Out-of-plane elastic buckling analysis of box-section arches with lateral bracings
ZHAO Siyuan1,2, GUO Yanlin1, WANG Hong2
1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China;
2. China Construction Steel Structure Corp. Ltd., Shenzhen 518000, China
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.
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