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本文利用作者研制的混凝土三轴试验系统,对钢纤维混凝土试件在三向受压、两向受压一向受拉、两向受拉一向受压及三向受拉的应力状态下的强度进行了试验研究.除离散的试件外,可用于统计分析的试件数为184块,应力比22种.根据试验资料,、探讨了中间主应力和纤维体积含量对三向受力状态下钢纤维混凝士强度的影响;阐述了钢纤维混凝土在偏平面上破坏面的特性;给出了钢纤维混凝土三向应力状态下空间破坏准则的数学表达式.该表达式包含了三向受拉及两向受拉一向受压应力状态的影响.
In this paper, using the concrete triaxial test system developed by the author, the strength of the steel fiber reinforced concrete specimen under three-phase compression, two-way compression, one-way tension, two-way tension and three-way tension In addition to discrete specimens, the number of specimens that can be used for statistical analysis is 184, and the stress ratio is 22. According to the experimental data, the intermediate principal stress and the volumetric content of the fibers are investigated. The influence of the strength of the mandolin; the characteristics of the failure surface of the steel fiber reinforced concrete in the plane of deflection are described; the mathematical expression of the spatial failure criterion of the steel fiber reinforced concrete in the triaxial stress state is given. The expression includes the three-direction tension and The influence of the compressive stress on the biaxial tension has always been affected.