A Finite Element Analysis of Bearing Resistance of Timber Loaded through a Steel Plate

Awaludin A., Hirai T., Hayashikawa T., Leijten A.J.M.




Abstract


Decrease projected length of bolts due to bending deformation in timber joints compresses the steel washers onto timber member and increases lateral resistance of the joints. As this lateral strength increase primarily depend on bearing characteristics of timber beneath the steel washers, a finite element analysis was performed to predict their bearing-embedment behavior. A 3-D finite element model consisting of 8-node solid and contact pair elements was developed using ANSYS assuming an anisotropic plasticity model for timber and an elastic-perfectly plastic model for the washers. Material constants for both steel washer and timber member were obtained from previous test data. The results of the analysis were in good agreement with the experimental load-embedment curves as well as the analytical curves obtained in a previous study based on a rigid-body-spring-model. The same approach was also used to evaluate the effective bearing length (under uniform compression) of a 50 mm depth timber block partially compressed.


Keywords


Bearing resistance, contact condition, effective bearing length, finite element model, partial compression.

References


  1. Awaludin, A., Hirai, T., Hayashikawa, T., Sasaki, Y. and Oikawa, A., Effects of Pretension in Bolts on Hysteretic Response of Moment-carrying Timber Joints, Journal of Wood Science, 54, 2008, pp. 114-120.
  2. Awaludin, A., Hayashikawa, T., Oikawa, A., Hirai, T., Sasaki, Y., and Leijten, A.J.M, Seismic Properties of Moment-resisting Timber Joints with a Combination of Bolts and Nails, Civil Engineering Dimension, 13(1), 2011, pp. 1-5.
  3. Awaludin, A., Hirai, T., Sasaki, Y., Hayashikawa, T., Oikawa, A., Beam-to-column Timber Joints with Pretensioned Bolts, Civil Engineering Dimension, 13(2), 2011, pp. 59-64.
  4. Hirai, T., Nonlinear Load-slip Relationship of Bolted Wood-Joints with Steel Side-Member II: Application of the Generalized Theory of a Beam on an Elastic Foundation, Mokuzai Gakaishi, 29, 1983, pp. 839-844.
  5. Schreyer, A.C., Monotonic and Cyclic Behavior of Slender Dowel-type Fasteners in Wood-steel-wood Connections. M.A.Sc. Thesis, Department of Wood Science, The University of British Columbia, 2002.
  6. Awaludin, A., Hirai, T., Hayashikawa, T., Sasaki, Y., Load-carrying Capacity of Steel-to-timber Joints with a Pretensioned Bolt, Journal of Wood Science, 54, 2008, pp. 362-368.
  7. Hirai, T., Tsujino, T., Sasaki, Y., Steel Washer on Timber, Proceedings of World Conference on Timber Engineering, August 6-10, Portland, 2006. (CD-ROM)
  8. Inayama, M., Theory of Embedment of Timber and its Application, Ph.D. Thesis, The University of Tokyo, 1991.
  9. Kawamoto, N. and Kanaya, N., Elastic Defor-mation of Wood Subjected to Compression Perpendicular-to-the-grain. Effects of Length and Depth of Specimen, and Effect of Contact Length of Bearing Plate on an Elastic Foundation, Mokuzai Gakaishi, 37, 1991, pp. 16-23.
  10. Leijten, A. J. M., Larsen, H. J., Van der Put T. A. C. M., Structural Design for Compression Strength Perpendicular to the Grain of Timber Blocks, Journal of Construction and Building Materials, 24, 2010, pp. 252-257.
  11. Swanson Analysis System Inc., ANSYS v.10., Swanson Analysis System Inc., Houston, Pa, 1996.
  12. Awaludin, A., Toshiro Hayashikawa, T., Hirai, T., Sasaki, Y., Loading Resistance of Bolted Timber Joints beyond their Yield-loads, Proceedings of the 2nd ASEAN Civil Engineering Conference, March 11-12, Vientiane, 2010, pp. 148-158.
  13. Moses, D. M., Prion, H. G L., A Three-dimensi-onal Model for Bolted Connection in Wood, Canadian Journal of Civil Engineering, 30, 2003, pp. 555-567.
  14. Blass, H. J., and Gorlacher, R., Compression Perpendicular to the Grain, Proceedings of World Conference on Timber Engineering, June 14-17, Finland, 2004. (CD-ROM)
  15. American Society for Testing and Materials: Standard test methods for small clear specimens of timber, ASTM D143, American Society of Testing and Materials, Philadelphia, 1994.
  16. Madsen, B., Proposal for Including an Updated Design Method for Bearing Stresses in CIB-W18 Structural Design Code, Proceedings of the 22nd CIB-W18, Berlin, 1989.
  17. Riberholt, H., Compression Perpendicular to the Grain of Wood, COWI-report P-42239-1, 2000.


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