Numerical Modelling of FRCMs Confined Masonry Column

Abstract:

The Fabric Reinforced Cementitious Matrices (FRCMs) are promising strengthening solution for existing masonry since the inorganic matrix is considerably compatible with historical substrates. Nevertheless, the matrix is responsible for the stress-transfer in composites so, in case of poor-quality mortar, the effectiveness of the strengthening can be limited or even compromised. For this reason, a few studies have been targeted to this aspect in the recent past, while numerical investigations are still limited. The present paper refers to a Finite Element (FE) analysis of masonry columns confined with FRCM composites developed by Abaqus-code and based on the macro-model approach. At this scope, available experimental results were used for the calibration regarding different types of the matrix (lime and cement based) for FRCM-confinement. The model was performed by using the Plastic (P) and the Concrete Damage Plasticity (CDP) material constitutive laws. The FRCM-strengthened system was preliminary modeled as a homogenous elastic material until failure. Typical failures of FRCM-systems are the detachment of the matrix from the substrate, slippage of the fibers within the embedding matrix, detachment of the composite strip at the fabric-matrix interface and fiber rupture. In this study, a perfect bond was considered for the interaction between the masonry column and the external reinforcement according to the experimental observations (calibration specimens). The parametric analysis allowed to evidence the influence of the mechanical and geometrical parameters on the structural performances of the FRCM-system in confining column.

• Periodical: Key Engineering Materials (Volume 817)
• Pages: 9-14
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.817.9
• Online since: August 2019
• Authors: Salvatore Verre, Alessio Cascardi, Maria Antonietta Aiello, Luciano Ombres*
• Keywords: Confinement, FRCM System, Masonry Column, Numerical Modelling

References

[1] Micelli, F., Cascardi, A., & Marsano, M. (2016, June). Seismic strengthening of a theatre masonry building by using active FRP wires. In Brick and Block Masonry: Proceedings of the 16th International Brick and Block Masonry Conference (pp.753-761).

DOI: 10.1201/b21889-94

[2] Cascardi, A., Dell'Anna, R., Micelli, M., Lionetto, F., Aiello, MA. And Maffezzoli, A. Reversible FRP-confinement of heritage masonry columns. Proceedings of the 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2018) At: Paris, France.

DOI: 10.1016/j.conbuildmat.2019.07.124

[3] Maddaloni, G., Cascardi, A., Balsamo, A., Di Ludovico, M., Micelli, F., Aiello, M. A., & Prota, A. (2017). Confinement of full-scale masonry columns with FRCM systems. In Key Engineering Materials (Vol. 747, pp.374-381). Trans Tech Publications.

DOI: 10.4028/www.scientific.net/kem.747.374

[4] Minafò, G., & La Mendola, L. (2018). Experimental investigation on the effect of mortar grade on the compressive behaviour of FRCM confined masonry columns. Composites Part B: Engineering, 146, 1-12.

DOI: 10.1016/j.compositesb.2018.03.033

[5] Ombres, L., & Verre, S. (2018). Masonry columns strengthened with Steel Fabric Reinforced Cementitious Matrix (S-FRCM) jackets: Experimental and numerical analysis. Measurement, 127, 238-245.

DOI: 10.1016/j.measurement.2018.05.114

[6] Cascardi, A., Longo, F., Micelli, F., & Aiello, M. A. (2017). Compressive strength of confined column with Fiber Reinforced Mortar (FRM): New design-oriented-models. Construction and Building Materials, 156, 387-401.

DOI: 10.1016/j.conbuildmat.2017.09.004

[7] Cascardi, A., Aiello, M. A., & Triantafillou, T. (2017). Analysis-oriented model for concrete and masonry confined with fiber reinforced mortar. Materials and Structures, 50(4), 202.

DOI: 10.1617/s11527-017-1072-0

[8] Carloni, C., Mazzotti, C., Savoia, M., & Subramaniam, K. V. (2014). Confinement of Masonry Columns with PBO FRCM Composites. Key Engineering Materials, 624.

DOI: 10.4028/www.scientific.net/kem.624.644

[9] Mezrea, P. E., Yilmaz, I. A., Ispir, M., Binbir, E., Bal, I. E., & Ilki, A. (2016). External jacketing of unreinforced historical masonry piers with open-grid basalt-reinforced mortar. Journal of Composites for Construction, 21(3), 04016110.

DOI: 10.1061/(asce)cc.1943-5614.0000770

[10] Murgo, F. S., & Mazzotti, C. (2019). Masonry columns strengthened with FRCM system: Numerical and experimental evaluation. Construction and Building Materials, 202, 208-222.

DOI: 10.1016/j.conbuildmat.2018.12.211

[11] Cascardi, A., Micelli, F., & Aiello, M. A. (2018). FRCM-confined masonry columns: experimental investigation on the effect of the inorganic matrix properties. Construction and Building Materials, 186, 811-825.

DOI: 10.1016/j.conbuildmat.2018.08.020

[12] Sadrmomtazi, A., Khabaznia, M., & Tahmouresi, B. (2016). effect of organic and inorganic matrix on the behavior of FRP-wrapped concrete cylinders. Journal of Rehabilitation in Civil Engineering.

[13] ABAQUS Finite Element Code. 2014. Hibbitt, Karlsson & Sorensen, Imc, RI.

[14] G. Fortunato, M.F. Funari, P. Lonetti, Survey and seismic vulnerability assessment of the Baptistery of San Giovanni in Tumba (Italy). J Cult Herit, 26 (2017) 64-78.

DOI: 10.1016/j.culher.2017.01.010

[15] F.J. Vecchio, M.P. Collins. The modified compression-field theory for reinforced concrete elements subjected to shear. ACI Structural Journal (1986) 219-231.

DOI: 10.14359/10416

[16] G.M. Chen, J.G. Teng, J.F. Chen, Q.G. Xiao, Finite element modeling of debonding failure in FRP-strengthened RC beams: a dynamic approach, Computer and Structures 158 (2015) 167-183.

DOI: 10.1016/j.compstruc.2015.05.023