Uplift Capacity of Light-Frame Rafter to Top Plates Connections Applied with Elastomeric Construction Adhesives
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 5
Abstract
The effects of the application of elastomeric construction adhesives on the wind uplift resistance of light-frame wood connections were investigated and are presented in this paper. Previous research has revealed that proper roof-to-wall connections play a critical role in mitigating structural damage during severe winds by providing a continuous load transfer path from the roof down to the foundation. Monotonic uplift tests of 30 rafter-to-top-plates connections of six configurations were conducted. Two specimen groups, standard ring shank nails alone and strengthened with hurricane ties, were constructed with and without elastomeric adhesive application, and their wind uplift resistances were compared to explore the effectiveness of the two adhesives (i.e., polyurethane and polyether) when applied to the roof connections. Experimental results show that the addition of adhesives allowed both groups to resist higher uplift loads (approximately 200%–460%) and dissipate considerably more energy (approximately 200%–750%). Replacing hurricane ties with the adhesives approximately doubles the uplift capacity but reduces the energy dissipation by nearly half owing to reduced deformation capacity. Failure modes were also examined to provide reasonable explanations for the observed performance of the connections.
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Acknowledgments
The authors acknowledge the funding received through Georgeau Construction Research Institute under the project grants program. They also thank Mr. Phillip Georgeau, president of Green Link Institute, for his technical support and selecting the adhesives used in this study. The authors appreciate the help of Emad Zaghalil, graduate student at Western Michigan University, in constructing the test specimens and conducting some of the tests.
References
Alldredge, D. J., J. A. Gilbert, H. A. Toutanji, T. Lavin, and M. S. Balasubramanyam. 2012. “Uplift capacity of polyurea-coated light-frame rafter to top plate connections.” J. Mater. Civ. Eng. 24 (9): 1201–1210. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000492.
American Wood Council. 2018. National design specification (NDS). Leesburg, VA: American Wood Council.
ASTM. 2012. Standard test methods for mechanical fasteners in wood. ASTM D1761. West Conshohocken, PA: ASTM.
ASTM. 2017a. Standard specification for driven fasteners: Nails, spikes, and staples. ASTM F1667. West Conshohocken, PA: ASTM.
ASTM. 2017b. Standard test method for strength properties of adhesives in shear by tension loading. ASTM D2339. West Conshohocken, PA: ASTM.
ASTM. 2018. Standard test methods for cyclic (reversed) load test for shear resistance of vertical elements of the lateral force resisting systems for buildings. ASTM E2126. West Conshohocken, PA: ASTM.
Canbek, C., A. Mirmiran, A. G. Chowdhury, and N. Suksawang. 2011. “Development of fiber-reinforced polymer roof-to-wall connection.” J. Compos. Constr. 15 (4): 644–652. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000194.
Cheng, J. 2004. “Testing and analysis of the toe-nailed connection in the residential roof-to-wall system.” For. Products J. 54 (4): 58–65.
Conner, H. W., D. S. Gromala, and D. W. Burgess. 1987. “Roof connections in houses: Key to wind resistance.” J. Struct. Eng. 113 (12): 2459–2474. https://doi.org/10.1061/(ASCE)0733-9445(1987)113:12(2459).
Datin, P. L., D. O. Prevatt, and W. Pang. 2011. “Wind-uplift capacity of residential wood roof-sheathing panels retrofitted with insulating foam adhesive.” J. Archit. Eng. 17 (4): 144–154. https://doi.org/10.1061/(ASCE)AE.1943-5568.0000034.
Dias, P. 2015. “Is toughness a better metaphor than resilience ?” Civ. Eng. Environ. Syst. 32 (1–2): 68–76. https://doi.org/10.1080/10286608.2015.1016922.
Edmonson, W. C., S. D. Schiff, and B. G. Nielson. 2012. “Behavior of light-framed wood roof-to-wall connectors using aged lumber and multiple connection mechanisms.” J. Perform. Constr. Facil. 26 (1): 26–37. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000201.
Ellingwood, B. R., D. V. Rosowsky, Y. Li, and J. H. Kim. 2004. “Fragility assessment of light-frame wood construction subjected to wind and earthquake hazards.” J. Struct. Eng. 130 (12): 1921–1930. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:12(1921).
FEMA. 2006. Summary report on building performance: Hurricane Katrina 2005. FEMA 548. Washington, DC: FEMA.
FEMA. 2010. Home builder’s guide to coastal construction: Technical fact sheet series. Washington, DC: FEMA.
FEMA. 2012. Spring 2011 tornadoes: Building performance observations, recommendations, and technical guidance: Mitigation Assessment Team report. Washington, DC: US Dept. of Homeland Security, FEMA.
Forest Products Laboratory. 1952. Technical note number 119: Strength of southern pine and Douglas-fir compared. Madison, WI: Forest Products Laboratory.
Forest Products Laboratory. 1978. Adhesives in building construction. Madison, WI: Forest Products Laboratory.
Frihart, C. R., and J. F. Beecher. 2016. “Factors that lead to failure with wood adhesive bonds.” In Proc., World Conf. on Timber Engineering. Washington, DC: United States Dept. of Agriculture.
Gillespie, R. H., and B. H. River. 1972. Elastomeric adhesive in building construction, 11–23. Madison, WI: Forest Products Laboratory Forest Service, US Dept. of Agriculture.
Henderson, D. J., J. D. Ginger, M. J. Morrison, and G. A. Kopp. 2009. “Simulated tropical cyclonic winds for low cycle fatigue loading of steel roofing.” Wind Struct. 12 (4): 383–400. https://doi.org/10.12989/was.2009.12.4.383.
IBHS (Insurance Institute for Business & Home Safety). 2019. The FORTIFIED HomeTM–Hurricane standard. Tampa, FL: IBHS.
Jacobs, W. P. V. 2003. Performance of pressure sensitive adhesive tapes in wood light-frame shear walls. Blacksburg, VA: Univ. Libraries, Virginia Polytechnic Institute and State Univ.
Loushin, S. 2012. “Choosing and using structural adhesives.” Accessed November 14, 2018. http://www.machinedesign.com/adhesives/choosing-and-using-structural-adhesives.
Muñoz, W., A. Salenikovich, M. Mohammad, and P. Quenneville. 2008. Determination of yield point and ductility of timber assemblies: In search for a harmonised approach. Madison, WI: Wood Products Association.
NOAA (National Oceanic and Atmospheric Administration). 2017. “U.S. billion-dollar weather and climate disasters 1980-2017.” Accessed January 14, 2018. https://www.ncdc.noaa.gov/billions/.
Rammer, D. R., S. G. Winistorfer, and D. A. Bender. 2001. “Withdrawal strength of threaded nails.” J. Struct. Eng. 127 (4): 442–449. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:4(442).
Reed, T. D., D. V. Rosowsky, and S. D. Schiff. 1997. “Uplift capacity of light-frame rafter to top plate connections.” J. Archit. Eng. 3 (4): 156–163. https://doi.org/10.1061/(ASCE)1076-0431(1997)3:4(156).
Rosowsky, D. V., T. D. Reed, K. G. Tyner, and R. Rosowsky. 1998. “Establishing uplift design values for metal connectors in light-frame construction.” J. Test. Eval. 26 (5): 426–433. https://doi.org/10.1520/JTE12024J.
Satheeskumar, N., D. J. Henderson, J. D. Ginger, and C. H. Wang. 2016. “Wind uplift strength capacity variation in roof-to-wall connections of timber-framed houses.” J. Archit. Eng. 22 (2): 04016003. https://doi.org/10.1061/(ASCE)AE.1943-5568.0000204.
Shanmugam, B., B. G. Nielson, and S. D. Schiff. 2011. “Multi-axis treatment of typical light-frame wood roof-to-wall metal connectors in design.” Eng. Struct. 33 (12): 3125–3135. https://doi.org/10.1016/j.engstruct.2011.07.031.
Simiu, E., and R. H. Scanlan. 1996. Wind effects on structures: Fundamentals and applications to design. 3rd ed. Mineola, NY: Dover Publications.
Simpson Strong Ties. 2019. “Wood construction connectors Catalog.” Accessed April 24, 2019. https://embed.widencdn.net/pdf/plus/ssttoolbox/jg8ztjcq8z/C-C-2019.pdf.
Tse, M. F. 1989. “Studies of triblock copolymer-tackifying resin interactions by viscoelasticity and adhesive performance.” J. Adhes. Sci. Technol. 3 (1): 551–570. https://doi.org/10.1163/156856189X00407.
Turner, M. A., R. H. Plaut, D. A. Dillard, J. R. Loferski, and R. Caudill. 2009. “Tests of adhesives to augment nails in wind uplift resistance of roofs.” J. Struct. Eng. 135 (1): 88–93. https://doi.org/10.1061/(ASCE)0733-9445(2009)135:1(88).
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 5 • May 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jan 14, 2019
Accepted: Oct 11, 2019
Published online: Feb 24, 2020
Published in print: May 1, 2020
Discussion open until: Jul 24, 2020
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