Pseudo-Static Response of Masonry Cross Vaults to Imposed Shear Displacements at the Springings

Abstract:

The static and dynamic performances of historical masonry churches are closely related to the behaviour of each substructure, as well as to the mechanical properties of the constituent materials. Information on damage location and extent, collected after recent violent Italian earthquakes, highlighted that masonry vaults are among the most vulnerable elements. The investigation of their dynamic behaviour under earthquake excitation (stress and deformation states) is a fundamental issue for effective structural interventions. During an earthquake ground motion, cross vaults are basically subjected to two phenomena: (i) the "shaking"/dynamic response of the vault system itself, vibrating above the lateral walls and piers, and (ii) the response of the vault to imposed displacements at its springings, accommodating the significant movements of the lateral walls and piers. Within this context, this paper aims at improving the knowledge of the structural behaviour of cross vaults under static shear deformation at the springings, by means of an experimental test representative of a Gothic cross vault from the aisle of the Holyrood Abbey in Edinburgh (UK). The experimental test was performed on a 1:4 scaled specimen built with timber and lime mortar. The shear displacement was applied by moving two abutments until failure. The deformation of the vault was recorded in space with a Total Station. The results of the tests are reported in this paper in terms of crack pattern evolution, vertical displacements of the transverse ridge, identifying the shear displacement levels corresponding to significant damages in the vault.

• Periodical: Key Engineering Materials (Volume 747)
• Pages: 456-464
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.747.456
• Online since: July 2017
• Authors: Carmela Carfagnini, Simonetta Baraccani, Stefano Silvestri, Dimitris Theodossopoulos*
• Keywords: Experimental Tests, Masonry Cross Vault, Shear Displacement, Springings

References

[1] Cattari, S.; Resemini, S.; Lagomarsino, S., Modelling of vaults as equivalent diaphragms in 3D seismic analysis of masonry buildings. Proceedings of sixth international conference on structural analysis of historical construction, 2008, Bath, UK.

DOI: 10.1201/9781439828229.pt5

[2] Cattari, S.; Lagomarsino S.; Resemini S., Il ruolo delle volte nella risposta sismica degli edifici in muratura (The role of vaults in the seismic response of masonry buildings) In: Archi e volte in zona sismica – Meccanica delle strutture voltate, 2012, Naples, Italy.

DOI: 10.1007/88-470-0454-3_5

[3] Heyman, J. The stone skeleton, In: International Journal of Solid and Structures, 1966, UK.

[4] Heyman, J. The stone skeleton: structural engineering of masonry architecture. Cambridge University Press, 1995, UK.

[5] De Lorenzis L, De Jong MJ, Ochsendorf JA., Failure of masonry arches under impulse base motion. 2007 Earthq Eng Struct Dyn 36: 2119–2136.

DOI: 10.1002/eqe.719

[6] Ferrario L, Marini A, Andreis V, Zanotti S, Riva P, Giuriani E., Behaviour and retrofitting of singleleaf vaults under distributed horizontal forces. (2012) In: Jerzy J (ed) Structural analysis of historical constructions. Wroclaw, p.1503–1511).

[7] Shapiro EE, Collapse mechanism of small-scale unreinforced masonry vaults. (2012) M.S. Thesis in Building Technology, Massachusetts Institute of Technology.

[8] Williams MS, Albuerne A, Lawson V, Yip F, Model scale shaking table tests on masonry barrel and cross vaults. (2012) In: Proceedings of the 15th world conference on earthquake engineering, Lisbon.

[9] Van Mele T, McInerney J, DeJong M, Block P, Physical and computational discrete modeling of masonry vault collapse. (2012) In: Proceedings of the 8th international conference on structural analysis of historical constructions, Wroclaw.

[10] Theodossopoulos, D. Structural Behaviour of Historic Masonry Cross Vaults,. (2002) PhD Dissertation, University of Edinburgh.

[11] Theodossopoulos, D., Sinha, B. P. & Usmani, A. A case study of the failure of a cross vault: church of Holyrood Abbey (2003). Journal of Architectural Engineering ASCE 9(2003).

DOI: 10.1061/(asce)1076-0431(2003)9:3(109)

[12] Theodossopoulos, D., Makoond, N., Akl, L The effect of boundary conditions on the behaviour of pointed masonry barrel vaults: Late gothic cases in Scotland (2016). The Open Construction and Building Technology Journal. 10 (2016), 274-292.

DOI: 10.2174/1874836801610010274

[13] Theodossopoulos, D., Sanderson, J., Scott, M., Strengthening masonry cross vaults damaged by geometric instability (2015). Key Engineering Materials. 624, 635-643.

DOI: 10.4028/www.scientific.net/kem.624.635

[14] Castellazzi, G., D'Altri A. M., De Miranda S., Tralli A., Numerical modeling of seismic-induced damage in historical masonry vaults: a case-study in the 2012 Emilia earthquake-stricken area, (2016).

DOI: 10.1016/j.jobe.2017.08.005

[15] Milani G., Rossi M., Calderini C., Lagomarsino S., Tilting plane tests on a small-scale masonry cross vault: Experimental results and numerical simulations through a heterogeneous approach (2016) Engineering Structures 123 (2016) 300–312.

DOI: 10.1016/j.engstruct.2016.05.017

[16] McWilliam, Colin, Gifford, John e Walker, David, Edinburgh, The Buildings of Scotland, Penguin, 1984, ISBN 0-14-071068-X.

[17] Theodossopoulos, D. The catastrophic repairs of Holyrood Abbey church in 1760. International Journal of Architectural Heritage. 10(7), 954-974.

DOI: 10.1080/15583058.2016.1160302

[18] T. Bunyan, J. A. Fairhurst, A. Mackie e A. A. Macmillan, Building stones of Edinburgh, Edinburgh: Edinburgh Geological Society, (1987).