Vibration control coupled with new numerical approaches for a rapid safety assessment

 

State of the art

 

Structural Building Monitoring (SM) is typically employed to monitor and to prevent any damage in high sensitive structures (historical building, bridges, dams, etc.) during renovation processes and/or in high risk areas in which catastrophic events such as earthquakes, flood, etc. can occur. Construction activity results in varying degrees of ground vibration which spread through the ground up to buildings located close to the worksite. In case of historical buildings these vibrations may damage their structural or non-structural elements. Vibration should be assessed in cases where there is a significant potential for impact from construction activities such as drillings. Thus, connected to ground drilling operation, SM may help to prevent any damage to structural and non-structural elements such as crack opening which may damage any artwork in it. In this sense, SM represents a sort of insurance against damage, which constructors and/or owners may apply in pre-, during- and post-construction operations such as drillings.

 

The process allowing to know the health and safety of a building is known as Structural Health Monitoring. It needs an initial phase in which the structure is monitored by proper sensors to gather reliable and useful data. Such data, once gathered, is broadcasted via Wi-Fi/LAN connection to the data centre where it is finally filtered and analysed. This allows achieving a numerical model showing the current dynamic behaviour of the building. Once the model is calibrated, methodologies such as Model Order Reduction are usually employed to get a lighter and manageable numerical model, that can get linked into a BIM platform for its near-real time update and building health monitoring scopes.

 

The GEOFIT contribution

 

Within GEOFIT, project standard monitoring methodologies and risk/vulnerability assessment will be coupled with theoretical, numerical approaches to define a new reliable methodology allowing a rapid safety assessment starting from displacement measured on site coming from Ground Based Interferometric Synthetic Aperture Radar technology.

 

Technology readiness level improvement: From TRL6 to TRL7