自锚式悬索桥架设参数确定及其施工过程模拟

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1、摘要近年来，自锚式悬索桥在我国修建越来越多，并向着更大跨径、更大规模的方向发展。为了确保自锚式悬索桥安全、准确就位，同时也为了配合施工的需要，自锚式悬索桥的结构分析与施工控制技术倍受关注。本文对已有悬索桥分析理论(弹性理论、挠度理论和有限位移理论)进行了综述比较，选用其中较为先进、精度高、适用范围广的有限位移理论，结合改进的cR列式法对自锚式悬索桥进行分析，推导了梁、杆、悬索以及带刚臂悬索单元的切线刚度矩阵，建立了考虑鞍座顶推，鞍座的切点变化，临时支座退出工作和施工工序的理论模型。基于合理的施工分析模型，进一步讨论了吊杆张拉方案的确定和施工偏差的调整

2、。自锚式悬索桥加劲梁的受力与吊索拉力直接相关，同斜拉桥一样，它也存在合理成桥内力状态的确定问题，本文研究提出用刚性支承连续梁法和最小弯曲能量法确定自锚式悬索桥的合理成桥内力状态。将成桥状态吊索力、吊索r索夹)位置、加劲梁位置、主缆线形、鞍座位置等架设参数作为迭代目标，运用增量迭代混合法和架设参数假设计算比较法，结合施工前进分析笔者编写了自锚式悬索桥设计与结构分析程序，通过大量算例考证了本程序，并对佛山平胜大桥进行了架设参数的确定和施工过程的分析计算。关键词：自锚式悬索桥；几何非线性：鞍座模拟：带刚臂悬索单元；架设参数施工过程ABSTRACTSelf-

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