大跨度悬索桥丝股架设线形计算的精确方法

摘要

根据悬索桥的施工特点及实际施工情况，探讨了悬索桥丝股架设线形计算的精确方法；分析了悬索桥丝股架设时索鞍的最佳平衡条件，建立了丝股架设时索鞍的理想位置——预偏量的理论计算方法。本文的方法不存在用有限元法计算时的那种假设误差，它根据力学平衡条件和变形相容条件确定各部分的索力和曲线形状，自动计入了索曲线的所有非线性，与有限元法相比，计算精度大为提高。%According to the conditions and practices of suspension bridge erection, a method is proposed for accurate calculation of erecting curves of wire strands of long suspension bridges. By analyzing the conditions of equilibrium on the saddles while the wire strands are being erected, the theoretical calculation method of the pre-displacement, which is the desired position of saddles, is developed. The proposed method takes the non-linearity of the wires into consideration, avoids the errors resulted by suppositions in finite element method, and is more accurate than finite element method.