Moving towards a new life cycle analysis approach by implementing low cost structural 3d monitoring of historic building safety by means of image based modelling.

Abstract A building’s structural safety is often remit to human life fatalities and the measures of social protection and security often used following the collapse of a portion of the building. It is quite clear that, if it were possible to monitor the increase of static deterioration, it would be easier to prevent the collapse. There are two fundamental aspects closely linked to the building’s collapse: the first concerns the security of lives and the second concerns the well-being and quality of life when it is considered in relation to Cultural Heritage survival. Unfortunately, the high cost of a 3D survey does not usually permit a constant monitoring of the visible instability. The paper aims to carry out a low-cost workflow for structural 3D monitoring of historical buildings based on Image Based Modeling (IBM) techniques. IBM techniques create a 3D model of the sample by taking a structured dataset of images according to photogrammetric rules. In recent years, the experimentation of several research teams demonstrated the affordability of these techniques, which are able to ascertain data with accuracy within a millimeter (according to the size of the sample and the camera resolution).