Gravity and Wind Load Path Analysis of a Light-Frame and a Traditional Timber Frame Building
Publication: Journal of Architectural Engineering
Volume 20, Issue 4
Abstract
The objective of this study was to compare structural load path and system behavior of a light-frame (LF) and a timber frame (TF) structure. This load path analysis is part of a broader research effort that compares LF to TF residential structures. Structural analysis software was used to create a model of each structure. The TF structure was composed of large-dimension timbers and structural insulated panels (SIPs). An equivalent LF structure was designed for comparison, following the guidelines of the International Residential Code. Results show that TF outperforms LF in resisting uplift, as well as in story drift. TF also provides load paths that are more resistant to the introduction of large openings and the loss of a central post. Observed axial loads in TF posts show smaller ranges compared with LF studs.
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References
Allen, E., and Thallon, R. (2011). Fundamentals of residential construction, 3rd Ed., Wiley, Hoboken, NJ.
Al Mamun, A., Ghasan, D., Ni, C., Mohammad, M., Chui, Y. H., and Asiz, A. (2011). “Alternative bracing systems in light-wood frame buildings.” Proc., Canadian Society for Civil Engineering 2011 General Conf., Montréal.
American Forest and Paper Association (AF&PA). (2005a). “National design specification for wood construction (NDS).” American National Standards Institute/American Forest and Paper Association (ANSI/AF&PA), Washington, DC.
American Forest and Paper Association (AF&PA). (2005b). “Special design provisions for wind and seismic.” American National Standards Institute/American Forest and Paper Association (ANSI/AF&PA), Washington, DC.
APA Engineered Wood Association. (2012). Panel design specification, Tacoma, WA.
ASCE. (2010). “Minimum design loads for buildings and other structures.” ASCE/SEI 7-10, Reston, VA.
Bulleit, W. M., Sandberg, B. L., Drewek, M. W., and O’Bryant, T. L. (1999). “Behavior and modeling of wood-pegged TFs.” J. Struct. Eng., 3–9.
Carradine, D. M., Woeste, F. E., Dolan, J. D., and Loferski, J. R. (2004). “Utilizing diaphragm action for wind load design of TF and structural insulated panel buildings.” For. Prod. J., 54(5), 73–80.
Computers and Structures. (2012). CSI analysis reference manual: For SAP2000, ETABS and SAFE, Berkeley, CA.
Cramer, S. M., Drozdek, J. M., and Wolfe, R. W. (2000). “Load sharing effects in light-frame wood-truss assemblies.” J. Struct. Eng., 1388–1394.
Doudak, G. (2005). “Field determination and modeling of load paths in wood light-frame structures.” Ph.D. thesis, McGill Univ., Montréal.
Erikson, R. G., and Schmidt, R. J. (2003). “Behavior of traditional TF structures subjected to lateral load.” Ph.D. thesis, Univ. of Wyoming, Laramie, WY.
Google Sketch-Up Pro 8.0.15158 [Computer software]. Mountain View, CA, Google.
International Code Council (ICC). (2009). International residential code for one- and two-family dwellings – 2009, Country Club Hills, IL.
Malone, B. P. (2013). “LF versus traditional TF: A study in comparing the differences.” M.S. thesis, Oregon State Univ., Corvallis, OR.
Martin, K. G., Gupta, R., Prevatt, D. O., Datin, P., and van de Lindt, J. (2011). “Modeling system effects and structural load paths in a wood-framed structure.” J. Archit. Eng., 134–143.
Martin, Z., Skaggs, T.D., Keith, E.L., and Yeh, B. (2008). “Principles of mechanics model for wood structural panel portal frames.” Proc., Structures Congress 2008, D. Anderson, C. Ventura, D. Harvey, M. Hoit, eds., ASCE, Reston, VA, 1–9.
Mtenga, P. V., Cramer, S. M., Peyrot, A. H., and Wolfe, R. W. (1995). “System factors for light-frame wood truss assemblies.” J. Struct. Eng., 290–300.
Nairn, J. (2007). OSULaminates – Java application for laminated theory analysis, version 2.1, 〈http://www.cof.orst.edu/cof/wse/faculty/Nairn/OSULaminates.html〉 (Feb. 1, 2013).
Pfretzschner, K., Gupta, R., and Miller, T. H. (2013). “Practical modeling for load paths in a realistic, LF wood house.” J. Perform. Constr. Facil., in press.
Prevatt, D. O., et al. (2012). “Building damage observations and EF classifications from the Tuscaloosa, AL and Joplin, MO tornadoes.” Proc., Structures Congress 2012, ASCE, Reston, VA, 999–1010.
SAP 2000 [Computer software]. Walnut Creek, CA, Computers and Structures.
Seaders, P. (2004). “Performance of partially and fully anchored wood frame shear walls under monotonic, cyclic and earthquake loads.” M.S. thesis, Oregon State Univ., Corvallis, OR.
Shanks, J., and Walker, P. (2009). “Strength and stiffness of all-timber pegged connections.” J. Mater. Civ. Eng., 10–18.
Simpson Strong-Tie. (2013) “LTT/HTT tension ties.” 〈http://www.strongtie.com/products/connectors/HDU-DTT2.asp〉 (May 5, 2013).
TF Engineering Council (TFEC). (2010). Standard for design of TF structures and commentary, TF Engineering Council, Becket, MA.
Thomas, W. H. (2003). “Poisson’s ratios of an oriented strand board.” Wood Sci. Technol., 37(3–4), 259–268.
van de Lindt, J. W., Graettinger, A., Gupta, R., Skaggs, T., Pryor, S., and Fridley, K. (2007). “Performance of wood-frame structures during Hurricane Katrina.” J. Perform. Constr. Facil., 108–116.
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© 2013 American Society of Civil Engineers.
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Received: Jun 17, 2013
Accepted: Sep 24, 2013
Published online: Sep 26, 2013
Discussion open until: May 11, 2014
Published in print: Dec 1, 2014
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