ESTIMATING BRIDGE DYNAMICS USING THE WEIGH-IN-MOTION ALGORITHM
The bridge weigh-in-motion (WIM) algorithm is modified to calculate the dynamic amplitude of the bridge vibration in addition to the axle weights for any truck crossing over an instrumented bridge. The proposed method first finds dominant dynamic frequencies using a Fourier analysis of the record of an end girder that carries little static but considerable dynamic effect. The frequencies determine dynamic "influence lines" with amplitudes that are found using the minimization-of-error technique of the WIM algorithm. Preliminary results indicate that the proposed method is applicable for a large number of bridges where more traditional methods fail to predict the dynamic effects. Use of such an algorithm should facilitate the current trend of utilizing field data in evaluating the safety of existing bridges.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309047617
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1200, Pavement Management and Weigh-in-Motion.
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Authors:
- Ghosn, Michel
- Xu, Qingle
- Publication Date: 1988
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 7-14
- Monograph Title: Pavement management and weigh in motion
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Serial:
- Transportation Research Record
- Issue Number: 1200
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Algorithms; Amplitude; Bridges; Dynamic tests; Electromagnetic frequencies; Estimating; Safety; Vibration; Weigh in motion
- Uncontrolled Terms: Dynamic analysis
- Subject Areas: Bridges and other structures; Design; Highways; Safety and Human Factors; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 00490184
- Record Type: Publication
- ISBN: 0309047617
- Files: TRIS, TRB, ATRI
- Created Date: Dec 31 1989 12:00AM