Effects of a Moving Load on a Nonhomogeneous Bridge Beam
The understanding of the dynamic response of a beam under a moving load is an active research area in structural engineering. The aim of this note is to investigate such a response for piecewise constant beams that display wave filtering properties associated with band gaps. The performance of five simply supported nonhomogenous piecewise constant beams under concentrated load traveling at ten different constant speeds was analyzed and compared with that of a simply supported homogenous beam with the same volume. The nonhomogenous beam design and the speed range were based on the band gap theory for which traveling waves in a specific range of frequencies cannot propagate for a given piecewise geometry. The investigation has been carried out through analytical and numerical approaches by implementing equations in a MATLAB script and using the finite elements software, LUSAS, respectively. Factors such as number of vibration modes and damping effect were also considered. It was concluded that i) higher speeds do not necessarily generate a more severe beam response; ii) some of the investigated nonhomogenous beams exhibit good performance for a range of speeds that corresponds to the lower interval of the band gap range.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784481561
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Supplemental Notes:
- © 2018 American Society of Civil Engineers.
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Al Mutairi, M S
- Stankowski, L
- Rodrigo, C Rodriguez
- Gei, M
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Conference:
- International Conference on Transportation and Development 2018
- Location: Pittsburgh Pennsylvania, United States
- Date: 2018-7-15 to 2018-7-18
- Publication Date: 2018
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 353-362
- Monograph Title: International Conference on Transportation and Development 2018: Planning, Sustainability, and Infrastructure Systems
Subject/Index Terms
- TRT Terms: Beams; Bridge members; Finite element method; Live loads; Speed
- Identifier Terms: MATLAB (Computer program)
- Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation;
Filing Info
- Accession Number: 01858728
- Record Type: Publication
- ISBN: 9780784481561
- Files: TRIS, ASCE
- Created Date: Sep 23 2022 1:14PM