Type

Journal Article

Authors

Eugene J. O'Brien
Paraic Rattigan
Arturo González
Colin C. Caprani

Subjects

Mathematics

Topics
statistics traffic bridges live loads mathematical models probabilistic bridge loading extreme value theory modelling loads mechanics mathematical models

Assessment dynamic ratio for traffic loading on highway bridges (2011)

Abstract The determination of characteristic bridge load effect is a complex problem. Usually,statistical extrapolation of simulated static load effects is used to derive a lifetimecharacteristic static load effect. However, when a vehicle crosses a bridge, dynamicinteraction occurs which often causes a greater total load effect. This total load effect isrelated to the static load effect through a dynamic amplification factor (DAF).Specifications often recommend a conservative level for DAF, based on bridge length,number of lanes, and type of load effect only. Therefore significant improvements in theaccuracy of this calculation are possible if a DAF, specific to the considered bridge, isapplied. In this paper, the authors develop a novel method that considers site-specificbridge and traffic load conditions and allows for the reduced probability of both highstatic loading and high dynamic interaction occurring simultaneously. This approachutilises multivariate extreme value theory, in conjunction with static simulations andfinite element vehicle-bridge dynamic interaction models. It is found that the dynamicallowance for the sample bridge and traffic considered, is significantly less thanrecommended by bridge codes. This finding can have significant implications for theassessment of existing bridge stock.
Collections Ireland -> University College Dublin -> Urban Institute Ireland Research Collection
Ireland -> University College Dublin -> Critical Infrastructure Group Research Collection
Ireland -> University College Dublin -> Institutes and Centres
Ireland -> University College Dublin -> Urban Institute Ireland
Ireland -> University College Dublin -> Interdisciplinary Centres & Research Groups
Ireland -> University College Dublin -> Civil Engineering Research Collection
Ireland -> University College Dublin -> College of Engineering & Architecture
Ireland -> University College Dublin -> Critical Infrastructure Group
Ireland -> University College Dublin -> School of Civil Engineering

Full list of authors on original publication

Eugene J. O'Brien, Paraic Rattigan, Arturo González, Colin C. Caprani

Experts in our system

1
Eugene J. O'Brien
University College Dublin
Total Publications: 192
 
2
Arturo González
University College Dublin
Total Publications: 106
 
3
Colin C. Caprani
University College Dublin
Total Publications: 42