双轴拉压应力下混凝土的强度和应力应变全曲线的试验研究

Experimental Investigation for the Complete Stress-Strain Curves and Strength of Concrete Under Biaxial Stresses of Compression and Tension

应用自制的真三轴拉压刚性试验机，结合高拱坝水工混凝土的受力特点，采用立方体试件进行双轴拉压受力试验。根据试验结果，分析了试件的破坏形态、应力应变全曲线和拉压强度，并给出相应的全曲线方程和强度计算公式。

Using the true triaxial compression-tension stiff mechine, self-designed by the au- thor, the biaxial compression and tension of cube concrete specimen with the properties of force-bearing of hydraulic structural concrete of high arch dam has been experimentally stu- died. According to the experiment, failure form, complete tress-strain curves and strength of concrete specimen under biaxial compression and tension are analysed. The corresponding theoretical formulae for calculation are also proposed.