Out-of-plane elastic buckling analysis of box-section arches with lateral bracings

ZHAO Siyuan; GUO Yanlin; WANG Hong

doi:10.16511/j.cnki.qhdxxb.2016.21.062

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Journal of Tsinghua University(Science and Technology) ›› 2016, Vol. 56 ›› Issue (9) : 980-984. DOI: 10.16511/j.cnki.qhdxxb.2016.21.062

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Out-of-plane elastic buckling analysis of box-section arches with lateral bracings

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Abstract

Arches are usually arranged with lateral bracings to improve their out-of-plane stability. The out-of-plane elastic buckling of box-section arches was analyzed with a single lateral bracing on the crown. The energy method was used to derive the formulas for the out-of-plane buckling loads on lateral braced box-section arches for uniform compression or uniform bending. Then, the out-of-plane elastic buckling solution for arches with no lateral bracings was used to derive the threshold stiffness of the lateral bracings. The out-of-plane buckling loads and threshold stiffnesses of the lateral bracings given by this method agree well with finite element results and can be applied to calculate the the out-of-plane inelastic strength of box-section steel arches with lateral bracings.

Key words

steel arches / elastic buckling / out-of-plane / brace / energy method / threshold stiffness

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ZHAO Siyuan, GUO Yanlin, WANG Hong. Out-of-plane elastic buckling analysis of box-section arches with lateral bracings[J]. Journal of Tsinghua University(Science and Technology). 2016, 56(9): 980-984 https://doi.org/10.16511/j.cnki.qhdxxb.2016.21.062

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