A flexural-torsional buckling theory was developed herein for arches of monosymmetric cross section. The governing differential equations have been derived using the principle of minimum total potential energy. A special emphasis was placed during the derivatioln process on the methodology to maintain a consistent degree of approximation of the curvature effect. Closed form solutions were obtained for arches subjected to equal and opposite end moments (uniform bending), and to uniformly distributed radial loads (uniform compression). The method of assumed mode was used in determining the buckling loads with or without prebuckling in-lane deformation. Comparative studies with others have shown that the present study gives more accurate computation of buckling strength. It has been shown from the examination of the mode shapes and the computed buckling strength that unlike the case of doubly symmetric cross section, the buckling strength of monosymmetric arches is characterized bythe Wagner constant.
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