关键词: 肋拱, 大跨径, 侧向稳定性

Abstract: In this paper, the authors investigate the lateral elastic buckling problem of a circular arch space system Composed of X-type double main arrh ribs with hinged or fixed ends and transverse bracing beams, loaded by uniformly distributed radial force. Employing the principle of the minimun potential energy, the analytic formulas of Critical buckling load qcr are obtained. Theoretical and numerical analyses show that the critical burkling load formulas given by this paper might be simply and conveniently used in design practice with Sufficient accuracy.

Key words: Rib arch, Large span, Lateral stability