Volume 23, Issue 2 (March 1995)
A Vibration-Based Method for Determining St. Venant Torsional and Warping Stiffnesses of Members with Open Cross-Sections
A dynamic mechanical property identification method is presented based on a study of composite wood members with an open I-shape cross-section. Besides the bending stiffness which is identified by a bending vibration test, St. Venant torsional stiffness GKs, and warping stiffness EKw are identified by a separate torsional modal analysis. Three kinds of typical I-shape beams have been tested and their properties identified. The approach is based on Euler beam theory and an earlier torsional vibration model developed by the authors.