参数增量变化分析在斜拉桥换索施工控制中的应用

斜拉桥换索施工控制需要在整个施工过程中对索力、主梁标高、主梁和桥塔应力等参数进行控制,通过建模计算分析,将参数增量变化分析方法运用于皎平渡斜拉桥换索工程实践中。结果表明,换索后斜拉索实测和设计索力误差控制在3%以内;主梁标高变化最大值为4~5 mm,经过换索桥面线形有所优化。参数增量变化分析法可用于混凝土斜拉桥换索工程施工控制。

Application of Parameter Increment Variation Analysis to Construction Control of Cable Replacement of Cable-Stayed Bridges

In the construction control of cable replacement of a cable-stayed bridge,it is required that the parameters of the cable force,main girder elevation,main girder and pylon stress should be well controlled in the whole construction process.On the basis of the modeling,calculation and analysis,the parameter increment variation analysis method was applied to the construction of the cable replacement of the Jiaopingdu Cable-Stayed Bridge.The results show that after the cables of the Bridge are repleced,the erro...