Monitoring and model updating of an FRP pedestrian truss bridge

G. Hayashi, Chul Woo Kim, Y. Suzuki, K. Sugiura, Patrick McGetrick, H. Hibi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

This paper presents the results of a real bridge field experiment, carried out on a fiber reinforced polymer (FRP) pedestrian truss bridge of which nodes are reinforced with stainless steel plates. The aim of this paper is to identify the dynamic parameters of this bridge by using both conventional techniques and a model updating algorithm. In the field experiment, the bridge was instrumented with accelerometers at a number of locations on the bridge deck, recording both vertical and transverse vibrations. It was excited via jump tests at particular locations along its span and the resulting acceleration signals are used to identify dynamic parameters, such as the bridge mode shape, natural frequency and damping constant. Pedestrianinduced vibrations are also measured and utilized to identify dynamic parameters of the bridge. For a complete analysis of the bridge, a numerical model of the FRP bridge is created whose properties are calibrated utilizing a model updating algorithm. Comparable frequencies and mode shapes to those from the experiment were obtained by the FE models considering the reinforcement by increasing elastic modulus at every node of the bridge by stainless steel plate. Moreover, considering boundary conditions at both ends as fixed in the model resulted in modal properties comparable/similar to those from the experiment. This study also demonstrated that the effect of reinforcement and boundary conditions must be properly considered in an FE model to analyze real behavior of the FRP bridge.
Original languageEnglish
Title of host publicationLife-Cycle of Engineering Systems: Emphasis on Sustainable Civil Infrastructure: Proceedings of the Fifth International Symposium on Life-Cycle Civil Engineering (IALCCE 2016), 16-19 October 2016, Delft, The Netherlands
PublisherCRC Press
Number of pages8
ISBN (Print)9781138028470
Publication statusPublished - 05 Oct 2016
EventThe Fifth International Symposium on Life-Cycle Civil Engineering (IALCCE 2016) - TU Delft Aula Congress Centre, Delft, Netherlands
Duration: 16 Oct 201619 Oct 2016
http://www.ialcce2016.org/

Conference

ConferenceThe Fifth International Symposium on Life-Cycle Civil Engineering (IALCCE 2016)
Abbreviated titleIALCCE 2016
CountryNetherlands
CityDelft
Period16/10/201619/10/2016
Internet address

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