Parameters Influencing Behavior of Diaphragms
Publication: Journal of Structural Engineering
Volume 109, Issue 2
Abstract
This paper presents a theoretical study of glue laminated lumber diaphragms. All glue lines are made up of elastomeric adhesives having stiffnesses of 90 psi‐900 psi. The use of such adhesives provides an incomplete partial composite. Three parameters which influence the behavior of diaphragms are studies. These include the stiffness of glue lines, the number of courses, and properties of the decking. Analytical results show that a large number of layers produces flexible diaphragms. It is also shown that gluing a few of the courses along the outer edges of the diaphragm may be sufficient to provide the proper strength and serviceability. In addition, the use of higher grade wood for the outer layers provides economical means of obtaining the strength required.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Anderson, M., “Behavior of Wood Beams Bonded with an Elastomeric Adhesive,” thesis presented to Washington State University, (Department of Civil and Environmental Engineering) at Pullman, Wash., in 1976, in partial fulfillment of the requirements for the degree of Master of Science.
2.
Carney, J. M., “Bibliography of Wood and Plywood Diaphragms,” Journal of the Structural Division, Vol. 101, No. ST11, Nov., 1975, pp. 2423–2436.
3.
Clark, L. G., “Deflection of Laminated Beams,” Transactions, ASCE, Vol. 119, 1954, pp. 721–736.
4.
Foschi, R. O., “Analysis of Wood Diaphragms and Trusses—Part I: Diaphragms,” Canadian Journal of Civil Engineering, Vol. 4, No. 3, 1977.
5.
Foschi, R. O., “Load‐Slip Characteristics of Nails,” Wood Science, Vol. 7, No. 1, July, 1974.
6.
Goodman, J. R., and Popov, E. R., “Layered Beam System with Interlayer Slip,” Journal of the Structural Division, ASCE, Vol. 94, No. ST11, Nov., 1968, pp. 2535–2547.
7.
Hiremath, G. S., “Analysis of Composite Action in Lumber Diaphragms,” thesis presented to the graduate faculty of Washington State University, at Pullman, Wash., in Aug., 1979, in partial fulfillment of the requirements of the degree of Master of Science.
8.
Hoyle, R. J., “Designing Wood Structures Bonded with Elastomeric Adhesives,” Proceedings, 29th Annual Meeting of the Forest Products Research Society, Portland, Oreg., June, 1975.
9.
Hoyle, R. J., and Dong, C. C., “Elastomeric Adhesive Properties—Shear Strength, Shear Modulus, Creep and Recover,” Wood and Fiber, Vol. 8, No. 2, 1975, pp. 96–106.
10.
Hoyle, R. J., and Hsu, J. K., “Shear Strength and Shear Modulus of an Elastomeric Adhesive Subjected to Repeated Stress,” Wood Science, Vol. 11, No. 2, 1978.
11.
Hoyle, R. J., and McGee, D. W., “Design Methods for Elastomeric Adhesive Bonded Joist‐Deck System,” Wood and Fiber, Vol. 6, No. 2, 1974.
12.
Hsu, J. K., and Hoyle, R. J., “Factors Affecting Measurement of Shear Modulus for an Elastomeric Construction Adhesive,” Wood Science, Vol. 10, No. 3, 1978.
13.
Itani, R. Y., and Brito, F. A., “Elastomeric Bonded Wood Beams with Transverse Gaps,” Journal of the Structural Division, ASCE, Vol. 104, No. ST10, Oct., 1978, pp. 1595–1609.
14.
Itani, R. Y., and Hiremath, G. S., “Partial Composite Action in Diaphragms,” Journal of the Engineering Mechanics Division, ASCE, Vol. 106, No. EM4, Aug., 1980, pp. 739–752.
15.
Itani, R. Y., Morshed, H. M., and Hoyle, R. J., “Experimental Evaluation of Composite Action,” Journal of the Structural Division, ASCE, Vol. 107, No. ST3, Proc. Paper 16140, Mar., 1981, pp. 551–565.
16.
Johnson, J. W., “Lateral Tests of Wood Roof Sections Sheathed with Lodgepole Pine Decking,” Forest Products Journal, Vol. 29, No. 1, 1979.
17.
Johnson, J. W., “Roof Diaphragms with 3‐inch Decking, Effect of Adhesive and Openings,” Report T‐25, Forest Research Laboratory, School of Forestry, Oregon State University, Corvallis, Oreg., July, 1968.
18.
Ko, M. F., “Layered Beam System with Interlayer Slip,” thesis presented to the Colorado State University, (Department of Civil Engineering), at Fort Collins, Colo., in Dec., 1972, in partial fulfillment of the requirements for the degree of Master of Science.
19.
Kuenzi, E. W., and Wilkinson, T. L., “Composite Beams—Effect of Adhesive or Fastener Rigidity,” FPL 152, Forest Products Laboratory, U.S. Department of Agriculture, 1971.
20.
Newmark, N. M., Siess, D. P., and Viest, I. M., “Tests and Analysis of Composite Beams with Incomplete Interaction,” Proceedings, Society of Experimental Stress Analysis, Vol. 19, No. 1, 1951.
21.
Vanderbilt, M. D., Goodman, J. R., and Griswell, M. E., “Service and Overload Behavior of Wood Joist Floor System,” Journal of the Structural Division, ASCE, Vol. 100, No. ST1, Jan., 1974, pp. 11–29.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 109 • Issue 2 • February 1983
Pages: 369 - 385
Copyright
Copyright © 1983 ASCE.
History
Published online: Feb 1, 1983
Published in print: Feb 1983
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.