Load effect of single-lane traffic simulations on long-span bridges

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Title: Load effect of single-lane traffic simulations on long-span bridges
Authors: Lipari, Alessandro
Caprani, Colin C.
O'Brien, Eugene J.
Permanent link: http://hdl.handle.net/10197/4143
Date: 2010
Abstract: It is well acknowledged that long-span road bridges (about 50 m long and more) are governed by congestion traffic rather than free-flow conditions. A conventional model for the design of new long-span bridges is to place over the bridge a load model representing a platoon of heavy vehicle with the gaps between them reduced to a minimum. This assumption is too conservative for existing bridges, given the large disruption costs faced by their closure for rehabilitation. In order to model the close gaps between vehicles, characteristic of congested traffic, microsimulation is needed to accurately capture drivers’ behaviour. In this work, a microsimulation model is studied and found to replicate many different known forms of congestion. As a first approach to the topic, single-lane simulations of identical vehicles have been carried out in order to obtain load effect on a sample bridge. This load effect is studied with reference to the form of traffic causing the load effect. It is found that the most extreme load effect may not be caused by purely congested traffic but also by non-stationary congested conditions
Type of material: Conference Publication
Publisher: BCRI
Copyright (published version): 2010, BCRI
Keywords: BridgesLoadingLong-spanMicrosimulationTraffic
Language: en
Status of Item: Not peer reviewed
Is part of: N.A. Ni Nualláin, D. Walsh, R. West, E. Cannon, C.Caprani, B.McCabe (eds.). Bridge & Infrastructure Research in Ireland 2010
Conference Details: Bridge & Infrastructure Research in Ireland 2010, Cork Institute of Technology, 2010
Appears in Collections:Civil Engineering Research Collection

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