I've just started the modeling part. I've learned that I can model FRCM as smeared reinforcement. Is there some example or detail that can help?
Visit Advanced tutorials on Atena Documentation section of cervenka website. You will find it.
http://www.cervenka.cz/products/atena/documentation/
There is an example also for the Analysis of fiber reinforced concrete structures, where one of the main problems the user typically need to solve is the proper definition of the fiber reinforced concrete material parameters. This process typically involves an inverse analysis of standard material tests. This process is in detail described in this tutorial with an application to segmental tunnel lining.
Thank you for the reply Umer. I'll try to explore what you have suggested and see if I find a way.
Modelling update:
I've had decent success in modelling FRCM. I also think since I am working on Basalt fibers it's easier to work on those and working on Carbon or Glass fibers would have been more challenging. One general tip for everyone is to make sure every single material you're defining should be having the exact properties of the materials being used in your experimental program (if you've one). I'm experiencing very good results once I've used the properties of those materials (not the one's quoted by the vendor but the actual ones).
You can check the following article:
Article Experimental results and modelling of corrosion-damaged conc...
It depends on the kind of modelling you are developing. If you want to do macromodeling (i.e. only to predict the bearing capacity of the beam) you can model the FRCM as a lamina with an assigned reduced tensile strenght (see AC434 code or De Santis, S., Hadad, H. A., De Caso y Basalo, F., De Felice, G., & Nanni, A. (2018). Acceptance Criteria for Tensile Characterization of Fabric-Reinforced Cementitious Matrix Systems for Concrete and Masonry Repair. Journal of Composites for Construction, 22(6), 04018048. ). Be aware that in this way you are doing a rough approximation and you can predict only the maximum load.
Differenly, if you want to do micro-modelling you need to model the fibre-to-matrix interface by a 3d interface model. This is not an easy task, especially for parameters to be set, but you can refer to the following works for more details Mazzucco, G., D'Antino, T., Pellegrino, C., & Salomoni, V. (2018). Three-dimensional finite element modeling of inorganic-matrix composite materials using a mesoscale approach. Composites Part B: Engineering, 143, 75-85. ; Grande, E., Imbimbo, M., & Sacco, E. (2018). Numerical investigation on the bond behavior of FRCM strengthening systems. Composites Part B: Engineering, 145, 240-251. )
Hi,
I had reasonable results from modeling FRCM composites with carbon and PBO fibers in Atena using 1D reinforcement and shell elements.
You can check my publication for more details: Thesis FRCM-composites for strengthening concrete walls with openings
Cristian
Check the ATENA-Science "ATENA-Science-GiD_Tutorial_Strengthening" PDF file and just perform a search with strengthening and ATENA in google scholar; you will find a lot of research paper which can help you with your questions.
Do not forget to check the ATENA forum for similar questions and solutions as well.
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