索—塔—梁耦合作用下的斜拉桥侧倾稳定研究

Research of Lateral Buckling Stability of Cable-stayed Bridges under Cable-pylon-girder Coupling

本文用能量变分方法导出了索、塔与梁耦合作用下的单索面斜拉桥侧倾稳定的计算公式，建立了由拉索、桥塔和主梁所组成的斜拉桥系统的稳定分析实用计算方法。并通过分析比较，从理论上论述了斜拉桥单个杆件稳定与整个系统稳定的关系，揭示了将斜拉桥作为一个系统进行侧倾稳定分析的必要性和重要性。

In this paper, the lateral buckling stability calculation formulas of cable-stayed bridges with single cable plane under cable-pylon-girder coupling based on energyapproach is deduced and a practical method for lateral buckling stability analysis of a cable-stayed bridge system composed of cables,pylons and girders is proposed.Furthermore,therelation in buckling stability between a single member and the whole system of cable-stayedbridges is discussed theorectically. The necessity and importance of lateral buckling analysistaking cable-stayed bridge as a whole is shown.