Type

Conference Proceedings

Authors

Eugene J. OBrien
Bernard Enright
Eugene J. O'Brien

Subjects

Engineering

Topics
structural engineering civil engineering kernel density estimators traffic loading weigh in motion highway bridges site specific bridge monte carlo simulation

Site Specific Modelling of Traffic Loading on Highway Bridges (2010)

Abstract Accurate traffic loading models based on measured weigh-in-motion (WIM) data are essential for the accurate assessment of existing bridges. Much work has been published on the Monte Carlo simulation of single lanes of heavy vehicle traffic, and this can easily be extended to model the loading on bridges with two streams of traffic in opposing directions. However, a typical highway bridge will have multiple lanes in the same direction, and various types of correlation are evident in measured traffic, such as groups of very heavy vehicles travelling together and heavy vehicles being overtaken by lighter ones. These traffic patterns affect the probability and magnitude of “multiple presence” loading events on bridges, and are significant for maximum lifetime.This paper analyses traffic patterns using multi-lane WIM data collected at four European sites. It describes an approach to the Monte Carlo simulation of this traffic which seeks to replicate the observed patterns of vehicle weights, vehicle gaps and speeds by applying variable bandwidth kernel density estimators to empirical traffic patterns. This allows the observed correlation structure to be accurately simulated but also allows for unobserved patterns to be simulated. The process has been optimised so as to make it possible to simulate traffic loading on bridges over periods of 1,000 years or more, and this removes much of the variability associated with estimating characteristic maximum load effects. The results show that the patterns of correlation in the observed traffic have a small but significant effect on bridge loading.
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Ireland -> University College Dublin -> Civil Engineering Research Collection
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Ireland -> University College Dublin -> School of Civil Engineering

Full list of authors on original publication

Eugene J. OBrien, Bernard Enright, Eugene J. O'Brien

Experts in our system

1
Eugene J. OBrien
Dublin Institute of Technology
Total Publications: 24
 
2
Bernard Enright
University College Dublin
Total Publications: 39
 
3
Eugene J. O'Brien
University College Dublin
Total Publications: 192