Recording and Rehabilitation Procedures for Historic Masonry Buildings: Fid-Bau Portal

Recording and Rehabilitation Procedures for Historic Masonry Buildings

Chalioris, Constantin E. / Tsioukas, Vassilios E. / Karayannis, Chris G.

The use of photogrammetric surveys for the recording of the structural system status for historic masonry buildings is a new and sound tool for in-depth pathology understanding and rehabilitation decision-making. In this study, the structural system of two historic masonry buildings is investigated based on the recording data obtained via photogrammetry. The first one is a four-storey traditional tobacco warehouse of the late 19th century in Alexandroupolis, Northern Greece, which has been partially collapsed in 2005 and constituted an extremely dangerous working environment. Therefore, the photogrammetric recording was the only really accurate and safe in situ measurement procedure of the existing damaged structural system of the building. The second one is an old customs house located in the old historic town of Nafplio, Southern Greece, and specifically in front of the central part of the port. It was built around the middle of the 19th century by the well-known Architect S. Kleanthis. Its architectural, structural and morphological characteristics along with its artistic details have been excellently brought out through the advanced method of photogrammetry. Simultaneously, this detailed display of the structural system pointed out its pathology. This way, all the necessary information for the presented structures have been acquired with an appropriate accuracy in order to assist the Engineer to choose the proper repairing and strengthening techniques for the renovation and the re-use of these historic buildings; finally proposed rehabilitation techniques are also presented. The recording procedure used, combines the conventional topographic surveys and the photogrammetric image processing for the formation of all the façades’ orthoimages. The orthoimages were used as background information to digitize details of the buildings façades in a CAD environment. The Photomodeler software and the freeware application Hugin has been used to create respectively a detailed 3D model and an interactive panorama file of the buildings. A proper intervention plan is presented and commented for each building.