Influence of viscous dampers ultimate capacity on the seismic reliability of building structures

Scozzese, Fabrizio; Gioiella, Laura; Dall’Asta, Andrea; Ragni, L.; Tubaldi, Enrico

doi:10.1016/j.strusafe.2021.102096

Cited by 35 publications

(21 citation statements)

References 41 publications

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“…The structural system of the building consists of perimeter moment-resisting frames and internal gravity frames with shear connections. The finite element model of the building (Figure 2) is a two-dimensional model representative of the weak and short direction of the building and has been developed in OpenSees following a non-linear fiber distributed approach, whose details can be found in [30] For consistency with the adopted benchmark case study, the hazard model and the related IM hazard curves are taken from [29]; however, the curves have been slightly extrapolated to make sure that the system failure probabilities can be accurately estimated, by following the recommendation of [37] about the optimal IM curve truncation for an accurate risk estimation via MSA analysis. The spectral pseudo-acceleration of a linear elastic SDOF system with 2% damping ratio and fundamental vibration period equal to that of the structure is considered as intensity measure (IM).…”

Section: Benchmark Structure and Hazard Scenariomentioning

confidence: 99%

“…For what concerns the FVDs design, this is carried out by considering the set of 30 records corresponding to a MAF of exceedance design = IM(imdesign) = 0.0021 1/yr. Further details and features of these records can be found in [30].…”

Section: Benchmark Structure and Hazard Scenariomentioning

confidence: 99%

“…Table 1 and Table 2 report, respectively, the damping properties and the design parameters of the FVDs of the three elevations of the building for both the values of the constitutive parameter . Further details concerning the dissipative devices design can be found in [30]. 1 13,780 11,914 7428 0.3 4669 4037 2517…”

Section: Damping Systemmentioning

confidence: 99%

“…Moreover, for comparison purposes, two more limit cases are considered: "No Failure" that is the case where no dampers' failures are permitted, and "Bare Model", which represents the frame without FVDs. Further details concerning the combinations of amplification factors can be found in [30].…”

Section: Amplification Factors For the Fvd Control Parametersmentioning

confidence: 99%

“…Further details regarding fragility curves and demand hazard curves, where the structural performance is analysed considering MAF of exceeding up to 10 -5 1/yr, can be found in [30].…”

Section: Introductionmentioning

confidence: 99%

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An Advanced Model for the Fluid Viscous Damper Brittle Failure

Gioiella¹,

Scozzese²,

Tubaldi³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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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.

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Section: Benchmark Structure and Hazard Scenariomentioning

confidence: 99%

Section: Benchmark Structure and Hazard Scenariomentioning

confidence: 99%

Section: Damping Systemmentioning

confidence: 99%

Section: Amplification Factors For the Fvd Control Parametersmentioning

confidence: 99%

“…Further details regarding fragility curves and demand hazard curves, where the structural performance is analysed considering MAF of exceeding up to 10 -5 1/yr, can be found in [30].…”

Section: Introductionmentioning

confidence: 99%

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