Seventeenth and eighteenth century timber roof structures in Scotland: Design, pathologies and conservation

Serafini, Anna; Gonzalez-Longo, Cristina

doi:10.1201/9781315616995-106

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In residential buildings and in the predominant part of currently erected public buildings, a way of evenly transferring loads is provided by flat ceilings treated as rigid horizontal shields [1]. In historic masonry structures, ceilings of this type are usually absent, and their counterparts are coveringsvaults and roof truss structures [5,6]. Unfortunately, compared to rigid ceilings, they have a much lower stiffness in the horizontal plane, which makes their impact on the increase in the vulnerability of the entire structure even greater.…”

Section: Introductionmentioning

confidence: 99%

Archives of Civil Engineering

Miedziałowski,

Szkobodziński,

Czech

2022

View full text Add to dashboard Cite

The work concerns the influence of the method of numerical modelling of the connections of the roof truss and vaults with the walls of historic masonry objects structures on the local stress distribution in the walls. At the outset, the need to search for rational modelling was justified due to the large size of the calculation models and the erroneous results obtained with oversimplification of the model. Four methods of modelling the connections between the walls and roof truss and vaults were analysed. The first method was to describe the elements of walls and foundations as solid elements, the ribs of the vaults and the roof truss as beam elements, and the vaulting webs as shell elements. The remaining methods 2-4 describe the walls as shell elements. In places where the walls join with the roof truss and vaults, fictitious/fictional elements in the form of rigid horizontally-oriented shells were used in model No. 2. In model No. 3, fictitious rigid horizontally-oriented shell elements in addition to local rigid vertically-oriented shells were used, while in model No. 4, only fictitious rigid vertically-oriented shell elements with stepwise decreasing protrusions were introduced. The best solution in terms of local stress distribution turned out to be the description of connections with fictitious shell elements in the case of model No. 4. This approach slightly increases the number of unknowns, and makes the results of stresses in the connection areas realistic in relation to full modelling with solid finite elements.

show abstract

Section: Introductionmentioning

confidence: 99%

Archives of Civil Engineering

Miedziałowski,

Szkobodziński,

Czech

2022

View full text Add to dashboard Cite

show abstract

“…e building consists of the main Hall B and the smaller adjacent Hall C [32], both designed and constructed by Nervi (1947Nervi ( -1948Nervi ( and 1950. A historical aerial view of the building is reported in Figure 1. …”

Section: E Turin Exhibition Centrementioning

confidence: 99%

Sensor Placement Strategies for the Seismic Monitoring of Complex Vaulted Structures of the Modern Architectural Heritage

Lenticchia

Ceravolo

Antonaci

2018

Shock and Vibration

View full text Add to dashboard Cite

Effective diagnostic and monitoring systems are highly needed in the building and infrastructure sector, to provide a comprehensive assessment of the structural health state and improve the maintenance and restoration planning. Vibration-based techniques, and especially ambient vibration testing, have proved to be particularly suitable for both periodic and continuous monitoring of existing structures. As a general requirement, permanent systems must include a sensing network able to run a continuous surveillance and provide reliable analyses based on different information sources. e variability in the environmental and operating conditions needs to be accounted for in designing such a sensor network, but it is mainly the structural typology that governs the optimal sensor placement strategy. Architectural heritage consists of a great variety of buildings and monuments that significantly differ from each other in terms of typology, historic period, construction techniques, and materials. In this paper, the main issues regarding seismic protection and analysis of the modern architectural heritage are introduced and applied to one of the vaulted structures built by Pier Luigi Nervi in the Turin Exhibition Centre. e importance of attaining an adequate level of knowledge in historic structures is also highlighted. After an overview of the Turin Exhibition Centre and its construction innovations, this paper focuses on Hall B, describing the structural design conceived by Pier Luigi Nervi. A seismic assessment of the structures of Hall B is then presented, considering the potential seismic damage to nonstructural elements. Subsequently, the application of an optimal sensor placement strategy is described with reference to two different scenarios: the first one corresponding to the undamaged structure and the second one that considers a possible damage to the infill walls. Finally, a novel damage-scenario-driven sensor placement strategy based on a combination of the two above mentioned is proposed and discussed. One of the major conclusions drawn from the analyses performed is that nonstructural elements undergoing seismic damage or degradation may significantly affect the global dynamic response and consequently the optimal sensing configurations.

show abstract