Analytical Solution of Dynamic Characteristics of Steel-concrete Composite Beams Considering Shear Deformation

被引：0
作者：
Sun Q. [1 ]
Zhang N. [1 ]
Liu X. [1 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2023年 / 45卷 / 06期
关键词：
analytical solution; natural frequency; shear deformation; steel-concrete composite beam;
D O I：
10.3969/j.issn.1001-8360.2023.06.018
中图分类号：
学科分类号：
摘要：
Abstract; Considering the influence of the shear deformation of concrete slabs and steel beams and the relative slip at the interface between the two, the differential equations of motion of steel concrete composite beams were derived, and the natural frequencies and vibration modes of simply supported steel-concrete composite beams were obtained.The orthogonality of vibration modes was discussed.The assumption of independent shear angle of the sub beam, which is more consistent with the motion state of the composite beam, was adopted in the analysis model to improve the accuracy of frequency calculation.A comparative analysis was made on the theory proposed in this paper, Timoshenko composite beam theory assuming the same shear angle of the sub beam, Euler-Bernoulli composite beam theory, Ansys numerical analysis, and experimental test results.The results show that the theoretical calculation model proposed in this paper has higher accuracy than the other two theoretical calculation models.The effect of shear deformation on the dynamic performance of steel-concrete composite beams cannot be ignored, nor the shear angles of concrete slabs and steel beams can be assumed to be equal. © 2023 Science Press. All rights reserved.
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页码：161 / 168
页数：7
相关论文
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