Stay cables of Stavanger City bridge: damping estimation and mitigation of vibrations
Abstract
Bybrua was open to traffic in 1978 and it is a landmark of Stavanger. This stay-cabled bridge has occasionally experienced some large vibrations. The aim of the study is to evaluate what is the damping characteristics of the cable for the many different modes of vibrations. This will be done using different procedures such as Free Decay Response, Frequency Domain Decomposition and Random Decrement Technique. A range of external dampers will be discussed, and a preliminary analysis of a Stockbridge damper will be carried out in order to estimate what the result of placing such damper will cause in the vibration control.