一般大气环境下混凝土强度经时变化模型

长期暴露试验和经年建筑物实测是研究混凝土强度经时变化规律的二个主要途径。本文在总结国内外暴露试验和实测结果的基础上，分析了一般大气环境下混凝土强度的经时变化规律，利用统计回归方法提出了混凝土强度平均值和标准差的经时变化数学模型，为进一步研究服役结构抗力变化规律奠定了基础。

MODELS OF CONCRETE STRENGTH CHANGING WITH TIME IN GENERAL AIR ENVIRONMET

Long-time expend test and measurement on many years used buildings are two main ways to research the law of conerete strength chaning with time. Based on analysing and summing up the pervious demestic and overseas methods, the law of concrete strength changing with time in general air environment is analyzed. By use of statistical regession analysis, the mathematic models of mean-values and standard errors of concrete strength are established herein. So a foundation is provided to further research the resistance changing law on service structure.