In this paper various aspects of the effect of eccentricity in overturning
restraint devices used in light-framed wood shear walls is
discussed. To accurately assess the demand on the tension
end post, nonlinear finite element modeling is used to investigate
the effect that sheathing/nailing can have on the boundary
posts in shear walls. Results are presented at both the allowable
stress design level and at the strength limit state, and these
results are compared against a bare post analysis. Additionally,
both one and two story conditions are analyzed. The results
show that the sheathing/nailing can significantly reduce the
internal post stresses, and this reduction is proportional
to post stiffness and nail spacing. Finally, various aspects
of the In-Grade testing program used to determine wood resistance
values in the United States are discussed because of the impact
they have on the actual distribution of strength in a given
grade of lumber.
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