顶推连续梁桥监控中参数识别问题研究

The Research of Parameter Identification in Continuous Bridge with Incremental Launching Construction

以湖南常德一座大跨度顶推施工连续梁为工程背景,介绍施工监控中一种基于二分法的自适应参数识别方法。该方法以顶推走梁过程中墩顶最大水平正位移为控制条件,解决了连续梁顶推施工监控中参数识别较难的问题,并在该工程实践中得到良好应用。取得非常好的效果,能为以后顶推方法施工桥梁监控中的参数识别问题提供参考。

In the background of a large span of continuous bridge with incremental launching construction in Changde Hunan, an self-adaptive method of parameter identification is introduced which is based on the dichotomy method. As a critical condition of the largest positive displacement in the top of the pier when the girder is moving, the method successfully solves the difficult problem of parameter identification of continuous bridge with incremental launching construction. When used in the construction of the bridge in Changde, the method is got a big success and will be an reference to parameter identification of bridge with incremental launching construction.