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原文传递 Flexural-Torsional Buckling of Steel Arches under a Localized Uniform Radial-Load Incorporating Shear Deformations

题名：	Flexural-Torsional Buckling of Steel Arches under a Localized Uniform Radial-Load Incorporating Shear Deformations
正文语种：	英文
作者：	Hanwen Lu, Ph.D.1; Airong Liu2; Yong-Lin Pi3; Yonghui Huang4; Mark Andrew Bradford, Dist.M.ASCE5; Jiyang Fu6
作者单位：	1Guangzhou University–Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou Univ., Guangzhou 510006, China. 2Professor, Guangzhou University–Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou Univ., Guangzhou 510006, China (corresponding author). 3Professor, Guangzhou University–Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou Univ., Guangzhou 510006, China; Centre for Infrastructure Engineering and Safety, Univ. of New South Wales Sydney, Sydney, NSW 2052, Australia. 4Associate Professor, Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou Univ., Guangzhou 510006, China. 5Scientia Professor, Centre for Infrastructure Engineering and Safety, Univ. of New South Wales Sydney, Sydney, NSW 2052, Australia. 6Professor, Guangzhou University–Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou Univ., Guangzhou 510006, China.
关键词：	Localized uniform radial load; Flexural-torsional buckling; Boundary rotational restraints; Shear deformations; Steel arches
摘要：	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.
出版年：	2019
期刊名称：	Journal of Structural Engineering
卷：	145
期：	10
页码：	1-14