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Behavior of mass concrete under biaxial compression-tension and triaxial compression-compression-tension

机译：大体积混凝土在双轴压缩-拉伸和三轴压缩-压缩-拉伸下的行为

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摘要

To meet the requirement of nonlinear analysis and design for mass concrete structures, the mechanical characteristics of mass concrete specimens 25 × 25 × 40 cm with three-graded aggregate 5-80 mm under biaxial compression-tension and triaxial compression-compression-tension was studied experimentally with the multiaxial concrete apparatus. In comparison with the corresponding wet-screened concrete specimens 15 × 15 × 30 cm with two-graded aggregate 5-40 mm, it was found that the wet-screened effect and size effect under complex stress states were obvious, as under uniaxial stress state. By regression of the tests results, respective failure criteria for mass concrete in principal stress space and octahedronal stress space were proposed.
机译：为满足大体积混凝土结构非线性分析和设计的要求，研究了三级骨料5〜80 mm，双轴压缩-拉伸和三轴压缩-压缩-拉伸的25×25×40 cm大体积混凝土试件的力学性能。用多轴混凝土设备进行实验。与相应的湿筛混凝土试样15×15×30 cm的5-40 mm二级骨料相比，发现在单应力状态下，复合应力状态下的湿筛效果和尺寸效应明显。 。通过对试验结果的回归，提出了大体积混凝土在主应力空间和八面体应力空间的破坏准则。

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