Plataforma de Eventos Científicos de la Universidad de Holguín, 9na Edición de la Conferencia Científica Internacional de la Universidad de Holguín

Analysis of Wind Resistance of Residential Roofs on Wood-frame Homes

Sarah Stevenson, Ayman El Ansary, Gregory Kopp

Resumen


Failures of wood-frame residential roofs are among the most common and expensive types of wind damage during tornadoes and hurricanes. Numerous recent studies have focused on reducing residential damage during tornadoes and hurricanes, and have identified weak links in the vertical load path of wood-framed homes under uplift. Wood-framed roofs are commonly studied because their failure occurs at relatively low wind speeds and can lead to destruction of the entire contents of a home. In recent work, structural details such as connections and fasteners have been determined to have a large impact on the strength of wood-framed homes. In the current research, common failures observed in wood-framed roofs is reviewed, ongoing work to prevent expensive residential damage is presented, and failure wind speeds are estimated. New recommendations for wind-resistant residential design standards in Canada will also be discussed. The results of preliminary structural analyses verify the common understanding that toe-nailed roof-to-wall connections are likely to be among the most vulnerable elements in the structure of a wood-framed house. However, it is also found that certain framing members and connections display significant vulnerability under the same wind uplift. The analysis results and damage survey observations are used to expand the understanding of wood-framed residential roof failures, and upcoming work will expand the research to analyze the entire wood-framed house structure.