THE CHURCH OF SANT'ANDREA IN BERGAMO: AN INTEGRATED SURVEY FOR KNOWLEDGE AND CONSERVATION

Abstract. The church dedicated to Sant'Andrea (St. Andrew) in Porta Dipinta street in Bergamo city is a treasure that keep inside it a rich heritage of great historical and cultural value, both from the architectural and from the artistic point of view. Lacking of the façade (left unfinished), it is often neglected, despite being on the main road leading to the old town from Sant'Agostino Gate. The approach to an historical building like this requires a multi-disciplinary integration, in order to join the technical competence of engineering sciences to the sensitivity of human and fine arts sciences. For a better understanding of the structural performances of the building, historical research, measurement survey, material and decay condition study have to complement each other.</p

THE INTEGRATED 3D SURVEY FOR PLANNED CONSERVATION: THE FORMER CHURCH AND CONVENT OF SANT'AGOSTINO IN BERGAMO

Time effects and human offenses threaten cultural heritage. The constant observation and periodic maintenance activities are the most suitable safeguarding solution: they can limit risk situations and facilitate interventions. Today, planned conservation is thus the best pattern to preserve the monuments as focused on small preventive restoration: actions organized and structured according to steady and regular monitoring. The preliminary survey, the interpretation of metric and material data and the subsequent verification of the evolution of instability and degradation phenomena based on a comparison with previous information, is a long and expensive activity if carried out by traditional systems. Otherwise, 3D laser scanning and image-based reconstruction methodologies &ndash; if properly applied within optimized operational practices &ndash; can allow both the systematic control of assets’ conditions and the evaluation of their health status and decay problems in a short time and with lower costs. This paper intends to show the validity of such an innovative methodology through a case study applied to the former church and convent of Sant'Agostino (St. Augustine) in Bergamo

UAV PHOTOGRAMMETRY FOR CULTURAL HERITAGE PRESERVATION MODELING AND MAPPING VENETIAN WALLS OF BERGAMO

In July 2017, the system of Bergamo City Walls was registered in the UNESCO World Heritage List, together with other Venetian fortresses in Italy, Croatia and Montenegro. This important historical document needs continuous care and caution in order to be preserved complete, despite the continuous atmospheric and anthropic attacks, giving rise to dangerous deterioration processes on the artefact. The UAV photogrammetry is a suitable surveying method for such an extended system, able to collect all the geometrical, material and deterioration information needed for an effective maintenance program, also quick enough to allow for a repeated monitoring of the entire wall circuit. This paper presents the UAV survey campaign planned, and partially already completed, in order to test the methodological choices and solve all the operational difficulties to use drones in an urban environment, mainly because short distance shooting of nearly vertical surfaces was required

PRESERVING THE VENETIAN FORTRESS OF BERGAMO: QUICK PHOTOGRAMMETRIC SURVEY FOR CONSERVATION PLANNING

The historical and cultural relevance of the City Walls built by the ‘Serenissima’ Republic of Venice in the second half of 16th century was recognized in 2017 by the insertion of Bergamo, together with other Venetian Fortresses in Italy, Croatia and Montenegro, in the World Heritage List of UNESCO as transnational site. In the framework of the nomination to the WHL, the City Council together with the University of Bergamo started a campaign of studies and surveys aimed to prepare a conservation planning. The goal of this plan is to assure a constant monitoring of this artwork, so that a strict routine of controls, cleaning and small strengthening works would prevent more relevant interventions, which could corrupt the material integrity of the building.This paper delineates the methodological and operational workflow applied to the preparation of the maintenance plan, now in progress, for the Venetian City Walls of Bergamo, where the photogrammetric survey by means of UAV plays an important role. The different working phases, the adopted instrumentation, the difficulties encountered and the choices made are described, and some case studies are also illustrated that represent well the typical problems encountered for the conservation of the Walls.</p

INTEGRATED SURVEY TECHNIQUES: PRELIMINARY STUDIES FOR THE CONSERVATION OF VILLA GALVAGNINA

On May 20, 2012, an earthquake of magnitude ML&thinsp;=&thinsp;5.9 hit a vast area of the Po Valley, in the territory across Lombardia, Veneto and Emilia, with the epicentre close to Finale Emilia. The seismic event, unusually intense for the area, caused extensive damage to the built heritage, so that six years later many buildings are still waiting for the necessary restoration works. One of them is the Villa Galvagnina in Moglia, in the province of Mantua.The damages caused by the earthquake made necessary emergency strengthening works. Alongside these emergency measures, the Local Office of the Ministry of Culture considered suitable to start more detailed studies on this neglected asset.The present study is part of the Superintendence initiatives, concerning the mapping of the building materials, a survey about murals’ decay, as well as the damage and crack patterns. The aim of this data acquisition campaign is to identify the main risk factors for the preservation of the villa and to identify possible strategies for the strengthening and conservation works. The article critically presents the working method adopted for the survey setting up. The data acquisition steps, the difficulties experienced, and the choices made are fully described and some preliminary considerations are also expressed on the main damage suffered by the villa and on the ongoing deterioration.</p

Distinct Element analysis of stone arches

Sinopoli ed. Balkema, Rotterdam

Prove sperimentali speditive e valutazioni di vulnerabilità delle murature

Il contributo descrive le modalità di studio, le prove eseguite e i risultati della campagna di ricerca su edifici danneggiati da sisma a Nocera Umbra, realizzata a seguito di convenzione tra Ministero per i Beni e le Attività Culturali- Istituto Centrale per il Restauro e Università IUAV di Venezia, responsabili scientifici Francesco Doglioni e Giulio Mirabella Roberti

Numerical modeling of shear bond tests on small brick-masonry assemblages

An experimental and numerical investigation has been carried out in Milan for the characterisation of the materials of a two storey, full-scale, brick masonry building prototype set up at the University of Pavia. Among other tests, shear bond tests have been carried out on triplets. The displacements in the vertical and horizontal directions have been carefully measured on bricks and mortar joints under different normal stress levels. For the numerical interpretation of the material behaviour, a Mohr-Coulomb type failure envelope, calibrated on the experimental results, was applied to the brick/mortar interfaces of. a FE model in plane stress conditions. Contact elements with finite sliding capacities under large displacements have been used to model the test