Monitoring the static and dynamic behaviour of structures and buildings has been always a topic
of great relevance, due to the impact that these structures have on the landscape where they have
been built. The actual responses of structures may differ from the initial values computed at the
design state for several reasons, such as: assumptions made in structural modelling and analysis,
differences between the design proposed and the built structure, the unpredictable and changing
nature of loads. The last reason would be the environmental factor, as the presence of winds,
ice and rain could make differences as well. Furthermore, fatigue caused by frequent wind
loads or aggressive changes of temperature over an extended period of time could cause
variations both in materials and in its structural properties. Therefore, constant monitoring of the
structural response is needed to secure and preserve the safety of existing structures and
buildings.