Investigation of the response of low-rise wood-frame roof-wall systems under combined uplift and in-plane shear loads

The present research is focused on the behavior of roof-wall assemblies for low-rise wood-frame buildings subjected to loads generated by wind storms such as hurricanes and other high wind events. This investigation comprises monotonic and cyclic tests of full-scale roof-wall assemblies under combined uplift and shear loading. The results are compared to current design methodologies which are based on a single loading mechanism. The analysis of the results includes the development of interaction diagrams for in-plane load combinations of the roof-to-wall connections. Two practical applications of the research findings are illustrated: one is through the development of a finite element model capable of predicting the behavior of an individual light-frame shear-wall along with the roof-to-wall connection subjected to in-plane loads; and second through the proposal of an adjustment factor to the current prescriptive design method in the International Residential Code. Test results of this investigation provide important load-deformation data that could be use to calibrate more computer models for the analysis of cases that are not feasible in an experimental study. This research is an important contribution to structural engineering and wind hazard mitigation fields by improving the understanding of combined load response so that more accurate prediction of the behavior of light-frame structures under high wind forces is possible. This knowledge is crucial to enhance the design of these types of structures, to reduce losses and protect lives from hurricanes and other wind events.