Flexural-Torsional Buckling of Steel Arches under a Localized Uniform Radial-Load Incorporating Shear Deformations
Publication: Journal of Structural Engineering
Volume 145, Issue 10
Abstract
This paper concentrates on the laterally flexural-torsional buckling analysis incorporating shear deformations for elastic steel circular arches having boundary rotational restraints under a localized uniform radial load, which has not been reported in the literature. The localized uniform radial load and elastic restrained boundaries produce complex nonuniform shear force, axial force, and bending moment in an arch, which need to be considered in the flexural-torsional buckling analysis of the arch. Therefore, the in-plane elastic analysis is carefully performed to derive exact prebuckling shear force, axial force, and bending moment based on which the analytical solutions of the critical value of localized uniform radial load for flexural-torsional buckling of elastic steel arches are derived. Comparisons show that analytical solutions agree extremely well with finite element results. The influences of various factors on the flexural-torsional buckling are studied. The localized loading segment length and/or the elastic stiffness of boundary rotational restraints are found to have significant influences on the flexural-torsional buckling load. The buckling load decreases with a decrease in the stiffness of the rotational restraints and with a decrease in the loading segment length. The influence of shear deformations on the flexural-torsional buckling load is also investigated, and the results show that shear deformations reduce the critical flexural-torsional buckling loads for arches with a medium and small slenderness ratio.
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Acknowledgments
The research for this paper was financially supported by the National Natural Science Foundation of China (Grant No. 51878188), Technology Planning Project of Guangdong Province (Grant No. 2016B050501004), and Technology Planning Project of Guangzhou City (Grant No. 201807010021). The authors are grateful for this support.
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Published In
Journal of Structural Engineering
Volume 145 • Issue 10 • October 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 20, 2018
Accepted: Mar 7, 2019
Published online: Aug 15, 2019
Published in print: Oct 1, 2019
Discussion open until: Jan 15, 2020
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