Nonlinear Finite‐Element Model for Light‐Frame Stud Walls
Publication: Journal of Structural Engineering
Volume 118, Issue 11
Abstract
Considerable attention has been given to the performance and modeling of wood‐frame stud walls in the past two decades, and linear and nonlinear models were presented. Linear models do not truly describe the wall behavior. They either underestimate or overestimate the wall stiffness, depending upon load applied. In this presentation, the writers use load‐deflection characteristics to transform a three‐dimensional detailed model of a wood‐frame stud wall into a simple two‐dimensional model made equivalent to the original substructure by energy concepts. The detailed model is represented in three dimensions by linear and nonlinear finite elements, where each nail joint is included via its translational stiffness. Gaps and discontinuities in the sheathing are also considered. The model is loaded in shear, torsion, X‐, and Y‐bending, simulating simple tests of the real substructure. Results are used to identify properties of an “equivalent” orthotropic continuum. The application of equivalent models in a full‐structure nonlinear analysis yields the global behavior of the structure (deflections and reactions), in reasonable computer times.The approach can be used for wood‐frame stud walls with or without openings. The method may be particularly useful to those evaluating alternative designs in manufactured structures or for structures with redundant substructures.
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References
1.
ANSYS User's Manual. (1989). Swanson Analysis Systems, Inc., Houston, Pa.
2.
Breyer, D. E. (1988). Design of wood structures. McGraw‐Hill Book Company, New York, N.Y.
3.
Cheung, K. G., Itani, R. Y., and Polensek, A. (1988). “Characteristics of wood diaphragms: Experimental and parametric studies.” Wood and Fiber Sci., 20(4), 438–456.
4.
Corder, S. E., Atherton, G. H., and Polensek, A. (1966). “Side‐loaded tests of stuccoed frame walls.” Report T‐21, Forest Res. Lab., Oregon State Univ., Corvallis, Oreg.
5.
Easley, J. T., Foomani, M., and Dodds, R. H. (1982). “Formulas for wood shear‐walls.” J. Struct. Div., ASCE, 108(11), 2461–2478.
6.
Groom, K. M. (1992). “Nonlinear finite‐element modeling of intercomponent connections in light‐frame wood structures,” MS thesis, Oregon State University, Corvaflis, Oregon.
7.
Gupta, A. K., and Kuo, G. P. (1985). “Behavior of wood‐framed shear walls.” J. Struct. Engrg., ASCE, 111(8), 1722–1733.
8.
Gupta, A. K., and Kuo, G. P. (1987). “Wood‐framed shear walls with uplifting.” J. Struct. Engrg., ASCE, 113(2), 241–259.
9.
Hata, M., and Sasaki, H. (1987). “Structural analysis of racking behavior of nailed stressed‐skin panels and behavior of transmitted forces through nails. Part I” (in Japanese). Mokuzai Gakkaishi, Tokyo, Japan, 33(1), 12–18.
10.
Hata, M., Takino, S., and Sasaki, H. (1988). “Structural analysis of racking behavior of nailed stressed‐skin panels and behavior of transmitted forces through nails. Part II” (in Japanese). Mokuzai Gakkaishi, Tokyo, Japan, 34(9), 718–723.
11.
Itani, R. Y., and Cheung, C. K. (1983). “Nonlinear analysis of sheathed wood diaphragms.” J. Struct. Engrg., ASCE, 110(9), 2137–2147.
12.
Itani, R. Y., and Robledo, F. M. (1984). “Finite‐element modeling of light‐frame wood walls.” Civ. Engrg. for Practicing and Design Engrs., 3, 1029–1045.
13.
Kohnke, P. C., ed. (1989). ANSYS engineering analysis sytem theoretical manual. Swanson Analysis Systems, Inc., Houghton, Pa.
14.
Lekhnitskii, S. G. (1987). Anisotropic plates. Gordon and Breach Sci. Publishers, New York, N.Y.
15.
Okabe, M., Maruyama, N., and Arima, T. (1985). “The effect of the structura performance of post and beam construction with wood frame panels I.” Mokuzai Gakkaishi, 31(8), 648–656.
16.
Patton‐Mallory, M., Gutkowski, R. M., and Sotis, L. A. (1984). “Racking performance of light‐frame walls sheathed on two sides.” USDA Forest Service Research Paper FPL 448, Forest Products Lab., Madison, Wisc.
17.
Peterson, J. (1983). “Bibliography on lumber and wood panel diaphragms.” J. Struct. Engrg., ASCE, 109(12), 2838–2852.
18.
Phillips, T. L. (1990). “Load sharing characteristics of three‐dimensional wood diaphragms,” MS thesis, Washington State at University, Pullman, Washington.
19.
Polensek, A. (1975). “Finite element analysis for wood‐stud walls under bending and compression loads.” Limited Distribution Report, Forest Res. Lab., Oregon State Univ., Corvallis, Oreg.
20.
Polensek, A. (1976a). “Nonlinear behavior of nailed wood‐stud walls at service loads and overloads.” Proc., Second Int. Conference on Mech. Behavior of Materials. Federation of Materials Society.
21.
Polensek, A. (1976b). “Finite‐element analysis of wood‐stud walls.” J. Struct. Div., ASCE, 102(7), 1317–1335
22.
Polensek, A. (1976c). “Rational design procedure for wood‐stud walls under bending and compression loads.” Wood Sci., 9(1), 8–20.
23.
Polensek, A., and Atherton, G. H. (1976). “Compression‐bending strength and stiffness of walls with utility grade studs.” For. Prod. J., 26(11), 17–25.
24.
Schmidt, R. J., and Moody, R. C. (1989). “Modeling laterally loaded light‐frame buildings.” J. Struct. Engrg., ASCE, 115(1), 201–217.
25.
Tokuda, M. (1985). “Measurement of shearing forces induced on nails holding sheathing to frames in wall‐racking tests” (in Japanese). Mokuzai Gakkaishi, Tokyo, Japan, 31(1), 39–42.
26.
Tuomi, R. L., and McCutcheon, W. J. (1978). “Racking strength of light‐frame nailed walls.” J. Struct. Div., ASCE, 104(7), 1131–1140.
27.
Wolfe, R. W. (1983). “Contribution of gypsum wallboard to racking resistance of light‐frame walls.” USDA Forest Service Research Paper FPL 439, Forest Products Lab., Madison, Wisc.
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Copyright © 1992 ASCE.
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Published online: Nov 1, 1992
Published in print: Nov 1992
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