1,721,043 research outputs found
Shape memory alloy devices for the structural improvement of masonry heritage structures
No full textThe development of innovative techniques based on shape memory alloy devices (SMADs), for the purpose of seismic protection for cultural heritage structures, began in Italy within the framework of an European Commission-funded project and continued with further studies and applications. These devices exploit a special property of shape memory alloys: their superelasticity—the ability to recover very high deformation without residual strain, associated with a non-linear constitutive behavior, making it possible to keep the force constant in a wide range of displacements. Consequently, SMADs can be used as special ties capable of limiting the forces transmitted between the structural elements that they connect (e.g., a church facade and the roof), at the same time allowing small displacements. Compared with very rigid conventional steel ties, SMADs are able to reduce accelerations and forces, and thus increase the seismic capacity of the structure. This article provides a brief overview about the research and development that led to the world's first applications of SMADs for seismic protection, within the framework of the post-earthquake restoration of the upper basilica of St. Francis in Assisi, Italy. © Taylor & Francis Group, LLC
La protezione dei beni culturali, archivistici e mussali, da calamità naturali, eventi incidentali, bellici e terroristici
No full textThe Demo-Intervention of the ISTECH Project: The Trignano S. Giorgio Church Bell-Tower (Italy)
No full textThis document describes the rehabilitation of the Trignano S. Giorgio Church Bell-Tower (S. Martino in Rio, Reggio Emilia, Italy), in the framework of the three-years ISTECH Project activities (Development of Innovative Techniques for the Improvement of Stability of Cultural Heritage in Particular Seismic Protection), funded by the European Commission in 1996. The Bell-Tower was seriously damaged by the earthquake of October 15th 1996, which principally struck the Reggio Emilia and Modena Districts in Emilia-Romagna Region (Italy) and a rehabilitation was necessary. The intervention on the Bell-Tower applies innovative antiseismic techniques in order to fulfil the project objectives: strengthening and restoring Cultural Heritage Structures, especially masonry buildings, by the use of superelastic Shape Memory Alloy Devices
L'edificio scolastico "G. Mazza" in Torre del Greco (NA): analisi del comportamento sismico e progetto di adeguamento
No full textProgress of Application , R&D and Design Guidelines for Shape Memory Alloy Devices for Cultural Heritage Structures in Italy
No full textThe ancient timber roofing structures in Emilia-Romagna region
No full textWidespread survey, aiming at the evaluation of both vulnerability of the structures and usability of the buildings, have been carried out after the seismic events occurred on May 2012 in Emilia-Romagna districts. During the surveys, several roof typologies have been verified, which often evidenced lack in terms of earthquake-proof features. In contrast, some ancient timber roofs showed an original construction technology, according to the seismic mitigation measures. Clearly, the attention to the behaviour of the roofing structures against the horizontal actions was due to the historic memory related to earthquakes occurred in the past or simply due to a good construction practice lost during the following years. This paper it is devoted to explain the analysis campaign carried out on an ancient timber roofing structure located in the historic centre of the town of Cento (FE), aiming at the characterisation of its seismic behaviour. The study consists on three subsequent steps: 1) in-depth visual and geometrical survey; 2) in-situ non-destructive tests for preliminary material characterization; 3) Finite Element modelling of the complex structure. © (2013) Trans Tech Publicutions, Switzerland
Conventional and Innovative Restoration of the Apagni Romanesque Church, Damaged by the 1997 Marche-Umbria Earthquake
No full textRehabilitation of Cultural Heritage Damaged by the 15th October 1996 Earthquake at San Martino in Rio, Reggio Emilia, Italy
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