DETERMINATION OF THE DYNAMIC CHARACTERISTICS OF STRUCTURAL MATERIALS BASED ON THE RESULTS OF MODEL TESTS
https://doi.org/10.33979/2073-7416-2022-102-4-52-63
Abstract
The paper studies methods for obtaining dynamic characteristics (dynamic modulus of elasticity, loss coefficient) of structural materials, such as concretes and cement mortars, based on the results of experimental modal analysis. Closed expressions for determining the loss coefficient of mechanical vibrations are presented, obtained from solving differential equations of vibrations of single-mass systems, which are caused by vibrations of extended structures in the first forms. The procedure of modal analysis of short beams made of test samples of structural materials is presented. The procedure for calculating the natural frequencies of the first forms of vibration of beams is presented. Based on the solution of the equation, a formula is presented for determining the damping coefficients and the dynamic modulus of elasticity of the beam material.
About the Author
Vladimir A. Smirnov
Research Institute of Building Physics (NIISF RAASN); National Research Moscow University of Civil Engineering
Russian Federation
Russian Federation
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Review
For citations:
Smirnov V.A. DETERMINATION OF THE DYNAMIC CHARACTERISTICS OF STRUCTURAL MATERIALS BASED ON THE RESULTS OF MODEL TESTS. Building and Reconstruction. 2022;(4):52-63. (In Russ.) https://doi.org/10.33979/2073-7416-2022-102-4-52-63
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