Quantifying the Seismic Response of Light-frame Shear Walls with Adhesive Sheathing Concerns

Download or read book Quantifying the Seismic Response of Light-frame Shear Walls with Adhesive Sheathing Concerns written by Mona Karim Zadeh and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The seismic behavior of shear walls is inevitably associated with the connectors' characteristics. While historic shear wall studies have focused on the influence of the nail connections between the sheathing and the framing, little has been done to investigate the potential advantages of using adhesives to attach the wood structural panel sheathing to the framing in wood light-frame construction. The advantages of high strength and stiffness have been recognized for improved performance in high wind events, but a total ban on the use of adhesives to attach sheathing in light-frame shear walls was imposed by the building code for regions with high seismic risk due to the same two characteristics of walls utilizing adhesives. Therefore, the seismic design parameters and the reliability of wood shear walls using adhesive connections is not explicitly known. A better understanding of the seismic behavior of timber shear walls using adhesive connections are necessary in order to modify existing design codes to allow adhesives to be used in light-frame shear walls in high-seismic risk regions. Historic R-values lack the sufficient rational basis that accounts for the effect of ground shaking on that particular system. This research used the FEMA P-695 procedure to develop seismic performance parameters for timber shear walls utilizing adhesives to attach the sheathing. The hysteresis properties of single adhesive connector that was six inches long, called DF0744-16, were obtained from available cyclic test data from a study conducted by Misner (2014). Archetype models utilizing high aspect ratio adhesive shear walls were developed based on the hysteresis parameters of adhesive shear walls. The uncertainties related to the seismic performance of archetype configurations, subjected to ground shaking, was investigated though the collapse probability process and the nonlinear response characteristics was quantified. This study of wood light-frame walls with adhesive connectors determined that a response modification factor of 2 was sufficient for most one- and two-story residential configurations.