|Table of Contents|

[1] Cai Yong, Xie Jiawei,. Stability of columns with original defectsunder periodic transient loadings [J]. Journal of Southeast University (English Edition), 2017, 33 (1): 64-69. [doi:10.3969/j.issn.1003-7985.2017.01.011]

Stability of columns with original defectsunder periodic transient loadings()

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

2017 1
Research Field:
Civil Engineering
Publishing date:


Stability of columns with original defectsunder periodic transient loadings
Cai Yong Xie Jiawei
School of Civil Engineering, Central South University, Changsha 410075, China
periodic transient loading parametric resonance original defect dynamic stability
To study the influence of original defects on the dynamic stability of the columns under periodic transient loadings, the approximate solution method and the Fourier method of the stable periodic solution are adopted while considering the influence of original defects on columns.The dynamic stability of the columns under periodic transient loadings is analyzed theoretically.Through the study of different deflections, the dynamic instability of the columns is obtained by Maple software. The results of theoretical analysis show that the larger the original defects, the greater the unstable area, the stable solution amplitude of columns and the risk of instability caused by parametric resonance will be. The damping of columns is a vital factor in reducing dynamic instability at the same original defects. On the basis of the Mathieu-Hill equation, the relationship between the original defects and deflection is deduced, and the dynamic instability region of the columns under different original defects is obtained. Therefore, reducing the original defects of columns can further enhance the dynamic stability of the compressed columns in practical engineering.


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Biography: Cai Yong(1968—), male, doctor, associate professor, caiyong@csu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51078354).
Citation: Cai Yong, Xie Jiawei. Stability of columns with original defects under periodic transient loadings[J].Journal of Southeast University(English Edition), 2017, 33(1):64-69.DOI:10.3969/j.issn.1003-7985.2017.01.011.
Last Update: 2017-03-20