Fluid viscous dampers have proven to be a very efficient solution for reducing the seismic demand on structural and non-structural components, for both new and existing structures. Nowadays, the topics, which need to be further investigated, deal with the reliability and robustness of such kind of energy dissipating devices. Damper failures are generally brittle mechanisms, which can compromise the capacity of the structure to withstand the seismic action, leading to a lack of robustness of the overall system. In this study, an advanced model, which is able to describe the fluid viscous damper brittle failure, has been developed in OpenSees and is discussed. The failure of a damper is related to the exceedance of its strength capacity and can be attained because of the forces arising related to the end-stroke impact or can be due to excessive piston velocity (over-velocity). The effect of damper failure on the seismic performance of the structural system is investigated by performing multi-stripe analyses and monitoring different global and local demand parameters. The proposed model for the damper is applied to a benchmark structure, consisting on a 3-storey steel moment resisting frame.
An advanced model for the fluid viscous damper brittle failure / Gioiella, L.; Scozzese, F.; Tubaldi, E.; Ragni, L.; Dall'Asta, A.. - 2021-:(2021). (Intervento presentato al convegno 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2021 tenutosi a grc nel 2021).
An advanced model for the fluid viscous damper brittle failure
Ragni L.Membro del Collaboration Group
;
2021-01-01
Abstract
Fluid viscous dampers have proven to be a very efficient solution for reducing the seismic demand on structural and non-structural components, for both new and existing structures. Nowadays, the topics, which need to be further investigated, deal with the reliability and robustness of such kind of energy dissipating devices. Damper failures are generally brittle mechanisms, which can compromise the capacity of the structure to withstand the seismic action, leading to a lack of robustness of the overall system. In this study, an advanced model, which is able to describe the fluid viscous damper brittle failure, has been developed in OpenSees and is discussed. The failure of a damper is related to the exceedance of its strength capacity and can be attained because of the forces arising related to the end-stroke impact or can be due to excessive piston velocity (over-velocity). The effect of damper failure on the seismic performance of the structural system is investigated by performing multi-stripe analyses and monitoring different global and local demand parameters. The proposed model for the damper is applied to a benchmark structure, consisting on a 3-storey steel moment resisting frame.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
