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F. Scozzese, L. Gioiella, E. Tubaldi, L. Ragni,, A. Dall'Asta, "Probabilistic analysis of structures equipped with FVDs accounting for their brittle failure", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 11.2, 2022, doi:10.4203/ccc.3.11.2

Keywords: fluid viscous dampers, energy dissipation systems, seismic response, seismic risk assessment, passive protection systems, reliability factors.

Abstract

Anti-seismic devices should be designed with proper safety margins against their failure. Seismic standards generally prescribe safety factors (reliability factors) in order to reach a target safety level. In the case of Fluid Viscous Dampers (FVDs), these factors are applied to the stroke and velocity, and their values are not homogenous among seismic codes. This paper investigates the influence of the values of the safety factors for FVDs on the reliability of the devices and of the structural systems equipped with them. An advanced FVD model is employed to account for the impact forces arising when the dampers reach the end-stroke and the brittle failure due to the attainment of the maximum force capacity. The effect of damper failure on the seismic risk of the structural system is investigated by performing multiple-stripe analysis and monitoring different global and local demand parameters. A parametric study has been carried out, considering a case study consisting of a low-rise steel building, coupled with a dissipative system with linear and nonlinear properties and studying the consequences of different values of safety factors for stroke and forces.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 3 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: B.H.V. Topping and J. Kruis Paper 11.2 Probabilistic analysis of structures equipped with FVDs accounting for their brittle failure F. Scozzese¹, L. Gioiella¹, E. Tubaldi², L. Ragni³, and A. Dall'Asta¹ ¹University of Camerino, Italy ²University of Strathclyde, UK ³Università Politecnica delle Marche, Italy doi:10.4203/ccc.3.11.2 Full Bibliographic Reference for this paper F. Scozzese, L. Gioiella, E. Tubaldi, L. Ragni,, A. Dall'Asta, "Probabilistic analysis of structures equipped with FVDs accounting for their brittle failure", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 11.2, 2022, doi:10.4203/ccc.3.11.2 Keywords: fluid viscous dampers, energy dissipation systems, seismic response, seismic risk assessment, passive protection systems, reliability factors. Abstract Anti-seismic devices should be designed with proper safety margins against their failure. Seismic standards generally prescribe safety factors (reliability factors) in order to reach a target safety level. In the case of Fluid Viscous Dampers (FVDs), these factors are applied to the stroke and velocity, and their values are not homogenous among seismic codes. This paper investigates the influence of the values of the safety factors for FVDs on the reliability of the devices and of the structural systems equipped with them. An advanced FVD model is employed to account for the impact forces arising when the dampers reach the end-stroke and the brittle failure due to the attainment of the maximum force capacity. The effect of damper failure on the seismic risk of the structural system is investigated by performing multiple-stripe analysis and monitoring different global and local demand parameters. A parametric study has been carried out, considering a case study consisting of a low-rise steel building, coupled with a dissipative system with linear and nonlinear properties and studying the consequences of different values of safety factors for stroke and forces. download the full-text of this paper (PDF, 1620 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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