Technical Report
 

Metal-plate-connected wood joints : a literature review

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https://ir.library.oregonstate.edu/concern/technical_reports/gq67js42j

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  • "This publication has presented an overview of current research on MPC joints in wood trusses. The literature search was primarily of U.S. sources, with some effort to obtain literature from other parts of the world. An enormous amount of important information has been amassed by studies on testing procedures and theoretical models. Among the many attributes that must be considered in modeling and analysis of joints and trusses are the effect of load angle, wood-plate orientation, size, thickness, stiffness of steel plates, and specific gravity of wood on the strength of the joints, as well as the effect of the gap closure between members, tooth damage or length, and tooth layout on the overall joint performance. Extensive research has been done on tension joints in trusses; some has been done on heel connections, but very little has been done on web and other connections. Researchers have devoted considerable effort to understanding tensile joints under axial loading. However, experience suggests that even tensile joints are subjected to combined loadings because of eccentricities. The behavior of a simple MPC joint is very complex and influenced by many variables, including plate properties, joint geometry, and the natural variability of wood. An integrated approach, as used by Foschi (1977), that considers the material behavior and interactions of wood and plate and that is simple but sufficiently accurate for designing joints should be developed. A standard method for studying the long-term behavior of MPC joints should be developed and used in design. One possible option would be to use a time-temperature superposition principle for developing long-term data from relatively short-term tests. Failure modes of the truss joints should be characterized. Work on dynamic behavior and environmental effects on the joints is also needed."--Summary and conclusions.
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