Effect of Single-Lane Congestions on Long-Span Bridge Traffic Loading

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Title: Effect of Single-Lane Congestions on Long-Span Bridge Traffic Loading
Authors: O'Brien, Eugene J.
Lipari, Alessandro
Caprani, Colin C.
Permanent link: http://hdl.handle.net/10197/7012
Date: 7-Sep-2012
Abstract: It is well known that traffic loading of long-span bridges is governed by congestion. In spite of the fact that field observations in the past decades have shown that congestion can take up different forms, most previous studies on bridge traffic loading consider only a queue of standstill vehicles. In this paper, a micro-simulation tool is used for generating congested traffic on a single-lane roadway. The underlying micro-simulation model has been found capable of successfully replicating observed congestion patterns on motorways by simulating single-lane traffic with identical vehicles. Here trucks are introduced into the model, in an investigation of the total load for a 200m span bridge. Different congestion patterns are found and studied in relation to their effect on loading. It is found that the bumper-to-bumper queue is not necessarily the most critical situation for the sample long-span bridge, since it does not allow the flowing of vehicles and therefore decreases the probability of observing critical loading events. Slow-moving traffic, corresponding to heavy congestion, can be more critical, depending on the truck proportion.
Funding Details: European Commission - Seventh Framework Programme (FP7)
Type of material: Conference Publication
Copyright (published version): 2012 the Authors
Keywords: Traffic;Load;Loading;Bridge;Long-span;Long;Span;Congestion;Lane;Micro-simulation
Language: en
Status of Item: Peer reviewed
Conference Details: Bridge and Concrete Research in Ireland, Dublin, Ireland, 6 - 7 September, 2012
Appears in Collections:Civil Engineering Research Collection

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