Free vibration characteristics of steel-concrete composite beams considering the longitudinal stiffness distribution based on the energy method

被引：0
作者：
Sun Q. [1 ,2 ]
Zhang N. [1 ,2 ]
Liu X. [1 ,2 ]
Tao X. [2 ,3 ]
Zheng Y. [1 ]
Huo M. [1 ,2 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] State Key Laboratory for Track Technology of High-Speed Railway, Beijing
[3] Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 10期
关键词：
Longitudinal stiffness distribution; Natural frequency; Partition variational method; Relative slip; Steel-concrete composite beam;
D O I：
10.13465/j.cnki.jvs.2021.10.009
中图分类号：
学科分类号：
摘要：
In order to analyze the free vibration characteristics of steel-concrete composite beams considering the uneven longitudinal distribution of shear connectors or the variable cross-section, a governing differential equation of steel-concrete composite beams with relative slip was established based on the Hamilton principle and partition variational method. The calculation methods for free vibration characteristics under four boundary conditions, i. e., simple support-simple support, clamped-free, clamped-simple support and clamped-clamped, were presented. Taking two steel-concrete composite beams as examples, the fundamental frequencies and first-order mode shapes were calculated, then compared with the results of numerical analysis by ANSYS and test. The results show that they are basically identical and it is proved that the proposed method can be used effectively to analyze the free vibration characteristics of steel-composite beams with the longitudinal stiffness distribution. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：67 / 72and102
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