Vibration of Steel–Concrete Composite Beams Using the Timoshenko Beam Model

Author:

Berczyński Stefan1,Wróblewski Tomasz2

Affiliation:

1. Institute of Manufacturing Engineering, Technical University of Szczecin, Piastów 19, 70-310 Szczecin, Poland

2. Department of Theory of Structure, Technical University of Szczecin, Piastów 50, 70-311 Szczecin, Poland

Abstract

In this paper we present a solution of the problem of free vibrations of steel–concrete composite beams. Three analytical models describing the dynamic behavior of this type of constructions have been formulated: two of these are based on Euler beam theory, and one on Timoshenko beam theory. All three models have been used to analyze the steel–concrete composite beam researched by others. We also give a comparison of the results obtained from the models with the results determined experimentally. The model based on Timoshenko beam theory describes in the best way the dynamic behavior of this type of construction. The results obtained on the basis of the Timoshenko beam theory model achieve the highest conformity with the experimental results, both for higher and lower modes of flexural vibrations of the beam. Because the frequencies of higher modes of flexural vibrations prove to be highly sensitive to damage occurring in the constructions, this model may be used to detect any damage taking place in such constructions.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Aerospace Engineering,Automotive Engineering,General Materials Science

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