Viscoelastic Polymers Improve Cyclic Performance of Wood Connections.
This study focused on improving the stiffness and energy dissipation capacity of nailed wood connections by sandwiching thin layers [0.015”, (0.4 mm)] of viscoelastic (VE) polymers between the sheathing and stud. Replicate conventional and VE connections were subjected to a 10 cycle sin wave of constant amplitude at a frequency of 1.0 Hz. Three different 3M polymers and a blend of the three polymers were investigated. The nailed connections that included 3M’s 110 polymer demonstrated superior performance compared to conventional connections, with increases in stiffness and energy dissipation of over 100%. The VE connections (no nail) exhibited greater stiffness and energy dissipation than conventional nailed specimens. The proposed VE fastening system could drastically reduce the use of conventional fasteners, and significantly decrease the structural and non-structural damage of woodframe structures due to cyclic loads.
|Main Author:||Dinehart, David W.|
|Other Authors:||Joye, Donald D., Gonzalez de Mendoza, Enrique.|