Ambient Vibration Monitoring






Preface

The development of methods for the monitoring and assessment of structures

was driven by the demand for better as well as cheaper methods. Constraints

like undisturbed traffic flow, limited access possibilities and finally limited or

even shrinking budgets have led to a development to an assessment model well

fitted to the construction sector. Ambient vibration means that the input is not

fully known, leaving, as always, a margin of uncertainty. If we accept that these

new technologies will in certain cases not provide exact or acceptable answers

our expectations on the outcome will be fulfilled. It also has to be considered

that this early development has explored only a minor portion of its entire

technical range, leaving much still to do. It is most likely that the one or the

other of the current approaches will be overruled by future research work.

Nevertheless the conception proposed for data acquisition has been made in

order to support any new technological development in the next 50 years.

Even if the methodology changes, the old data will still be usable for the

new assessment routines. These facts imply that further research work should

be put into this subject. The sheer number of researchers working in this

field makes us optimistic that in 10 years time a complete revision of this book

will be due.


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