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本文介绍了一种连续斜拉桥静力分析的解析迭代法。桥塔允许存在一定的柔度,并考虑了塔与其支承物(沉箱或桩)的相互影响。将体系分成两个子结构:塔和加在索上的梁。借助三弯矩方程可以求解连续梁,而挠度可用傅里叶级数来计算。为求解整个体系,用少量的迭代循环及傅里叶系数就足够收敛,只需求解少量联立方程。因此,使用PC计算机就能分析在不同荷载情况下有大量斜索的桥梁体系。将本方法与非线性刚度法所获得的数值结果进行比较,证明了本方法的优点,同时也说明了非线性影响对于这类桥梁来说是不重要的。
This paper presents an analytical iterative method for static analysis of continuous cable-stayed bridges. The pylons allow for some flexibility and account for the interaction of the tower with its support (caisson or pile). The system is divided into two substructures: the tower and the added beam. The three-moment equations can be used to solve continuous beams, and the deflection can be calculated by Fourier series. To solve the whole system, with a small amount of iteration loop and the Fourier coefficient is sufficient convergence, only solve a small amount of simultaneous equations. Therefore, using a PC computer, it is possible to analyze a bridge system with a large number of diagonal cables under different load conditions. Comparing this method with the numerical results obtained by the nonlinear stiffness method proves the advantages of this method and also shows that the nonlinear effects are not important for such bridges.