The sliding hinge joint moment connection

MacRae, Gregory A.; Clifton, G. Charles; Mackinven, Hamish; Mago, Nandor; Butterworth, John; Pampanin, Stefano

doi:10.5459/bnzsee.43.3.202-212

Cited by 67 publications

(58 citation statements)

References 11 publications

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“…Clifton and MacRae et al . tested brass and mild steel shims, respectively, showing similar behaviour. Mild steel shims are cheaper, can be tack welded to facilitate erection and avoid dissimilar metal corrosion issues.…”

Section: Introductionmentioning

confidence: 61%

“…μ n = V ss /2N proof ), with the V ss determined from experimental testing. Previous research reported a μ n = 0.21–0.22 for mild steel and brass shims with M24 and M30 bolts. Further testing is required to determine μ n for abrasion resistant steel shims using a range of specimen sizes.…”

Section: Asymmetric Friction Connectionmentioning

confidence: 94%

“…The AFC has been shown experimentally to provide stable, repeatable and predictable load–deflection hysteretic behaviour under cyclic loading in the SHJ and at the AFC component level . When sliding occurs, inelastic demand is confined to the bolts while the other components remain elastic.…”

Section: Introductionmentioning

confidence: 99%

“…Bolt model method : The V ss is estimated using a bolt model developed by Clifton based on plastic theory, and modified by MacRae et al . . The bolt model computes the predicted V ss using the following input parameters: the coefficient of friction ( μ ), lever arm between points of bearing on the bolt ( l ), and bolt moment ( M rfn ) and shear ( V fn ) capacities.…”

Section: Introductionmentioning

confidence: 99%

“…The AFC is a type of SBC with a different configuration from the SFC tested by Grigorian and Popov [5]. The configuration of the AFC in the beam bottom flange is shown in Figure 4 The AFC has been shown experimentally to provide stable, repeatable and predictable load-deflection hysteretic behaviour under cyclic loading in the SHJ [7,18,20] and at the AFC component level [18,22]. When sliding occurs, inelastic demand is confined to the bolts while the other components remain elastic.…”

Section: Introductionmentioning

confidence: 99%

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Proposed design models for the asymmetric friction connection

Khoo

Clifton

MacRae

et al. 2014

Earthq Engng Struct Dyn

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SUMMARYThe Asymmetric Friction Connection (AFC) remains elastic during moderate earthquake shaking but slides and dissipates energy through friction during severe earthquake shaking. The sliding friction forces developed are dependent on the clamping force in the connection which is provided by fully tensioned bolts which pass through slotted holes. During sliding these bolts are subject to moment and shear as well as axial force. Moment-shear-axial force interaction reduces the clamping axial force on the sliding interfaces thereby reducing the sliding shear resistance (V ss ). Two methods to evaluate the moment-shear-axial force interaction have been proposed so that the sliding shear strength can be quantified, but as yet, these methods are not robust. This paper describes the results of 60 tests undertaken to improve the two methods, namely the moment-shear-axial force bolt model and the effective coefficient of friction method, for AFCs with high hardness steel shims. The bolts were M16 to M30 bolts and cleat thicknesses ranged from 12 mm to 25 mm. It is shown that either method may be used in design as the results obtained are similar.

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Section: Introductionmentioning

confidence: 61%

Section: Asymmetric Friction Connectionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Proposed design models for the asymmetric friction connection

Khoo

Clifton

MacRae

et al. 2014

Earthq Engng Struct Dyn

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Resilience Assessment of a two‐storey Steel Structure equipped with Innovative Connections

Elettore,

Freddi,

Latour

et al. 2023

ce papers

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In the last few decades, increasing research efforts have been devoted to the definition of innovative seismic resilient design strategies with the aim of reducing direct and indirect losses. Among others, the use of Friction Devices (FDs) for Beam‐to‐Column joints (BCJs) has emerged as an effective solution to ensure the damage‐free behaviour of steel Moment Resisting Frames (MRFs). Additionally, more recent research studies have revealed the benefits of replacing traditional full‐strength Column Bases (CBs) with innovative CBs promoting the residual drift reduction of steel MRFs. Additionally, several research studies developed and investigated structures that could be easily repaired after an extreme event, promoting a functional recovery of the structures and able to reinstate the original seismic performance in a short time. However, experimental research on suitable structural repair techniques is still marginal and the lack of confidence in the performance of repaired structures are relevant issues contributing to the high demolition rates. In this direction, an experimental campaign has been performed on a large‐scale steel structure equipped with BCJs with FDs and innovative CBs. Several pseudo‐dynamic tests have been performed and at the end of each test, the structure have been repaired by simply loosening the bolts of the FDs. Results demonstrated the effectiveness of repairing methodology.

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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

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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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The sliding hinge joint moment connection

Cited by 67 publications

References 11 publications

Proposed design models for the asymmetric friction connection

Proposed design models for the asymmetric friction connection

Resilience Assessment of a two‐storey Steel Structure equipped with Innovative Connections

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

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