Static and dynamic moments for any plane within a straight solid slab bridge caused by the crossing of a truck

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Show simple item record Mohammed, Omar González, Arturo 2017-09-07T10:10:07Z 2017 Elsevier en 2017-11-01
dc.identifier.citation Engineering Structures en
dc.identifier.issn 0141-0296
dc.description.abstract A lot of research has been carried out to explain the manner in which longitudinal moments of a bridge respond to traffic. The total longitudinal bending moment is made of 'static' and 'dynamic' components, which vary with time as a result of the inertial forces of the bridge and changes in value and point of application of the forces of the vehicle. However, there is limited evidence about how bending moments at planes other than longitudinal, or twisting moments, act in response to a moving vehicle. For the first time in the literature, this paper analyses the total resultant moments ('static' + 'dynamic') for any plane orientation (from 0 to 360°) at any location of a solid slab deck due to the crossing of a vehicle. The bridge is modelled as a simply supported straight orthotropic plate and the vehicle is modelled as a three-dimensional 5-axle articulated system composed of interconnected sprung and unsprung masses. Simulations are performed for three vehicle transverse paths and three speeds. Using Wood and Armer equations, the resultant moment at any plane orientation can be obtained from equilibrium of bending and twisting moments acting on longitudinal and transverse planes. Maximum twisting moments develop in planes at 45° with longitudinal and transverse planes. Bending moments reach maximum and minimum values at longitudinal and transverse planes. Nevertheless, the moments acting on other plane orientations cannot be ignored in order to accurately assess whether the moment capacity of the bridge provides adequate safety. Therefore, the amount of slab reinforcement will be sufficient provided that the moment capacity exceeds the applied moment for any location and plane. Critical locations with highest values of sagging, hogging and twisting are identified in the bridge, and the dynamic amplification associated to the applied moments is evaluated. Bridge codes such as the Eurocode employ a unique built-in dynamic amplification factor for moment that depends only on the bridge length and the number of lanes. This paper shows how to perform an improved assessment allowing for changes in dynamic behaviour with location and plane orientation, which may prevent needless expense in bridge rehabilitation. en
dc.language.iso en en
dc.publisher Elsevier en
dc.rights This is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Structures, 150 2017-11-01, pp.465-480. DOI: 10.1016/j.engstruct.2017.07.059 en
dc.subject Vehicle-bridge interaction en
dc.subject Bridge slab en
dc.subject Dynamic amplification factors en
dc.title Static and dynamic moments for any plane within a straight solid slab bridge caused by the crossing of a truck en
dc.type Journal Article en
dc.status Peer reviewed en
dc.identifier.volume 150 en
dc.identifier.startpage 465 en
dc.identifier.endpage 480 en
dc.identifier.doi 10.1016/j.engstruct.2017.07.059
dc.neeo.contributor Mohammed|Omar|aut|
dc.neeo.contributor González|Arturo|aut| 2019-11-01
dc.description.othersponsorship Al-Anbar University en
dc.description.othersponsorship Iraqi Ministry of Higher Education en
dc.internal.rmsid 656053912 2017-07-28T12:42:20Z
 Access to this item has been restricted by the copyright holder until: 2019-11-01

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