灰色理论在斜拉桥索力状态评估中的应用

Application of Grey Theory on Evaluation of Cable Force State of Cable-stayed Bridge

该文基于灰色系统中的灰色关联分析理论,建立了斜拉桥索面索力状态评估方法,并以某斜拉桥索力实测值为例进行计算分析,计算中将三种不同情况下的索力值作为灰色关联分析中的参考序列,进行对比分析。结果表明,灰色关联分析方法可较好地应用于斜拉桥索力状态评估;若能考虑混凝土收缩徐变等影响,则以优化索力作为灰色关联分析参考序列的评估结果能更好地反映索力实际状态。

Based on the grey relational analysis theory in the grey system, the article establishes the method of evaluating the plane cable force state of the cable-stayed bridge. Taking the measured value of the cable force of a cable-stayed bridge as an example, the calculation and analysis are done. In the course of calculation, the cable force values under three different conditions are taken into account as the reference sequence in the grey relational analysis to carry out the contrast and analysis. The results indicate that the grey relational analysis method can be better applied in the evaluation of the cable force state of the cable-stayed bridge. Moreover, if the influence of the concrete shrinkage creep can be considered, the evaluation results taking the optimized cable force as the reference sequence in the grey relational analysis can better reflect the actual state of the cable force.