本文用椭圆抛物面作为混凝土三向应力时的强度破坏面。
An elliptic paraboloid is proposed as the failure surface for concrete under multiaxial Stresses.
结果表明：浸润面为一椭圆抛物面，所得结论与实验结果相符。
The result shows that the infiltrated surface is an elliptic-parabolic one, and the conclusion accords with the results of experiment.
本文根据已论证过的混凝土破坏面，即椭圆抛物面的数学模型，报导出一个用以计算混凝土纯剪强度的简单公式。
A simple formula for calculating pure shear strength of concrete is derived on the basis of the verified mathematical model of concrete failure surface, the elliptic paraboloid.
抛物面一种有与单坐标轴平行的抛物截面和与该轴垂直的椭圆截面的平面。
A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.
抛物面一种有与单坐标轴平行的抛物截面和与该轴垂直的椭圆截面的平面。
A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.
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