PSI - Issue 73

Roman Vodička et al. / Procedia Structural Integrity 73 (2025) 163 –169 Author name / Structural Integrity Procedia 00 (2025) 000 – 000

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The instants and strength of influence of all these phases are affected by the value of the parameter r as can be guessed in Fig. 2. The conclusion which might be stated is that small r provides better bearing capacity of the connector as demonstrated by the first part of the force graphs and also better stiffness of the connector after total debonding between FRP and concrete. For larger r , there also appeared larger snap-down due to release of the energy in interface damaging. In the present situation, the most advantageous seems to be r = 8.5 mm, used in the Fig. 4. Magnified deformations for the same instants as used in Fig. 3 defined by the prescribed displacement u, and the same choice of the parameter r = 8.5 mm. Magnification factor is 10 4 in all snaps.

detailed results. 4. Conclusions

The present study provides a computational analysis of a jigsaw-puzzle shaped smooth shear connector. A simple parametric study demonstrates a suitable range of a connector dimension based on the described computational approach for a cohesive interface model and procedures which implement it. The results show how the coupled materials may be improved by the geometrical connector. Anyhow, there are other physical phenomena which should be considered in a detailed analysis. First, the influence of friction between separated materials and, second, the orientation of fibres inside the FRP might have been taken into account. These phenomena will be studied in a forthcoming paper.