Plastic Damage Analysis Of RPC Under Uni-axial Compression And Bi-axial Compression Stress States

Reactive Powder Concrete (RPC) is a new cement-based material with super high strength, ductility and durability. Plastic damage analysis of RPC with different steel fiber volume fractions under uni-axial and bi-axial compression stress states is completed in the general finite element software ABAQUS using Lubliner continuum damage model. Analytical results are compared with experimental data. The main contents and results are summarized as follows:1. Several plastic damage models for concrete are compared, and advantages and disadvantages of them are analyzed. These models cannot describe the real failure mechanisms of concrete under complex stress states to date.2. Lubliner plastic damage model for concrete is studied systemly and comprehensively. Ever did not consider that the stiffness degradation and the consideration stiffness degradation two aspects, carries on the theory explanation to the concretes damage process.3. Studies the ABAQUS plain concrete plasticity damage computation parameter, has established the RPC material in ABAQUS software plastic damage computation parameter4. Damage process of RPC under uni-axial compression and bi-axial compression stress states is analyzed using Lubliner plastic damage model in ABAQUS. Steel fiber volume ratios of RPC are 15% and 20% respectively. Bi-axial compressive stress ratios of 1:0.3 and 1:1 are considered. The analytical results obtained are compared with the experimental results. It is concluded that Lubliner plastic model is very suitable for the damage analysis of RPC with steel fibers under uni-axial compression and low bi-axial compression stress states, but not suitable that under very high bi-axial comprssion pressures.