该文根据自密实混凝土水化曲线形式,采用指数函数体现混凝土老化作用的"固结度",推导了自密实混凝土粘弹性相徐变度积分表达式的闭合形式解;同时根据自密实混凝土结构组成的复合性,提出整体自密实混凝土的基本徐变表达式,在试验基础上验证了计算模型的适用性。
Based on the analysis of the hydration curve of self-compacting concrete (SCC), the closed form solutions for the integral equations about basic creep of viscoelastic parts of SCC are derived by using the exponential formulation to express the "solidification degree" of aging concrete. The theoretical formulas for predicting the basic creep of whole SCC from its composition and the properties of constituents are deduced. The model is calibrated by experimental data from creep and adiabatic temperature rise tests, and the results indicate that the model presented in this study can calculate the basic creep of SCC excellently.