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Long-span bridge traffic loading based on multi-lane traffic micro-simulation
Highlights Multi-lane traffic micro-simulation is used to find the total load on two long-span bridges. Different types of congestion patterns and traffic compositions are considered. Lane change activity and subsequent formation of truck platoons are analysed. In some cases slow-moving traffic may result in greater loading than full-stop conditions. Critical bridge loading events may happen also at low inflows.
Abstract Long-span bridge traffic loading is governed by congestion. Although congestion can take various forms, most previous studies consider only a queue of vehicles. In this paper, traffic micro-simulation is used to generate several congested traffic scenarios on a two-lane same-direction roadway passing over two long-span bridges. To this end, an acknowledged car-following model is coupled with a lane-changing model. Different traffic compositions and several congestion patterns are analysed in relation to their traffic features and influence on bridge loading. It is found that: (a) slow-moving traffic may be as critical as the full-stop condition, depending on the span length; (b) critical long in-lane truck platoons form mainly at moderate inflows, typically occurring outside of rush hours; (c) the truck distribution between lanes has a limited effect on the total loading; (d) the presence of cars has a strong indirect influence on loading through their interaction with trucks. The methodology and the findings have relevance for computing a more accurate traffic loading for long-span bridges.
Long-span bridge traffic loading based on multi-lane traffic micro-simulation
Highlights Multi-lane traffic micro-simulation is used to find the total load on two long-span bridges. Different types of congestion patterns and traffic compositions are considered. Lane change activity and subsequent formation of truck platoons are analysed. In some cases slow-moving traffic may result in greater loading than full-stop conditions. Critical bridge loading events may happen also at low inflows.
Abstract Long-span bridge traffic loading is governed by congestion. Although congestion can take various forms, most previous studies consider only a queue of vehicles. In this paper, traffic micro-simulation is used to generate several congested traffic scenarios on a two-lane same-direction roadway passing over two long-span bridges. To this end, an acknowledged car-following model is coupled with a lane-changing model. Different traffic compositions and several congestion patterns are analysed in relation to their traffic features and influence on bridge loading. It is found that: (a) slow-moving traffic may be as critical as the full-stop condition, depending on the span length; (b) critical long in-lane truck platoons form mainly at moderate inflows, typically occurring outside of rush hours; (c) the truck distribution between lanes has a limited effect on the total loading; (d) the presence of cars has a strong indirect influence on loading through their interaction with trucks. The methodology and the findings have relevance for computing a more accurate traffic loading for long-span bridges.
Long-span bridge traffic loading based on multi-lane traffic micro-simulation
Caprani, Colin C. (author) / OBrien, Eugene J. (author) / Lipari, Alessandro (author)
Engineering Structures ; 115 ; 207-219
2016-01-25
13 pages
Article (Journal)
Electronic Resource
English
Micro-simulation modelling of traffic loading on medium- and long-span road bridges
| British Library Conference Proceedings | 2008