Abstract
A novel strengthening technique has been examined in this study using additional Ultra High Performance Fibre Reinforcement Concrete (UHPFRC) for the improvement of the structural performance of existing masonry structures. UHPFRC is a material with enhanced cementitious matrix and high percentage of steel fibres which is characterised by considerably improved compressive strength, tensile strength, and ductility.
In this study, an extensive numerical investigation has been conducted on Unreinforced Masonry (URM) walls. The examined units have been strengthened with the addition of UHPFRC layers in combination with repointing of the mortar joints with UHPFRC. Finite Element Analyses have been conducted using a numerical model for UHPFRC which has been calibrated using experimental data from previous studies. A parametric study has been conducted taking into account the effect of the bricks-to-mortar and bricks-to-UHPFRC interface. The results of this study highlight the efficiency of the proposed technique for the structural upgrade of existing URM structures. The effect of the slip between the UHPFRC and the existing URM has also been evaluated and based on the results of this study; the slip can be considerably reduced by the addition of UHPFRC to the joints.
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Lampropoulos, A.P., Tsioulou, O.T., Dritsos, S.E. (2018). Numerical Investigation of Strengthened Unreinforced Masonry (URM) Structures with Ultra High Performance Fibre Reinforced (UHPFRC) Layers. In: Hordijk, D., Luković, M. (eds) High Tech Concrete: Where Technology and Engineering Meet. Springer, Cham. https://doi.org/10.1007/978-3-319-59471-2_20
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DOI: https://doi.org/10.1007/978-3-319-59471-2_20
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