PSI - Issue 44

Francesca Mattei et al. / Procedia Structural Integrity 44 (2023) 1204–1211 F.Mattei,G.Giuliani, R.Andreotti, S.Caprili, N.Tondini/ Structural Integrity Procedia 00 (2022) 000 – 000

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dynamic nonlinear analysis (DA) at global level (CBF equipped with DRBrC), experimental tests such as pseudo static cyclic tests on the single components (Proenca et al., 2002) and Hybrid Simulation on the entire CBF equipped with DRBrC structure (Kanyilmaz et al. 2022). In the present work, a comparison between the structural response of the selected six-storeys CBF equipped with DRBrC, obtained both by HS and by DA is reported. The comparison has been performed considering, for the numerical modelling and for the HS, a simplified formulation, included in recently published design guidelines, to describe the constitutive axial monotonic and cyclic law of the dissipative components. From the comparison, a good agreement between experimental and numerical results in terms of base shear and top displacements emerged, even considering all the uncertainties inherently present of the nonlinear analysis, such as the damping and the nonlinearities of the model. In particular, for each analysed limit state, a slightly underestimation of the forces in numerical results with respect to the experimental ones is observed, due to the fact that simplified law adopted for DRBrC in numerical analysis is lower respect to the real one. Finally, the results of the work validate the effectiveness of the law, that could represent an efficient instrument for the designer and practitioners to predict the behaviour of Concentric Braced Steel Frame equipped with DRBrC. Acknowledgments This project has received funding from the Research Fund for Coal and Steel under grant agreement No 800699. Views and opinions expressed are however those of the authors only and do not necessarily reflect those of the European Union or Research Fund for Coal and Steel. Neither the European Union nor the Research Fund for Coal and Steel can be held responsible for them. 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