PSI - Issue 44

Corrado Chisari et al. / Procedia Structural Integrity 44 (2023) 1108–1115 Corrado Chisari et al./ Structural Integrity Procedia 00 (2022) 000 – 000

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4. Conclusions In this paper, some results of a recently completed experimental programme on unreinforced and reinforced arches subjected to horizontal forces are analysed and some numerical investigations presented. The experimental observations show that, unlike ordinary mortar, FRLBM is characterised by significant ductility as an effect of dispersed fibres in the paste. When applied at the intrados of the arch, such ductility increment is able to provide a strong increase in resistance to the system at large deformation levels, while ordinary mortar confers a much more limited overall improvement. Furthermore, FRLBM also provides a restraint to the formation of hinges at intrados, potentially leading to different collapse mechanisms characterised by sliding between blocks. Preliminary numerical simulations show that simplified micro-modelling can be successfully adopted to reproduce experimental outcomes. However, the results show a strong dependence on the nonlinear constitutive relationship used for both block-block and arch-retrofitting interfaces, especially in the case of FRLBM. Pre-existing damage should also be taken into account to avoid overestimation of the peak strength in the case of ordinary mortar. Future research will investigate these aspects to provide comprehensive modelling guidelines and more in-depth results about the effectiveness of the retrofitting strategy on a larger scale. Acknowledgements The experimental program described in this paper has been funded by the University of Campania “Luigi Vanvitelli”, through the research project “ARCH - Advanced Retrofitting for Curved Historical structures ”, within the program VALERE 2020. References Borri, A., Castori, G., Corradi, M., 2011. Intrados strengthening of brick masonry arches with composite materials. Composites Part B: Engineering 42(5), 1164-1172. Bustos-García, A., Moreno-Fernández, E., Zavalis, R., Valivonis, J., 2019. Diagonal compression tests on masonry wallets coated with mortars reinforced with glass fibers. Materials and Structures 52(60). Chisari, C., Cacace, D. & De Matteis, G., 2021. Parametric investigation on the effectiveness of frm-retrofitting in masonry buttressed arches. Buildings 11(9), 406. Dassault Systemes, 2013. ABAQUS 6.12-1 Documentation. Providence, RI: Dassault Systémes. De Matteis, G. & Zizi, M., 2019. Seismic Damage Prediction of Masonry Churches by a PGA-based Approach. International Journal of Architectural Heritage 13(7), 1165-1179. Lee, J. & Fenves, G., 1998. Plastic-damage model for cyclic loading of concrete structures. Journal of Engineering Mechanics 124(8), 892-900. Simoncello, N., Zampieri, P., Gonzalez-Libreros, J. & Pellegrino, C., 2019. Experimental behaviour of damaged masonry arches strengthened with steel fiber reinforced mortar (SFRM ). Composite Part B Engineering 177, 107386.