利用正装迭代法确定斜拉桥合理施工状态

Cable-stayed Bridge Construction Condition Optimization Applying Forward-analysis Iterative Method

以某三跨预应力混凝土斜拉桥为工程背景,分析了利用正装迭代法确定合理施工状态过程中的关键问题。包括:确定合理成桥状态所需的控制参数、施工中几何非线性影响、支架脱空的模拟、索力影响矩阵及收敛性问题的讨论。计算结果表明,合理地考虑上述因素之后确定的合理施工状态,可以使最终的成桥状态与优化的合理成桥状态非常接近。证明此方法在斜拉桥工程计算中很大的实用价值。

Based on a PC cable-stayed bridge, the key points of forward-analysis iterative method is discussed, applying to determine the proper construction condition. Such as the control parameters to make proper construction condition, the geometric non-linear influence, the separate of supports during construction process, cable force influence matrix and the convergence discussion. After taking the above factors into consideration, the finished state approached the reasonable one. The method has great practical values in cable-stayed bridge engineering are proved.