Wood Beams Under Impact Load

by Borislav D. Zakic, Head of Testing Struct. Dept.; Inst. for Materials Testing, Beograd, Yugoslavia; formerly, Research Assoc., Civ. Engrg. Dept., Univ. of California, Berkeley, Calif.,

Serial Information: Journal of the Structural Division, 1979, Vol. 105, Issue 7, Pg. 1489-1507

Document Type: Journal Paper


An analysis of the behavior of glue-laminated wood beams under impact load in the elastic and plastic range is presented. The theoretical part of the study consists of the definition of the general methodology of solving the vibration of the system with a nonlinear ratio between force and deformations. The validity of the vibration design is verified by a testing program using full-size specimens. The test results obtained agree favorably with the theoretical predictions. There is good coincidence in the elastic range between the actual and theoretical dynamic characteristics. There is a discrepancy between measured deformations under static and dynamic load in the plastic range. The theoretical dynamic characteristies with and without damping coincide well with the corresponding real dynamic characteristics and the theoretical method given may be used in the plastic range.

Subject Headings: Wood beams | Elastic analysis | Impact loads | Elastoplasticity | Vibration | Plastics | Plastic analysis | Material properties

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