Dynamic reduction coefficients of steel-concrete composite beam based on Timoshenko beam theory

被引：0
|
作者：
Sun Q.-K. [1 ]
Zhang N. [1 ]
Liu X. [1 ]
Zhou Z.-J. [1 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2023年 / 53卷 / 02期
关键词：
analytical expression; bridge engineering; dynamic reduction coefficient; shear deformation; shear slip; steel-concrete composite beam;
D O I：
10.13229/j.cnki.jdxbgxb20210742
中图分类号：
学科分类号：
摘要：
The motion differential equation of steel-concrete composite beams considering the shear slip effect was derived based on the Timoshenko beam theory. And the analytical expressions of eigenfrequencies and modes for simply-supported steel-concrete composite beams were obtained. The dynamic reduction coefficients which were more suitable for dynamic analysis of steel-concrete composite beams were proposed，and the analytical expressions of stiffness reduction coefficient" and "frequency reduction coefficient" were given. Then the dynamic reduction coefficients were compared with the existing one based on Euler-Bernoulli beam theory. The effects of shear connector stiffness，shear deformation，rotary inertia，and span-to-depth ratio on the frequency reduction coefficient were discussed. The results show that the effect of the rotary inertia can be ignored，but that of the shear deformation must be considered in the dynamic analysis of steel-concrete composite beams with smaller span-to-depth ratios. © 2023 Editorial Board of Jilin University. All rights reserved."
引用
收藏
页码：488 / 495
页数：7
相关论文
共 18 条
  • [1] Nie Jian-guo, Yu Zhi-wu, Research and practice of composite steel-concrete beams in China, China Civil Engineering Journal, 32, 2, pp. 3-8, (1999)
  • [2] Nie Jian-guo, Tao Mu-xuan, Wu Li-li, Et al., Advances of research on steel-concrete composite bridges, China Civil Engineering Journal, 45, 6, pp. 110-122, (2012)
  • [3] Liu Yong-jian, Liu Jiang, Review on temperature action and effect of steel-concrete composite girder bridge, Journal of Traffic and Transportation Engineering, 20, 1, pp. 42-59, (2020)
  • [4] Nie Jian-guo, Shen Ju-min, Yu Zhi-wu, A reduced rigidity method for calculating deformation of composite steel-concrete beams, China Civil Engineering Journal, 28, 6, pp. 11-17, (1995)
  • [5] Wang Jing-quan, Lv Zhi-tao, Liu Zhao, Consistency factor method for calculating deformation of composite steel-concrete girders with partial shear connection, Journal of Southeast University (Natural Science Edition), 35, pp. 5-10, (2005)
  • [6] Xu Rong-qiao, Chen De-quan, Modified reduced stiffness method for calculating the deflection of composite beams, Engineering Mechanics, 30, 2, pp. 285-291, (2013)
  • [7] Zhang Yun-long, Liu Zhan-ying, Wu Chun-li, Et al., Static and dynamic responses of steel-concrete com posite beams, Journal of Jilin University (Engineering and Technology Edition), 47, 3, pp. 789-795, (2017)
  • [8] Hou Zhong-ming, Xia He, Zhang Yan-ling, The influence of the shear stiffness of stud connectors on the natural vibration characteristics of steel-concrete composite beams, China Railway Science, 33, 6, pp. 24-29, (2012)
  • [9] Hou Zhong-ming, Xia He, Wang Yuan-qing, Et al., Dynamic redution coefficients for a steel-concrete composite beam, Journal of Vibration and Shock, 34, 4, pp. 74-81, (2015)
  • [10] Zhang Yun-long, Guo Yang-yang, Wang Jing, Et al., Natural frequency and mode of vibration of steel-concrete composite beams, Journal of Jilin University (Engineering and Technology Edition), 50, 2, pp. 581-588, (2020)
12