Latest revision as of 14:36, 30 November 2021

Abstract

The adoption of effective strengthening techniques of historical constructions is one of the most widely debated aspects in structural engineering. Within this topic, the application of steel fiber reinforced mortar (SFRM) has been recently proposed as a low invasive and effective way to obtain a considerable structural benefit in the safety of existing masonry structure. To this purpose, in this paper the experimental results obtained on a circular masonry arches are presented. The considered specimens, subjected to a vertical increasing static load, is tested in the unstrengthened and strengthened configurations, and is part of a wider experimental campaign. After presenting and discussing the experimental results, they are compared with those relative to numerical simulations conducted by means of a discrete macro-element (DME) strategy, based on a simple mechanical scheme, able to model the nonlinear behavior of masonry structures with a limited computational effort. Such an approach is here extended to model the SFRM strengthening technique accounting for the main failure mechanisms associated to the combined presence existing masonry and the additional strengthening layer applied at the intrados of the arch. Numerical and experimental results demonstrate the efficacy of the proposed retrofitting strategy both in terms of bearing capacity and increase of ductility.

Full document

References

[1] D. V. Oliveira, I. Basilio, and P. B. Lourenço, “Experimental Behavior of FRP Strengthened Masonry Arches,” J. Compos. Constr., vol. 14, no. 3, pp. 312–322, 2010.

[2] P. Zampieri, N. Simoncelo, C. D. Tetougueni, and C. Pellegrino, “A review of methods for strengthening of masonry arches with composite materials,” Eng. Struct., vol. 171, no. May, pp. 154–169, 2018.

[3] Simoncello N, Zampieri P, Gonzalez-libreros J, Pellegrino C. Experimental behaviour of damaged masonry arches strengthened with steel fiber reinforced mortar (SFRM). Comp. Part B 2019; 177:107386. https://doi.org/10.1016/j.compositesb.2019.107386.

[4] Zampieri, P. Horizontal capacity of single-span masonry bridges with intrados FRCM strengthening (2020) Composite Structures, 244, art. no. 112238, . DOI: 10.1016/j.compstruct.2020.112238.

[5] Zampieri, P., Simoncello, N., Gonzalez-Libreros, J., Pellegrino, C. Evaluation of the vertical load capacity of masonry arch bridges strengthened with FRCM or SFRM by limit analysis (2020) Engineering Structures. DOI: 10.1016/j.engstruct.2020.111135

[6] Caliò, I., Marletta, M., and Pantò, B. (2012). A new discrete element model for the evaluation of the seismic behaviour of unreinforced masonry buildings. Eng. Struct. 40, 327– 338. doi:10.1016/j.engstruct.2012.02.039

[7] B. Pantò, F. Cannizzaro, I. Caliò, P.B. Lourenço Numerical and experimental validation of a 3D macro-model for the in-plane and out-of-plane behaviour of unreinforced masonry walls – (2017) International Journal of Architectural Heritage, 11(7), pp.946-964 doi: 10.1080/15583058.2017.1325539.

[8] I. Caliò, F. Cannizzaro, M. Marletta (2010). A discrete element for modeling masonry vaults.7th International Conference on Structural Analysis of Historical Constructions (SAHC2010). Shanghai (China) 6-8 Ottobre 2010.

[9] F. Cannizzaro, P.B. Lourenço, Simulation of Shake Table Tests on Out-of-Plane Masonry Buildings. Part (VI): Discrete Element Approach – (2017) International Journal of Architectural Heritage, 11(1), pp. 125-142 doi: http://dx.doi.org/10.1080/15583058.2016.1238973.

[10] Pantò, B., Cannizzaro, F., Caddemi, S., and Caliò, I. (2016). 3D macro-element modelling approach for seismic assessment of historical masonry churches. Adv. Eng. Softw. 97, 40–59. doi:10.1016/j.advengsoft.2016.02.009

[11] Cannizzaro, F., Pantò, B., Caddemi, S., and Caliò, I. (2016). A Discrete Macro-Element Method (DMEM) for the nonlinear structural assessment of masonry arches. Eng. Struct. (2018) 168:243–56

[12] Pantò, B., Cannizzaro, F., Caddemi, S., Caliò, I., Chácara, C. and Lourenço, PB., Nonlinear modelling of curved masonry structures after seismic retrofit through FRP reinforcing. Buildings (2017) 7:79.