悬索桥主缆线形的鞍座影响

提出了一个基于数值解析法的悬索桥主缆线形计算方法,能全面考虑各种鞍座影响,可用于成桥状态、空缆状态和施工阶段等各阶段的主缆线形分析。通过算例分析了鞍座对主缆线形的影响,计算表明,由于直接约束着主缆的变形,鞍座对主缆线形,特别是施工阶段的主缆线形有较大的影响。计算还表明,本文方法具有考虑因素全面、计算精度高、速度快、使用方便等优点。

Effect of Saddle on Cable Shape of Suspension Bridges

Based on numericalanalytical method, an algorithm is proposed to take account of the comprehensive effect of various saddles on cable shape of suspension bridges. The program developed according to this method can be used to analysis the cable shape of bridge completion stage, cable finished stage and construction stage. The effect of saddle on cable shape is demonstrated by a numerical example, which indicated that saddles affect markedly the shape of main cables, especially in construction stage, because saddle restraints directly the deformation of main cables.The proposed method also shows high accuracy,efficiency and conveniency,while taking account of all factors that effect the cable shape.