2．2．1．1徐变系数（creep coefficient）的定义为，混凝土在f时刻开始加载，到t时刻所发 生的徐变变形与瞬时弹性变形的比值。
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徐变系数的数学模型 Mathematical model for creep coefficient
After loading 180d, creep coefficient of multiple concrete with 60% handstone rate is 0.996, which reduces by 14.7% compare to multiple concrete with 58% handstone rate.
小石率60%的双掺混凝土持荷180d的徐变系数为0.996,较小石率58%的徐变系数相应降低了14.7%。
参考来源 - C60低徐变混凝土性能研究·2,447,543篇论文数据，部分数据来源于NoteExpress
混凝土内部应力测量关键在于应力应变转换，而应力应变转换关键在于徐变系数的识别。
The key to concrete stress measure is the translation from strain to stress. And the transition 's key is the identification of creep factor.
分析了细骨料和粗骨料对高强混凝土徐变性能的影响规律，提出了徐变系数的预测计算公式。
The formula is proposed for predicting the creep-coefficients of high-strength concrete of different aggregates.
为了进一步进行整体结构施工阶段分析，本文继而用组合徐变系数来表达钢管混凝土轴压构件的徐变变形。
For the sake of further analysis on the overall structure in the construction phase, composite creep coefficient is adopted to express the creep behavior of centric loaded CFST members.
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