Abstract: In this paper, an approximate analytical solution for lateral stability of open tied arch bridge is developed. The method is based on approximate displacement functions and initial stress method. The results of the analytical method are shown to agree quite well with those of the finite element method, and the method will be quite convenient to use.

Key words: open tied arch, lateral stability, energy principle, elasticity, practical method

摘要： 本文提出了敞开式系杆拱桥面外弹性稳定的实用计算方法,假定失稳的近似函数,运用初应力法,求得了敞开式系杆拱桥面外失稳的近似解析解。计算结果表明,该方法与有限元十分符合,使用方便。

关键词: 敞开式系杆拱, 面外稳定, 能量原理, 弹性, 实用方法