Abstract
For the purpose of developing a precise parameter identification procedure for bridge cables using measured multiple-mode parameters, a systematic investigation on the modal properties of cables is first carded out by using a three-dimensional finite element formulation taking into account the cable flexural rigidity, sag-extensibility, and non-constant dynamic tension force. The dimensionless frequencies are evaluated for free vibration of cables with their parameters lying in a wide range covering most of the cables in existing cable-supported bridges. The relation surfaces between the dimensionless frequencies and structural parameters are obtained for both lower and higher modes. Based on the systematic analysis of cable modal properties, a nonlinear least-squares method is then adopted to evaluate cable tension force by use of measured multiple-mode frequencies. The statistical processing method of identified cable tension forces under different noise levels is addressed. The importance and effect of specific high-order frequencies on the identification accuracy are discussed. It is expected that after some further extension, the proposed procedure can serve as a tool for evaluating cable tension force with high accuracy and reliability.
Original language | English |
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Pages (from-to) | 511-522 |
Number of pages | 12 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 4330 |
DOIs | |
Publication status | Published - 1 Jan 2001 |
Event | Smart Systems for Bridges, Structures, and Highways-Smart Structures and Materials 2001- - Newport Beach, CA, United States Duration: 5 Mar 2001 → 7 Mar 2001 |
Keywords
- Bridge cable
- Multimode approach
- Parameter identification
- Tension force evaluation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering