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采用电液伺服阀控制的刚性试验机对不同钢纤维含量,不同养护条件下的活性粉末混凝土(Reactive Powder Concrete,简称RPC)进行了立方体抗压试验与轴心抗压试验。通过对试件立方体抗压强度的测定,确定了RPC的强度等级。通过对试件轴心受压应力-应变曲线的测试,得到了RPC轴心抗压强度,掌握了轴心受压过程中RPC应力-应变变化规律。同时对不同应力-应变曲线比较,分析了RPC的弹性模量、峰值应变、受压韧性指数等受压力学特性及材料本构关系,并针对结构的正截面承载力计算分析,提出了相应的计算本构模型。对于RPC力学性能的研究可以为实际工程结构的设计提供理论支持。
A rigid test machine controlled by electro-hydraulic servo valve was used to conduct cubic compression test and axial compression test on Reactive Powder Concrete (RPC) with different steel fiber content and curing conditions. The compressive strength of cubes was tested to determine the strength level of RPC. By compressing the stress-strain curve of the test specimen, the compression strength of the RPC was obtained and the stress-strain curve of the RPC was grasped. At the same time, compared with different stress-strain curves, the RPC mechanical properties such as elastic modulus, peak strain, compressive toughness index and constitutive relations of materials were analyzed. According to the calculation and analysis of the bearing capacity of the normal section, the corresponding Calculate the constitutive model. The study of mechanical properties of RPC can provide theoretical support for the design of the actual engineering structure.