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Structural Engineering and Mechanics Volume 17, Number 5, May 2004 , pages 627-639 DOI: https://doi.org/10.12989/sem.2004.17.5.627 |
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Short-term cyclic performance of metal-plate-connected wood truss joints |
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Rakesh Gupta, Thomas H. Miller and Shawn M. Wicks Freilinger
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| Abstract | ||
| The objective of this research was to evaluate the performance of metal-plate-connected truss joints subjected to cyclic loading conditions that simulated seismic events in the lives of the joints. We also investigated the duration of load factor for these joints. We tested tension splice joints and heel joints from a standard 9.2-m Fink truss constructed from 38- ?89-mm Douglas-fir lumber: 10 tension splice joints for static condition and for each of 6 cyclic loading conditions (70 joints total) and 10 heel joints for static condition and for each of 3 cyclic loading conditions (40 joints total). We evaluated results by comparing the strengths of the control group (static) with those of the cyclic loading groups. None of the cyclic loading conditions showed any strength degradation; however, there was significant stiffness degradation for both types of joint. The results of this research show that the current duration of load factor of 1.6 for earthquake loading is adequate for these joints. | ||
| Key Words | ||
| wood engineering; wood connections; duration of load; seismic loads; tension splice joint; heel joint; fink truss. | ||
| Address | ||
| Rakesh Gupta; Department of Wood Science and Engineering, 114 Richardson Hall, Oregon State University, Corvallis, OR 97331, USA Thomas H. Miller; Department of Civil, Construction, and Environmental Egineering, Oregon State University, Corvallis, OR 97331, USA Shawn M. Wicks Freilinger; Oregon Department of Transportation, Salem, OR 97301, USA | ||