混凝土三维等效单轴应变本构模型的研究

Study on 3 D Equivalent Uniaxial Strain Stress Relation of Concrete

以应力 应变曲线的实验值与计算值的误差达到最小为目标，反演出相应于最大应力的等效单轴应变值εｉｃ ，并回归得到三轴受压时εｉｃ 的计算公式；对二轴受压一轴受拉、一轴受压二轴受拉及三轴受拉等受力状态提出了εｉｃ 的计算方法．算例表明本文的方法是合理的．

The values of ε ic ,by which the mean error between calculated and experimental values is minimized,are obtained from trail calculation of available experimental values,and regression equations for calculating ε ic under triaxial compression are given.The method for calculation of ε ic under triaxial compression tension and triaxial tension is also presented.Examples show the present method is reasonable.