递推最小二乘法在桥梁线形预测和调整中的应用

由于施工过程中桥梁施工工况和设计理想状态有所差别，须采用反馈分析方法进行桥梁线形预测与调整。结合某桥主桥上部结构施工监控，介绍了递推最小二乘法在该桥施工过程中的线形预报与调整中的应用，选取混凝土弹性模量、混凝土徐变系数、有效预应力系数作为主要设计参数开展重点辨识，建立参数调整向量、线性变换向量和加权系数矩阵用以调整立模标高。结果表明，采用该方法能满足悬臂施工之后体系转换的合龙精度要求。

Application of Recursive Least-square Method in Forecasting and Elevation of Bridge Linetype

Due to condition difference in design and construction,feelback analysis method is necessary for bridge linetype adjusting during construction. To forecast formwork elevation for a large continuous box beam bridge,recursive least-square method is adapted,and elastic modules,concrete creep coefficient and effective pre-stress coefficient are selected as main analysis parameters,and parameter adjusting vector,linear transfer vector and weighted coefficient vector are established. It is indicated that the meth...