Abstract
In earthquake-prone areas, upgrading of existing structures is one of the main challenges in the field of structural engineering. Seismic upgrading of old structures is deemed necessary mainly due to their poor initial design, but also due to ageing of materials. Special attention is required for masonry-infilled reinforced concrete (RC) framed buildings. In such buildings masonry infills have not been taken into account in the design phase and thus they are unreliable structural elements which may fail prematurely and/or impose local failures to critical RC elements. Advanced techniques and materials for the seismic retrofitting of such structures have been successfully used in the past; namely the externally bonded Textile-Reinforced Mortars (TRM).
The behavior of masonry-infilled RC frames subjected to cyclic loading has been experimentally investigated widely in the past. However, only one analytical model has been developed so far, describing the in-plane behavior of TRM-strengthened masonry-infilled RC frames. This model is based on the use of single strut and tie elements which follow a multi-linear response with hysteretic properties and has been validated against experimental data. This study aims to investigate the ability of materials following different hysteresis laws to capture the experimental response of a 3-story masonry-infilled RC frame, using the open-source software OpenSees. The main conclusion is that, after proper calibration, alternative materials can be used to simulate the hysteretic behavior of masonry infills, showing satisfactory agreement with the experimental results.
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Monastiridou, M., Koutas, L. (2023). Numerical Modeling of Masonry Infills in RC Frames Subjected to In-Plane Cyclic Loading: Comparison Analysis Between Different Materials in OpenSees. In: Di Trapani, F., Demartino, C., Marano, G.C., Monti, G. (eds) Proceedings of the 2022 Eurasian OpenSees Days. EOS 2022. Lecture Notes in Civil Engineering, vol 326. Springer, Cham. https://doi.org/10.1007/978-3-031-30125-4_25
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DOI: https://doi.org/10.1007/978-3-031-30125-4_25
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