Probability Distributions for Wood Walls in Bending
Publication: Journal of Structural Engineering
Volume 110, Issue 3
Abstract
Strength and stiffness distributions of wood‐stud walls were simulated on a computer using experimentally determined properties of framing, sheathing, and joints. Distributions were generated for conventional wall constructions framed with Douglas‐fir and southern pine studs of Stud grade, and sheathed with nominal 3/4 in. (19.0 mm) bevel siding of 3/8 in. (9.5 mm) plywood siding on one side and 1/2 in. (13 mm) gypsunv wallboard on the other side. This construction represents common types of walls with proven infield performance. Each simulated wall was analyzed by a computer model. The ultimate lateral load and average and maximum stud deflections were fitted to Weibull three parameter probability functions. The results, based on stud properties unadjusted for moisture content or load duration, indicate that all simulated wall types can sustain loads exceeding those expected in a 100 year wind. Actually, all wall types except those with 24 in. (610 mm) stud spacing would be safe under a 200 year wind in most parts of the United States. Such results are consistent with field observations, indicating that structural failures in light frame construction are not initiated in the walls, but rather in the connections between the walls and either the floor or roof. The results also show that walls with studs of either species display about the same performance, and that an occasional stud that does not meet the grade changes wall strength and stiffness very little.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 110 • Issue 3 • March 1984
Pages: 619 - 636
Copyright
Copyright © 1984 ASCE.
History
Published online: Mar 1, 1984
Published in print: Mar 1984
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