Type

Conference Proceedings

Authors

Eugene J. O'Brien
Colin C. Caprani
Alessandro Lipari

Subjects

Engineering

Topics
bridges traffic load traffic long span bridges long span load effect microsimulation

Load effect of single-lane traffic simulations on long-span bridges (2010)

Abstract It is well acknowledged that long-span road bridges (about 50 m long and more) aregoverned by congestion traffic rather than free-flow conditions. A conventional modelfor the design of new long-span bridges is to place over the bridge a load modelrepresenting a platoon of heavy vehicle with the gaps between them reduced to aminimum. This assumption is too conservative for existing bridges, given the largedisruption costs faced by their closure for rehabilitation. In order to model the closegaps between vehicles, characteristic of congested traffic, microsimulation is neededto accurately capture drivers’ behaviour. In this work, a microsimulation model isstudied and found to replicate many different known forms of congestion. As a firstapproach to the topic, single-lane simulations of identical vehicles have been carriedout in order to obtain load effect on a sample bridge. This load effect is studied withreference to the form of traffic causing the load effect. It is found that the mostextreme load effect may not be caused by purely congested traffic but also by non-stationary congested conditions
Collections Ireland -> University College Dublin -> Civil Engineering Research Collection
Ireland -> University College Dublin -> College of Engineering & Architecture
Ireland -> University College Dublin -> School of Civil Engineering

Full list of authors on original publication

Eugene J. O'Brien, Colin C. Caprani, Alessandro Lipari

Experts in our system

1
Eugene J. O'Brien
University College Dublin
Total Publications: 192
 
2
Colin C. Caprani
University College Dublin
Total Publications: 42
 
3
Alessandro Lipari
University College Dublin
Total Publications: 8