Light-Frame Wall Systems: Performance and Predictability.
Forest Service research paper,
FOREST PRODUCTS LAB MADISON WI
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Conventional analysis methods seriously underestimate the strength and stiffness of light-frame wall systems. To better predict the strength and stiffness of these systems, a finite element based computer program, FINWALL, has been developed at Oregon State University OSU. Previous testing at OSU during model development can now be augmented by the tests described in this paper to provide additional model verification. Test results are presented for 10 walls loaded under a constant axial and uniform increasing lateral load to failure. Failure loads ranged from 88 to 130 pounds per square foot lbsq ft of lateral load, corresponding to about 4 to 6 times design load. Average stud deflections at a common design load of 20 lbsq ft were 0.09 to 0.21 inch spandeflection ratio average 600. Predicted performance, based on the computer model, is compared with test results. Average strength and deflection are predicted at 1.10 and 1.06 times test values, respectively. Model sensitivity to stud failure deflections and problems with load application during some of the tests added considerable variability to the model predictions. Potential applications of the model to codes and standards are discussed.
- Wood, Paper and Related Forestry Products
- Computer Programming and Software
- Structural Engineering and Building Technology