Probabilistic friction model for aluminium–steel Asymmetric Friction Connections (AFC)

Multiple physical variables potentially affect the friction coefficient of Asymmetric Friction Connections (AFC). This paper discusses the cyclic response of a class of AFC subjected to repeated load protocols. Two phenomena are observed. First, the friction coefficient, initially higher due to wear...

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Bibliographic Details
Published in:Engineering structures 2023-01, Vol.274, p.115159, Article 115159
Main Authors: Aloisio, Angelo, Contento, Alessandro, Boggian, Francesco, Tomasi, Roberto
Format: Article
Language:English
Subjects:
Aluminum
Asymmetry
Axial forces
Bayesian analysis
Bayesian calibration
Coefficient of friction
Cyclic loads
Dissipation
Friction
Friction dampers
Hysteresis models
Load tests
Mathematical models
Probabilistic model
Probabilistic models
Repeated loading
Seismic protection
Shear forces
Steel
Structural design
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Summary:Multiple physical variables potentially affect the friction coefficient of Asymmetric Friction Connections (AFC). This paper discusses the cyclic response of a class of AFC subjected to repeated load protocols. Two phenomena are observed. First, the friction coefficient, initially higher due to wear phenomena and moment-axial force-shear force interaction, stabilizes after multiple cycles. Second, the test repetitions on the same specimen show that the friction coefficient at the beginning of the loading protocol is higher than that observed at the end of the antecedent load protocol. The experimental data prove that the dissipated energy during the current load test, temperature, and the specimen’s history affect the friction coefficient. This paper presents two probabilistic friction models calibrated using a Bayesian approach. The first engineering-oriented model is dependent on the dissipated hysteretic energy. The second includes the measured temperature as a model regressor to estimate its possible role in the response. The proposed probabilistic models can be used to predict with satisfactory accuracy the friction coefficient in Coulomb-like hysteresis models of AFCs. •Repeated experimental cyclic tests on Asymmetric Friction Connections (AFC).•Temperature effects on friction response.•Bayesian probabilistic model for the friction coefficient of AFC.•Description and evolution of the e-CLT technology.•Pros and Cons of AFC devices.
ISSN:0141-0296
1873-7323
DOI:10.1016/j.engstruct.2022.115159