摘要
本文结合某长江特大桥挠度监测实例,介绍逐步回归分析预测模型的建立,着重探讨挠度变形的主要影响因素,借助MATLAB软件从非桥梁结构的角度预测该桥不同时期的挠度变形值,并与基于灰色关联分析的线性回归预测结果进行对比分析。结果表明,逐步回归分析预测模型具有较高的精度,有较高的可靠性,为桥梁的运行管理提供科学依据。
In this paper, based on the deflection monitoring project in Yangtze bridge, the forecasting modeling for stepwise regression analysis is introduced; the main influence factors of deflection deformation is studied; a MATLAB software is use to forecast the deformation values of a bridge deflection at different time under the perspective of non-bridge structure, and compared to the predictions of gray relational analysis based on linear regression. The results show that the accuracy and reliability of stepwise regression analysis is higher, which provides the scientific basis for the bridge operation management.
出处
《工程勘察》
CSCD
2012年第7期79-83,共5页
Geotechnical Investigation & Surveying
关键词
逐步回归分析
挠度预测
对比分析
影响因素
stepwise regression analysis
deflection prediction
comparative analysis
factors
