Evolution of Stay Cable Monitoring Using Ambient Vibration

Autor(en):	Roman Geier
Medium:	Tagungsbeitrag
Sprache(n):	Englisch
Tagung:	IABSE Symposium: Metropolitan Habitats and Infrastructure, Shanghai, China, 22-24 September 2004
Veröffentlicht in:	IABSE Symposium Shanghai 2004
Seite(n):	468-469
Jahr:	2004
DOI:	10.2749/222137804796302815
Abstrakt:	Within the scope of design as well as during the subsequent required maintenance of bridge structures engineers are frequently confronted with stay cables. On the one hand because cable-stayed bridges are increasingly designed and built due to their aesthetic appearance and on the other hand because the most-sensitive load carrying elements of such structures - the ropes and cables - are very difficult to check on their condition and on the current cable force. Moreover undesirable vibration excitation by aerodynamic and resonance effects is a decisive criterion to maintain serviceability and ultimate limit state of the structure. For this reason efficient, non-destructive testing and assessment technologies are required without using complicated lift-off tests. The main subject of this paper is to present recent technologies which determine the cable force and the current condition of stay cables, accurately.
Stichwörter:	Schrägkabel Eigenfrequenz Seilkraft

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