【摘要】 在计入轴力对拱屈曲的影响后 ,建立了固支圆拱在垂直分布荷载 g0 /cos2 θ作用下屈曲的总势能 .按 Ritz法求得在该荷载作用下具有足够工程精度的固支圆拱正对称失稳临界力的近似值 .并与固支圆拱受径向均布荷载正对称失稳情况作对比 ,得到了一些可供参考的结果更多还原

【Abstract】 After taking the effect of axis force on bending into consideration,the general potential energy of small bending for the circular arch is established under vertical distributive load g 0/ cos 2 θ .With sufficient engineering precision,the approximations of the symmetrical destabilizing critical load for the circular arch supported fixedly are calculated by Ritz method,and are contrasted with the critical load for the circular arch under radial uniform load.Some referential results are obtained.更多还原