Modeling same-direction two-lane traffic for bridge loading
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|Title:||Modeling same-direction two-lane traffic for bridge loading||Authors:||O'Brien, Eugene J.
|Permanent link:||http://hdl.handle.net/10197/3062||Date:||Jul-2011||Abstract:||Many highway bridges carry traffic in two same-direction lanes, and modeling the traffic loading on such bridges has been the subject of numerous studies. Different assumptions have been used to model multiple-presence loading events, particularly those featuring one truck in each lane. Using a database of weigh-in-motion measurements collected at two European sites for over 1 million trucks, this paper examines the relationships between adjacent vehicles in both lanes in terms of vehicle weights, speeds and inter-vehicle gaps. It is shown that there are various patterns of correlation, some of which are significant for bridge loading. A novel approach to the Monte Carlo simulation of such traffic is presented which is relatively simple to apply. This is a form of smoothed bootstrap in which kernel functions are used to add randomness to measured traffic scenarios. It is shown that it gives a better fit to the measured data than models which assume no correlation. Results are presented from long-run simulations of traffic using the different models and these show that correlation may account for an increase of up to 8% in lifetime maximum loading.||Funding Details:||Other funder||Type of material:||Journal Article||Publisher:||Elsevier||Copyright (published version):||2011 Elsevier Ltd. All rights reserved.||Keywords:||Bridge;Traffic loading;Monte Carlo simulation;Bootstrap;Kernel density estimators;Correlation||Subject LCSH:||Bridges--Live loads--Computer simulation
Monte Carlo method
|DOI:||10.1016/j.strusafe.2011.04.004||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Urban Institute Ireland Research Collection|
Critical Infrastructure Group Research Collection
Earth Institute Research Collection
Civil Engineering Research Collection
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