hdl.handle.net/10197/2313
Date: 16-Aug-2005
Abstract: Site-specific assessment of the loading to which existing bridges are subject has considerable potential for saving on rehabilitation and replacement costs of the bridge stock. Monte Carlo simulations, with traffic measurements from site, are used to estimate the characteristic values for load effects. In this paper, it is shown that the critical loading events from which the characteristic effects are derived, are strongly dependent on the assumptions used for the headways of successive trucks. A new approach which uses measured headway statistical distributions is developed and is shown to be a reasonable balance between conservative assumptions and less realistic scenarios. The sensitivity of characteristic load effects to conventional headway assumptions is shown to be significant.
Funding Details: European Research Council
Type of material: Journal Article
Publisher: Institution of Structural Engineers
Copyright (published version): 2005 Eugene J. OBrien & Colin C. Caprani
Keywords: Bridge;Assessment;Statistics;Headway;Gap;Load;Traffic;Simulation
Subject LCSH: Bridges--Live loads
Traffic flow--Measurement
Language: en
Status of Item: Peer reviewed
Appears in Collections:Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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