Dynamic Load Tests on Non-Conventional Footbridges
| Author(s): |
Peter Tanner
Juan Luis Bellod David Sanz |
|---|---|
| Medium: | conference paper |
| Language(s): | English |
| Conference: | 4th International Conference Footbridge 2011, Wroclaw, Poland, 6-8 July 2011 |
| Published in: | Footbridge 2011 |
| Year: | 2011 |
| Abstract: | Dynamic effects often predominate in footbridge conceptual design, particularly in lightweight and slender systems. Both wind and pedestrians transmit dynamic forces to the structure and may induce vibrations, thus generating user comfortrelated issues or even fatigue resistance or structural safety problems. It is therefore important to predict the effect of dynamic actions during the design stage. Since vibration amplitude and frequency depend on a substantial number of parameters, dynamic analysis and computer modelling are subject to important uncertainties, especially as regards footbridges with non-conventional structural systems. Furthermore, the establishment of performance requirements based on a general definition of comfort, as is the case in most current codes and standards, is inadequate and may stifle innovative design because many bridges may fail to meet such requirements. A procedure was therefore deployed in the design and construction of a series of non-standard footbridges, integrating theoretical and experimental verification of their dynamic structural behaviour to ensure suitable user comfort levels. |
| Keywords: |
acceleration slenderness comfort uncertainties evaluation damping vibration dynamic load tests innovative footbridges performance requirement
|
| License: | This creative work is copyrighted. The copyright holder(s) do(es) not grant any usage rights other than viewing and downloading the work for personal use. Further copying or publication requires the permission of the copyright holder(s). |
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25/10/2016 - Last updated on:
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