基于混凝土无应力计测值统计模型反演热膨胀系数  

Thermal Expansion Coefficient Inversion Based on Concrete No-stress Measuring Value Statistical Model

作　　者：唐腾飞[1] 黄耀英[1] 周宜红[1] 周绍武[2] 李金河[2] 景继 程中凯[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]中国长江三峡集团公司,湖北宜昌443002

出　　处：《水力发电》2012年第10期33-35,共3页Water Power

基　　金：国家自然科学基金(51079079);国家自然科学青年基金(51209124);湖北省教育厅科学技术项目(D20101207)

摘　　要：针对不同降温时段的无应力计测值反演的热膨胀系数具有随机性这一问题,采用无应力计的温度作为温度变形因子,3个指数函数进行组合作为自生体积变形因子,建立了无应力计测值的统计模型,提出了基于无应力计测值统计模型反演混凝土热膨胀系数以及分离自生体积变形分量。实践表明,基于无应力计测值统计模型反演的混凝土热膨胀系数稳定性较好。To solve the problem of the random of thermal expansion coefficient inversion of no-stress measuring value during different cooling periods, the no-stress measuring value statistical model has been set up, in which, the no-stress temperature is taken as temperature deformation factor and the combination of three index functions is taken as self-grown volume deformation factor. The concrete thermal expansion coefficient inversion and the separation of coefficient self-grown volume deformation can be put forward based on the statistical model. The practice shows that the concrete thermal expansion coefficient based on the statistical model is stable.

关 键 词：热膨胀系数 无应力计 自生体积变形 统计模型 

分 类 号：TV331[水利工程—水工结构工程]