Recent seismic events showed the dramatic need, especially in case of historical and existing buildings, of important strengthening activities to be carried out. In order to properly design them, a careful assessment of real structural behaviour and load-carrying capacity of these buildings is strongly required. This is particularly important when dealing with constructions made of heterogeneous materials like masonry or stonework, where often conventional analysis techniques do not behave satisfactorily. The behaviour of historic stonework, in fact, depends from geometry of structure, geometry and strength of stone, boundary conditions and interface law between mortar and stone. In this perspective, experimental activities are also necessary. This paper presents the first results of an extensive experimental and numerical investigation on historical stone arches and vaults. A series of in-situ tests were carried out on different types of stone arches belonging to a large building of the XIX century, with the purpose of investigating their mechanical response and obtaining the structural behaviour of stonework under different types of in-plane loads. The arches were tested with symmetric static and dynamic load and then with asymmetric static load, in order to evaluate the stiffness and frequencies of vibration of the structure. A number of reconstructed stonework walls were also tested under compression in order to define the stone masonry compressive strength. The experimental structural results were compared with the numerical solutions obtained by a detailed finite element model. Numerical linear and non-linear FE analyses were conducted in order to reproduce the experimental tests and analyse the interaction between series of arches that are linked by cross vault or tunnel vault. Finally, nonlinear analyses with vertical and horizontal loads were carried out with the scope of simulating the seismic effect and to verify the behaviour of this type of vaulted structures under one direction in-plane loads. In these numerical simulations the modelling of the non-linear material behaviour is carried out on macro-level.

Analysis of structural behaviour of historical stone arches and vaults: experimental tests and numerical analyses

BOVO, MARCO;MAZZOTTI, CLAUDIO;SAVOIA, MARCO
2012

Abstract

Recent seismic events showed the dramatic need, especially in case of historical and existing buildings, of important strengthening activities to be carried out. In order to properly design them, a careful assessment of real structural behaviour and load-carrying capacity of these buildings is strongly required. This is particularly important when dealing with constructions made of heterogeneous materials like masonry or stonework, where often conventional analysis techniques do not behave satisfactorily. The behaviour of historic stonework, in fact, depends from geometry of structure, geometry and strength of stone, boundary conditions and interface law between mortar and stone. In this perspective, experimental activities are also necessary. This paper presents the first results of an extensive experimental and numerical investigation on historical stone arches and vaults. A series of in-situ tests were carried out on different types of stone arches belonging to a large building of the XIX century, with the purpose of investigating their mechanical response and obtaining the structural behaviour of stonework under different types of in-plane loads. The arches were tested with symmetric static and dynamic load and then with asymmetric static load, in order to evaluate the stiffness and frequencies of vibration of the structure. A number of reconstructed stonework walls were also tested under compression in order to define the stone masonry compressive strength. The experimental structural results were compared with the numerical solutions obtained by a detailed finite element model. Numerical linear and non-linear FE analyses were conducted in order to reproduce the experimental tests and analyse the interaction between series of arches that are linked by cross vault or tunnel vault. Finally, nonlinear analyses with vertical and horizontal loads were carried out with the scope of simulating the seismic effect and to verify the behaviour of this type of vaulted structures under one direction in-plane loads. In these numerical simulations the modelling of the non-linear material behaviour is carried out on macro-level.
Proceedings of the International Conference on Structural Analysis of Historical Constructions, SAHC 201215-17 October 2012, Wroclaw, Poland
635
643
M. Bovo; C. Mazzotti; M. Savoia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/130913
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