混凝土简支箱梁徐变效应预测模型修正

摘要

以成渝客运专线大型预应力混凝土简支箱梁徐变效应监测为背景，介绍了简支箱梁徐变效应监测方法及3种现有混凝土构件徐变效应预测模型。通过对比现场实测数据与理论分析结果，分析3种预测模型的优劣以及实用范围，总结理论计算结果与实测结果产生差异的原因，并根据实测数据，运用回归分析方法，对GL2000模型进行修正，得到精度较高，实用范围较广的预测模型。%Based on creep effect monitoring of large prestressed concrete box girder in Chengyu Passen‐ger Dedicated Line ,the box girder creep monitoring method and three predictive models about con‐crete creep effect are described .By comparing the measured data with the theoretical analysis are ana‐lyzed ,the merits and practical range of three prediction models ,summarize the reason of difference between theoretical results with the measured results is summarized ,then according to the measured data ,GL2000 models is corrected with method of regression analysis in order to offer a new predictive model with higher accuracy and wide range .