递推最小二乘法在桥梁线形预测和调整中的应用  

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

作　　者：桂玉枝[1] 唐云清[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《现代交通技术》2010年第1期40-43,共4页Modern Transportation Technology

基　　金：国家"863"计划资助(编号:2007AA11Z106);西部交通建设科技项目(编号:200631822327)

摘　　要：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。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 method is suitable for forecast formwork elevation.

关 键 词：桥梁工程 施工监控 递推最小二乘法 线形预测 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]