MECHANISMS OF DAMPING
Bridges subjected to dynamic testing have commonly shown relatively small variation of damping (expressed as the effective instantaneous logarithmic decrement) with amplitude. This is clearly closer to the theoretical solution for viscous or idealised hysteretic damping than to the solution of the classic simple friction-damped system. Nevertherless, the magnitude of the observed damping is such that in many cases friction must make a major contribution to the dissipation of the energy of oscillation. Some indication is given of the possible magnitude of hysteretic effects, including cases where an apparently hysteretic behaviour arises although the actual dissipative mechanism is frictional. To assist understanding of the way practical factors modify the classic friction damping model, the results are presented of an extended analysis of the effect of friction in more complex system. /Author/
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Supplemental Notes:
- Proceeding of a Symposium of Dynamic Behavior of Bridges at the Transpor and Road Research Laboratory, Crowthorne, Berkshire, England, May 19, 1977.
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Corporate Authors:
Transport and Road Research Laboratory (TRRL)
Wokingham, Berkshire United Kingdom -
Authors:
- WYATT, T A
- Conference:
- Publication Date: 1977-5-19
Media Info
- Features: Figures; References;
- Pagination: p. 10-21
Subject/Index Terms
- TRT Terms: Bridges; Damping (Physics); Dynamic tests; Energy; Friction; Hysteresis; Mathematical models; Oscillation
- Uncontrolled Terms: Models
- Old TRIS Terms: End movements
- Subject Areas: Bridges and other structures; Energy; Highways;
Filing Info
- Accession Number: 00172167
- Record Type: Publication
- Report/Paper Numbers: TRRL Rpt. 275 Proceeding
- Files: TRIS
- Created Date: Apr 12 1978 12:00AM