基于高次最小二乘原理的连续刚构桥挠曲线拟合分析  

Analysis on Continuous Rigid-Frame Bridges Deflection Curve Fitting based on Higher Mode of Least Squares Principle

作　　者：刘大洋[1] 黄福伟[1,2] 禹鹏[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]重庆交通科研设计院,重庆400067

出　　处：《交通标准化》2013年第3期8-12,共5页Communications Standardization

基　　金：国家重点基础研究发展计划(973计划)项目课题(2012CB723807)

摘　　要：为充分利用连续刚构桥桥梁健康监测系统中有限数量位移传感器,提出一种基于高次最小二乘原理的数值拟合方法,用有限测点信息有效拟合全桥的挠曲线方程。以某连续刚构桥为实际算例,全桥挠曲线拟合分析结果表明:该方法拟合连续刚构桥挠曲线方法简单、思路清晰,有利于工程实践;在边跨和中跨的拟合值与实测值的最大相对误差均小于5%,用高次最小二乘原理拟合连续刚构桥挠曲线具有足够精度。In order to take full advantage of limited displacement sensor in continuous rigid-frame bridge health monitoring system,fitting the deflection curve equation of total-bridge based on higher mode of least squares principle is proposed in this paper.This method makes full use of limited measuring point′s information effectively.In this thesis,a continuous rigid-frame bridge is regarded as actual example.The results of total-bridge deflection curve fitting analysis show that this method which fits the deflection curve equation is succinct and the thought is clear.The maximal relative errors of fitting values both are less than 5%.It proves that fitting deflection curve equation of continuous rigid-frame bridge with this method is sufficient accuracy.

关 键 词：连续刚构桥 挠曲线方程 高次最小二乘原理 数值拟合 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]