组合梁斜拉桥的合理成桥索力计算方法研究

Research on the Determination Method of Reasonable Finished Cable Force of Composite Beam Cable-stayed Bridge

确定斜拉桥合理成桥状态下的索力是设计和计算分析的关键,以赤壁长江公路大桥为工程背景,对零位移法和不同设置参数下的最小弯曲能量法的电算结果进行分析和比较,探究适合组合梁斜拉桥合理成桥索力的初步确定方法。结果表明:最小弯曲能量法使塔梁抗弯惯性矩lyy缩小10 000倍的参数来计算,得到的合理成桥状态方案最优。

It is the key to determine the cable force of a cable-stayed bridge under reasonable completion condition.Taking a Yangtze River Highway Bridge as the engineering background, this paper analyzes and compares the results of the zero displacement method and the minimum bending energy method under different setting parameters to explore the preliminary determination method suitable for the reasonable completion cable force of the composite girder cable-stayed bridge.The results show that the minimum bending energy method reduces the bending inertia moment lyy of the tower girder by 10000 times, and the reasonable finished dead state is optimal.