Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.

The shear capacity of gypsum sheathed shear walls is typically neglected in areas of high seismicity due to the susceptibility of conventional drywall screw connections to damage caused by earthquakes. This paper presents an alternative to the conventional screwed sheathing connection found in wood-framed gypsum shear walls. A viscoelastic (VE) polymer was inserted between the sheathing and the stud framing. A sheathing connection study and shear wall study were performed, and the results of the VE connection show a dramatic increase in stiffness and energy dissipation over the conventional screwed connection. Energy dissipation increases 632% for the sheathing connection and 510% for the shear wall. Stiffness of the shear wall also improves. The VE polymer improves structural performance while resisting damage when subjected to shear displacements up to 18 mm by providing a constant source of energy dissipation. This new VE sheathing connection may allow for weak or nonstructural materials, such as gypsum wallboard, to be used as structural elements for design purposes while reducing the risk of costly damages during seismic events.

Main Author: Dinehart, D. W.
Other Authors: Blasetti, A. S., Shenton III, H. W.
Format: Villanova Faculty Authorship
Language: English
Published: 2008
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dc_source_str_mv Journal of Structural Engineering, Vol. 134, No. 1, January 2008, pp. 87-95.
author Dinehart, D. W.
author_facet_str_mv Dinehart, D. W.
Blasetti, A. S.
Shenton III, H. W.
author_or_contributor_facet_str_mv Dinehart, D. W.
Blasetti, A. S.
Shenton III, H. W.
author_s Dinehart, D. W.
spellingShingle Dinehart, D. W.
Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
author-letter Dinehart, D. W.
author_sort_str Dinehart, D. W.
author2 Blasetti, A. S.
Shenton III, H. W.
author2Str Blasetti, A. S.
Shenton III, H. W.
dc_title_str Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
title Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
title_short Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
title_full Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
title_fullStr Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
title_full_unstemmed Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
collection_title_sort_str experimental cyclic performance of viscoelastic gypsum connections and shear walls.
title_sort experimental cyclic performance of viscoelastic gypsum connections and shear walls.
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description The shear capacity of gypsum sheathed shear walls is typically neglected in areas of high seismicity due to the susceptibility of conventional drywall screw connections to damage caused by earthquakes. This paper presents an alternative to the conventional screwed sheathing connection found in wood-framed gypsum shear walls. A viscoelastic (VE) polymer was inserted between the sheathing and the stud framing. A sheathing connection study and shear wall study were performed, and the results of the VE connection show a dramatic increase in stiffness and energy dissipation over the conventional screwed connection. Energy dissipation increases 632% for the sheathing connection and 510% for the shear wall. Stiffness of the shear wall also improves. The VE polymer improves structural performance while resisting damage when subjected to shear displacements up to 18 mm by providing a constant source of energy dissipation. This new VE sheathing connection may allow for weak or nonstructural materials, such as gypsum wallboard, to be used as structural elements for design purposes while reducing the risk of costly damages during seismic events.
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dc.title Experimental Cyclic Performance of Viscoelastic Gypsum Connections and Shear Walls.
dc.creator Dinehart, D. W.
Blasetti, A. S.
Shenton III, H. W.
dc.description The shear capacity of gypsum sheathed shear walls is typically neglected in areas of high seismicity due to the susceptibility of conventional drywall screw connections to damage caused by earthquakes. This paper presents an alternative to the conventional screwed sheathing connection found in wood-framed gypsum shear walls. A viscoelastic (VE) polymer was inserted between the sheathing and the stud framing. A sheathing connection study and shear wall study were performed, and the results of the VE connection show a dramatic increase in stiffness and energy dissipation over the conventional screwed connection. Energy dissipation increases 632% for the sheathing connection and 510% for the shear wall. Stiffness of the shear wall also improves. The VE polymer improves structural performance while resisting damage when subjected to shear displacements up to 18 mm by providing a constant source of energy dissipation. This new VE sheathing connection may allow for weak or nonstructural materials, such as gypsum wallboard, to be used as structural elements for design purposes while reducing the risk of costly damages during seismic events.
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