钢-混凝土组合梁的固有频率及其振型

doi:10.13229/j.cnki.jdxbgxb20181007

Abstract

Abstract:

In order to accurately analyze the frequency and mode shape of steel-concrete composite beam considering the shear-slip effect, the displacement function of the steel-concrete composite beam is proposed according to the basic idea of classical dynamics and the bond slip theory. Based on the energy method, the free vibration equation of composite beam considering shear-slip effect is derived and the natural frequency and its mode shape are obtained, which solves the problem of considering shear-slip at the interface of steel-concrete composite beam. The frequency and mode shape of the testing beam are measured by laboratory test, and the simulation analysis of steel-concrete composite beams is carried out based on ANSYS. The measured value and simulation value are compared with the theoretical solution. The results show that the theoretical solution of the frequency and mode shape of the steel-concrete composite beam is correct and reasonable considering the shear-slip effect. It is very necessary to take the shear-slip effect into consideration in the practical composite beam engineering.

Key words: road transport, bridge engineering, composite beam, free vibration, shear slip effect

CLC Number:

U441

Yun-long ZHANG,Yang-yang GUO,Jing WANG,Dong LIANG. Natural frequency and mode of vibration of steel⁃concrete composite beam[J].Journal of Jilin University(Engineering and Technology Edition), 2020, 50(2): 581-588.

Figures/Tables 9

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项目	固有频率/Hz	误差/%
理论解	55.00	2.00
ANSYS解	56.55	0.76
实测值	56.12	—

Natural frequency and mode of vibration of steel⁃concrete composite beam

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