空间索面的自锚式悬索桥主梁稳定简化计算研究

自锚式悬索桥在荷载作用下,主梁端部承受主缆巨大的水平分力作用,为压弯构件,其稳定是个十分重要的问题。根据弹性支承梁屈曲失稳简化计算方法,推导了适用于空间索面的自锚式悬索桥主梁屈曲失稳简化计算公式,并以江东大桥为例,分别用简化计算方法和有限元法分析主梁稳定,在恒载下两种方法得到的失稳安全系数很接近,且简化公式计算偏于安全,验证了公式的可行性。

A Study on Simplified Calculation Method for Main Girders Stability of Self-Anchored Suspension Bridges with Spatial Cables

Under the gravity loading,the main girders of a self-anchored suspension bridge are subjected to a great compression force horizontally introduced by the main cables and the behavior of the girders is like that of beam-columns,so that their instability is a key issue in design of the self-anchored suspension bridge.On the basis of the buckling design principle of a strut with lateral elastic restraints,a simplified calculation method to assess buckling resistance of the main girders of the self-anchored sus...