Thesis
Lateral resistance of steel-clad, wood-framed shear walls with openings
Washington State University
Master of Science (MS), Washington State University
05/2016
Handle:
https://hdl.handle.net/2376/103506
Abstract
Steel-clad, wood-framed (SCWF) shear walls and diaphragms serve as the main lateral force resisting systems of post-frame structures. When compared to traditional light-frame wood construction, less is known about lateral design of SCWF shear walls with openings. The objectives of this research were to investigate the monotonic response of SCWF shear walls with openings through finite element analysis (FEA) and physical testing, examine the accuracy of the FEA model, evaluate common light-frame shear wall design methods for use with SCWF shear walls, and to examine the effect of aspect ratio (h/bs) through FEA. An existing FEA model was used to analyze the lateral resistance of SCWF shear walls under monotonic loading of wainscoting and three opening types; two windows and a pedestrian door. Full-scale shear wall tests (16 ft x 12 ft) were performed to validate the model. The ratio of predicted to tested shear strength and shear stiffness averaged 99% and 113% respectively, showing that the FEA model accurately predicted the response of SCWF shear walls. FEA was also used to investigate the effect of aspect ratio on three SCWF shear wall constructions; unstitched, lightly stitched, and heavily stitched. It was found that as the aspect ratio increases, the shear strength and effective shear stiffness of each construction converges suggesting that the wood framing becomes the main lateral force resisting system. The methods examined for SCWF shear walls with openings were the segmented shear wall design method, the perforated shear wall design method, and the Boor method which is being used by one post-frame design firm. The Boor method is similar to the segmented method, but accounts for the increased flexibility of narrow shear wall segments. The average ratio of predicted to actual design load for the segmented method and Boor method was 89%. Based on these results, it is recommended that the segmented method or Boor method be used for SCWF shear wall design. The recommended shear wall design method will allow structural engineers to design safer and economical post-frame structures. The FEA model can be a useful tool to investigate different scenarios of SCWF shear walls.
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Details
- Title
- Lateral resistance of steel-clad, wood-framed shear walls with openings
- Creators
- Dustin G. Gatchalian
- Contributors
- Donald A. Bender (Chair)Daniel J Dolan (Committee Member)William Franklin Cofer (Committee Member) - Washington State University, Civil and Environmental Engineering, Department of
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Number of pages
- 95
- Identifiers
- 99900525059601842
- Language
- English
- Resource Type
- Thesis