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针对已有计算方法存在的不足之处,提出了一种大跨度悬索桥结构构件的无应力尺寸及鞍座、索夹的预偏量等架设参数的精细算法。该法考虑了二期恒载由主缆和加劲梁共同承担的实际情况;应用了小应变弹性悬链线单元、CR列式法梁单元,精确方便地模拟了鞍座及鞍座与主缆相切点的运动,通过迭代方法得到架设参数。江阴长江大桥架设参数计算的应用实例表明该法具有较高的精度。
Aiming at the shortcomings of the existing calculation methods, a precise algorithm of setting parameters such as the stress-free dimension of the structural members of long-span suspension bridges and the pre-deflections of saddles and saddles is proposed. The method takes into account the fact that the second-stage dead load is shared by the main cable and the stiffening girder. The small strain elastic catenary unit and the CR-type beam unit are used to simulate the saddle and the saddle and the main cable Tangent point of the movement, through the iterative method to get erection parameters. The application example of Jiangyin Yangtze River Bridge erecting parameters shows that the method has higher accuracy.