【摘要】 从能量原理的 Ritz- Tim oshenko法出发 ,推导出了变截面空心薄壁桥墩的稳定临界力的计算方法。主要研究了一端固支一端自由和一端固支一端链杆铰支两种边界条件情况 ,提出了失稳临界荷载的计算公式 ,并通过算例验证了公式的计算精度能满足设计需要更多还原

【Abstract】 The stability of non prismatic thin walled box piers is studied in this paper On the basis of Ritz Timoshenko method of energy approach, the solutions of two conditions are proposed One condition is the piers with a fixed end and a free end, and the other is the piers with a fixed end and a hinger end The equations of critical load are deducted Last, an example is calculated and the results are in good agreement with the finite element method更多还原