Direct measurement of dynamics in road bridges using a bridge weigh-in-motion system
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|Title:||Direct measurement of dynamics in road bridges using a bridge weigh-in-motion system||Authors:||O'Brien, Eugene J.
|Permanent link:||http://hdl.handle.net/10197/6239||Date:||Dec-2013||Abstract:||A method is presented of measuring a bridge’s characteristic allowance for dynamic interaction in the form of Assessment Dynamic Ratio. Using a Bridge Weigh-in-Motion system, measurements were taken at a bridge in Slovenia over 58 days. From the total observed traffic population, 5-axle trucks were extracted and studied. The Bridge Weigh-in-Motion system inferred the static weights of the trucks, giving each measured event’s dynamic increment of load. Theoretical simulations were carried out using a 3-dimensional vehicle model coupled with a bridge plate model, simulating a traffic population similar to the population measured at the site. These theoretical simulations varied those properties of the 5-axle fleet that influence the dynamic response; simulating multiple sets of total (dynamic + static) responses for a single measured static strain response. Extrapolating the results of these theoretical simulations to a 50-year Assessment Dynamic Ratio gives similar results to those obtained by extrapolating the data measured using the Bridge Weigh-in-Motion system. A study of the effect of Bridge Weigh-in-Motion system errors on the predictions of Assessment Dynamic Ratio is conducted, identifying a trend in the Bridge Weigh-in-Motion calculations of maximum static response. The result of this bias is in turn quantified in the context of predicting characteristic maximum total load effect.||Funding Details:||European Commission||Type of material:||Journal Article||Publisher:||Technika. Vilnius Gediminas Technical University||Keywords:||Bridge;Dynamics;Assessment dynamic ratio;Soft load testing;Vehicle bridge interaction;Weigh-in-motion;ADR;VBI;WIM;Characteristic||DOI:||10.3846/bjrbe.2013.34||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Civil Engineering Research Collection|
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