Ambient Data to Analyse the Dynamic Behaviour of Bridges: A First Comparison between Different Techniques

The dynamic analysis of Queensborough bridge data recorded by EDI Ltd., based in Vancouver (Canada), under environmental excitation, is a chance to involve a few different research groups already working in this field. Three different research units have employed alternatives methodologies to investigate and analyse the bridge data. With a complete agreement, they decided to compar the results of these analysis looking for a reliable common methodology. The aim of the present paper is a sort of resume of different techniques, together with their advantages and drawbacks, and a comparison of the results obtained via these techniques in order to select the most reliable aspects and to merge them for creating a common strategy of approaching the bridge monitoring matter. All this, seeking to define an optimum standard methodology to be proposed to those institutions and maintenance companies daily operating in this field.