Abstract
Abstract. The paper presents preliminary findings from a research study designed to assess the health status of a medieval bridge built on 1500 under the Medici dynasty over the river Sieve, close to Florence. The structure, a two span stone bridge with a main central pillar, experienced some restructuring interventions from 1555 to the present. The left span has been closed for some decades, and for many years the water has been allowed to float under it in case of severe flood only. At the beginning of year 2000 the left span has been opened to the regular flux of water. After opening, a maelstrom has been noticed as permanently present at the main pier’s basis highlighting the presence of a fracture in the concrete base around the central pile of the bridge. In order to investigate structural health and to assess bridge’s stability structural inspections and hydraulic surveys have been carried out. This manuscript reports Terrestrial Laser Scanning (TLS) survey results. Surface comparisons to identify anomalies and defromations have been carried out by exploiting Two TLS campaigns that were performed within a 6 years time span.
Highlights
1.1 Applying 3D technologies to Cultural Heritages (CH)In the latest years, the development of 3D technologies applied to the CH field has led to results of utmost importance from the point of view of preservation, development, communication and fruition of our assets (Bitelli, 2017)
The 3D modelling of Cultural Heritage is mainly based on digital techniques to produce complete three-dimensional surveys (Tucci, 2011)
The case study reported in this paper, is an effective example of Terrestrial Laser Scanning (TLS) application, which among others, permits to compare geometric settings within a several years time span; and can be considered as a long period structural health monitoring
Summary
The development of 3D technologies applied to the CH field has led to results of utmost importance from the point of view of preservation, development, communication and fruition of our assets (Bitelli, 2017). The 3D modelling of Cultural Heritage is mainly based on digital techniques to produce complete three-dimensional surveys (Tucci, 2011). Laser scanner data availability is increasing rapidly, the attention and interest for technical application is growing in the same way. Most advanced 3D models, which mainly consist of point-cloud data, are strongly exploited by engineers, both for research and industrial purposes. The case study reported in this paper, is an effective example of Terrestrial Laser Scanning (TLS) application, which among others, permits to compare geometric settings within a several years time span; and can be considered as a long period structural health monitoring
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