Symmetric friction dampers in beam-to-column joints for low-damage steel MRFs

Tartaglia, R.; D’Aniello, Mario; Campiche, Alessia; Latour, Massimo

doi:10.1016/j.jcsr.2021.106791

Cited by 50 publications

(29 citation statements)

References 26 publications

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“…To achieve this goal, FEM simulations using the software ABAQUS (ver.2017) have been performed. Reference is made to the calibration reported in [7] and to the experimental and numerical results obtained in [18] where the devices with single-slotted holes for row of bolts have been investigated. A set of four friction dampers (FDs) was considered to cover different structural geometries that are representative of typical European multi-story steel MRFs.…”

Section: Description Of the Investigated Joints And Relevant Damper C...mentioning

confidence: 99%

“…where M pl,beam is the plastic moment of the beam, and m is the bending utilization factor, ranging from 0.3 to 0.6. A thorough investigation of the maximum and minimum values of m has been formerly conducted in [7,18].…”

Section: Description Of the Investigated Joints And Relevant Damper C...mentioning

confidence: 99%

“…The preload in the bolts of the friction damper was assumed equal to the corresponding design value, while the preload recommended by EN1993 1-8 [16] was applied to all other bolts. Boundary conditions were consistently modeled as in [7], namely as follows: (i) the column was pinned at the lower end, releasing all flexural rotations and vertical displacements at the upper end, allowing the column to deform freely along its axis; (ii) the beam tip was simply pinned in the initial step, and the beam was additionally restrained against lateral-torsional buckling by introducing torsional restraints spaced according to [20]. Monotonic displacement histories were applied at the beam tip in a vertical direction.…”

Section: Finite Element Modelingmentioning

confidence: 99%

“…The effectiveness of these dampers has been validated through numerous studies and applications across seismicprone regions, including Europe and Japan. Notably, European studies have focused on symmetric friction mechanisms [7,8] in contrast to the asymmetric friction mechanisms explored in New Zealand [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Parametric Finite Element Study on FREEDAM Beam to Column Joints with Different Details of the Haunch Slotted Holes

D’Aniello,

Montuori,

Nastri

et al. 2024

Applied Sciences

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Parametric Finite Element (FE) simulations were performed to investigate the ultimate flexural of different configurations of friction steel beam-to-column joints equipped with FREEDAM (free from damage) dampers. The main aim of this study was to compare the effectiveness of friction dampers featuring either single or multiple slotted holes, examining how these variations influence the behavior of the joint and the devices under seismic loads. In particular, the ultimate behavior of the connection (i.e., when the device reaches its maximum stroke) was investigated to characterize the involvement of the bolts in shear, the bearing of the plates, and the yielding of the supporting components. The analysis of bolt stress states revealed significant differences influenced by the number of bolts and slots. The FE models were calibrated against the experimental results obtained within the FREEDAM RFCS Project. These insights contribute to the design and performance evaluation of steel beam-to-column joints with FREEDAM connections, in particular the detailing of the haunch slots, laying the groundwork for future research and applications.

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Section: Description Of the Investigated Joints And Relevant Damper C...mentioning

confidence: 99%

Section: Description Of the Investigated Joints And Relevant Damper C...mentioning

confidence: 99%

Section: Finite Element Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parametric Finite Element Study on FREEDAM Beam to Column Joints with Different Details of the Haunch Slotted Holes

D’Aniello,

Montuori,

Nastri

et al. 2024

Applied Sciences

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show abstract

“…from damage connection can be advantageous. These connections, developed during the previous RFCS FREEDAM project, have a sliding mechanism given by a friction damper with slotted holes localised at the lower beam flange, which proved to be quite efficient to dissipate high amounts of energy during extreme seismic events [9], keeping the remaining components of the connection and structure under elastic range. Furthermore, even for column loss scenarios, the use of these connections presented some advantages as the extra "elastic" ductility to the connection given by the slip allows great vertical deformations without inelastic deformations of the structure and early failure [10,11].…”

Section: Introductionmentioning

confidence: 99%

Finite element study on the behaviour of free from damage connections under fire

Santos,

Santiago,

Craveiro

et al. 2023

ce papers

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The free from damage connection, developed during the recent RFCS FREEDAM has shown to be a promising solution to dissipate high amounts of energy due to its sliding system given by the friction damper with slotted holes, located at the lower beam flange. Additionally, this sliding mechanism proved to be also efficient in the event of exceptional loading scenarios such as impact loads or even in column loss scenarios, because it allows the dissipation of part of the action through slipping and, on the other hand, gives an extra “elastic” ductility to the connection since, up to the end of the slip, the components of the connection are designed to remain in the elastic range.In this paper, this specific behaviour is exploited in the case of fire scenario. During fire events, axial forces can develop in the beams (initially in bending, only) due to the expansion of the steel elements and the restraint provided by the boundary conditions. For the cases where the high axial forces develop, the moment‐rotation behaviour of the connections will change due to the interaction between the axial forces (N) and bending moment (M) as well as the effects due to the increase in temperature. The the use of connections such as the free from damage connection is interesting also from this point of view since it delays the development of great axial forces due to its slipping mechanism. This analysis is carried out through FEM analysis using ABAQUS software.

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Pseudo‐dynamic testing, repairability, and resilience assessment of a large‐scale steel structure equipped with self‐centering column bases

Elettore,

Freddi,

Latour

et al. 2024

Earthq Engng Struct Dyn

Self Cite

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Recent destructive seismic events have underlined the need for increasing research efforts devoted to the development of innovative seismic‐resilient structures able to reduce seismic‐induced direct and indirect losses. Regarding steel Moment Resisting Frames (MRFs), the inclusion of Friction Devices (FDs) in Beam‐to‐Column Joints (BCJs) has emerged as an effective solution to dissipate the seismic input energy while ensuring a damage‐free behavior. Additionally, recent studies have demonstrated the benefits of implementing similar damage‐free solutions for Column Bases (CBs). In this context, the authors have recently experimentally investigated a Self‐Centering CB (SC‐CB) aimed at residual drift reduction. Previous experimental tests only focused on the response of isolated SC‐CBs under cyclic loads. Conversely, the present paper advances the research through an experimental campaign on a large‐scale steel structure equipped with the proposed SC‐CBs, providing valuable insights into the global structural response and improved repairability. A set of eight Pseudo‐Dynamic (PsD) tests were conducted considering different records and configurations of the structure. The experimental results highlighted the effectiveness of the SC‐CBs in minimizing the residual interstory drifts and protecting the first‐story columns from damage, thus enhancing the structure's resilience. Moreover, the consecutive PsD tests allowed investigating the effectiveness of the reparation process in restoring the seismic performance of the ‘undamaged’ structure. An advanced numerical model was developed in OpenSees and validated against the global and component‐level experimental results. Incremental Dynamic Analyses were finally performed to investigate the influence of the SC‐CBs on the structure's seismic response while accounting for the record‐to‐record variability.

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Symmetric friction dampers in beam-to-column joints for low-damage steel MRFs

Cited by 50 publications

References 26 publications

Parametric Finite Element Study on FREEDAM Beam to Column Joints with Different Details of the Haunch Slotted Holes

Parametric Finite Element Study on FREEDAM Beam to Column Joints with Different Details of the Haunch Slotted Holes

Finite element study on the behaviour of free from damage connections under fire

Pseudo‐dynamic testing, repairability, and resilience assessment of a large‐scale steel structure equipped with self‐centering column bases

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