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Stiffness-based approach for Belleville springs use in friction sliding structural connections
https://orcid.org/0000-0003-0723-1699
https://orcid.org/0000-0002-3011-5146
AbstractSliding hinge joints (SHJs) used in beam-to-column connections of moment frames have a moment-rotational behaviour that depends on asymmetric friction connection (AFC) sliding behaviour. The AFC is also applied to column base connections and friction sliding braces. In the AFC, the slotted sliding plate is clamped between one ideally fixed surface and one partially floating surface. In current practice, the AFC bolts are fully tensioned at installation (i.e. yielded) to provide the clamping force. The AFC bolts are subjected to moment, shear, and axial force (MVP) interaction during joint sliding that is expected to occur only in severe earthquake shaking. The AFC bolt tension as well as SHJ elastic strength are reduced after a few sliding cycles. In this paper, the reasons for the AFC bolt tension loss are discussed, and solutions to prevent this bolt tension loss, including the optimum use of Belleville springs (BeSs) and installing the bolts within the elastic range, are proposed. This paper analytically shows that these solutions can generate significantly improved retention of AFC bolt tension, improved AFC sliding behaviour, higher displacement capacity to accommodate prying effects, and better AFC self-centering characteristics. Examples of AFC bolt installation within elastic range and tension loss with and without BeSs are provided. Similar models are developed for symmetric friction connections (SFCs) and compares differences in behaviour.
HighlightsHow can the compound stiffness of the friction sliding connections be determined?How can BeSs in the friction sliding connections efficiently compensate for most of the post-sliding bolt tension loss?How can BeSs improve the AFC self-centering capability and prevent the prying action induced bolts plastic elongation?What are the other potential benefits of using BeSs in the friction sliding connections?A step-by-step design procedure for using BeSs in the friction sliding connections is proposed.
Stiffness-based approach for Belleville springs use in friction sliding structural connections
https://orcid.org/0000-0003-0723-1699
https://orcid.org/0000-0002-3011-5146
AbstractSliding hinge joints (SHJs) used in beam-to-column connections of moment frames have a moment-rotational behaviour that depends on asymmetric friction connection (AFC) sliding behaviour. The AFC is also applied to column base connections and friction sliding braces. In the AFC, the slotted sliding plate is clamped between one ideally fixed surface and one partially floating surface. In current practice, the AFC bolts are fully tensioned at installation (i.e. yielded) to provide the clamping force. The AFC bolts are subjected to moment, shear, and axial force (MVP) interaction during joint sliding that is expected to occur only in severe earthquake shaking. The AFC bolt tension as well as SHJ elastic strength are reduced after a few sliding cycles. In this paper, the reasons for the AFC bolt tension loss are discussed, and solutions to prevent this bolt tension loss, including the optimum use of Belleville springs (BeSs) and installing the bolts within the elastic range, are proposed. This paper analytically shows that these solutions can generate significantly improved retention of AFC bolt tension, improved AFC sliding behaviour, higher displacement capacity to accommodate prying effects, and better AFC self-centering characteristics. Examples of AFC bolt installation within elastic range and tension loss with and without BeSs are provided. Similar models are developed for symmetric friction connections (SFCs) and compares differences in behaviour.
HighlightsHow can the compound stiffness of the friction sliding connections be determined?How can BeSs in the friction sliding connections efficiently compensate for most of the post-sliding bolt tension loss?How can BeSs improve the AFC self-centering capability and prevent the prying action induced bolts plastic elongation?What are the other potential benefits of using BeSs in the friction sliding connections?A step-by-step design procedure for using BeSs in the friction sliding connections is proposed.
Stiffness-based approach for Belleville springs use in friction sliding structural connections
https://orcid.org/0000-0003-0723-1699
https://orcid.org/0000-0002-3011-5146
AbstractSliding hinge joints (SHJs) used in beam-to-column connections of moment frames have a moment-rotational behaviour that depends on asymmetric friction connection (AFC) sliding behaviour. The AFC is also applied to column base connections and friction sliding braces. In the AFC, the slotted sliding plate is clamped between one ideally fixed surface and one partially floating surface. In current practice, the AFC bolts are fully tensioned at installation (i.e. yielded) to provide the clamping force. The AFC bolts are subjected to moment, shear, and axial force (MVP) interaction during joint sliding that is expected to occur only in severe earthquake shaking. The AFC bolt tension as well as SHJ elastic strength are reduced after a few sliding cycles. In this paper, the reasons for the AFC bolt tension loss are discussed, and solutions to prevent this bolt tension loss, including the optimum use of Belleville springs (BeSs) and installing the bolts within the elastic range, are proposed. This paper analytically shows that these solutions can generate significantly improved retention of AFC bolt tension, improved AFC sliding behaviour, higher displacement capacity to accommodate prying effects, and better AFC self-centering characteristics. Examples of AFC bolt installation within elastic range and tension loss with and without BeSs are provided. Similar models are developed for symmetric friction connections (SFCs) and compares differences in behaviour.
HighlightsHow can the compound stiffness of the friction sliding connections be determined?How can BeSs in the friction sliding connections efficiently compensate for most of the post-sliding bolt tension loss?How can BeSs improve the AFC self-centering capability and prevent the prying action induced bolts plastic elongation?What are the other potential benefits of using BeSs in the friction sliding connections?A step-by-step design procedure for using BeSs in the friction sliding connections is proposed.
Stiffness-based approach for Belleville springs use in friction sliding structural connections
Ramhormozian, Shahab (author) / Clifton, George Charles (author) / MacRae, Gregory A. (author) / Davet, George P. (author)
Journal of Constructional Steel Research ; 138 ; 340-356
2017-07-12
17 pages
Article (Journal)
Electronic Resource
English
Stiffness-based approach for Belleville springs use in friction sliding structural connections
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