【摘要】 运用拱的挠度理论 ,推导出考虑结构几何非线性影响的控制微分方程 ;应用样条配点法 ,以三次B样条函数为位移试函数 ,导出了拱结构非线性内力分析的新方法。针对某特大跨度钢管混凝土拱桥进行了数值对比分析 ,计算结果表明 ,该方法的计算精度与效率令人满意更多还原

【Abstract】 Based on the large deflection theory of arch bridge, the authors use spline finite point method to analyze the geometric nonlinear internal force of arch structure. With the cubic B spline functions treated as displacement functions, a new method is derived. The result is compared with that of the finite element method. Numerical examples show that this method is better than other quadrature method and the solution of the problem is satisfactory. They have provided the theoretical basis for the construction of the long span arch bridge.更多还原