A considerable amount of research has focused on load-sharing and system
effects in repetitive-member wood floor systems subject to transverse loading.
However, relatively few studies have been conducted to investigate load-sharing
and system effects in repetitive-member wall systems which may be subject to
combined transverse and gravity (vertical) loading, and which may have different
boundary conditions from floors. This research investigates load-sharing and
system effects in light-frame wood wall systems and seeks to develop repetitive-member
system factors for codified design that rationally account for load sharing
and other system effects. These factors are intended for use in the design of
individual wall members, much as repetitive-member factors are used in the design
of parallel-member floor and roof systems. As part of this research, an analytical
model was developed to account for partial composite action, two-way action, and
openings in the wall system. The model was validated using experimental test
results and was shown to be able to predict reasonably well the response of light-frame
wall systems. The model was then incorporated into a Monte Carlo
simulation to perform reliability analyses of light-frame wall systems. Since the
structural model is complex, and including a time-history analysis within the time-dependent
simulation was not computationally practical, the load combination issue
was considered separately from the reliability analysis. Sensitivity studies were
conducted to investigate how different system parameters affect strength and
reliability of light-frame wall systems. The reliability of light-frame wall systems
was next evaluated using a portfolio of representative light-frame wall systems
designed according to current code provisions. This portfolio approach was also
used in evaluating system factors for light-frame wall systems. Thus, two different
approaches (a reliability-based approach and a strength-ratio approach) were
considered for developing system factors for member-design to account for load
sharing, partial composite action and other system effects. Using the strength-ratio
approach, a new framework for system factors (i.e., partial system factors) is
suggested in which the effects of partial composite action, load sharing, load
redistribution and system size (number of members) are treated separately. / Graduation date: 2003
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/30106 |
| Date | 17 January 2003 |
| Creators | Yu, Guangren |
| Contributors | Rosowsky, David V. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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