308 / 2019-09-29 21:38:23

Numerical simulation of anti-explosion mesoscopic performance of high performance steel fiber reinforced concrete slab

steel fiber concrete,random delivery, finite element analysis, anti-explosion analysis,different volume admixture

计算力学在工程中的应用 > 复合材料力学

This paper presents a new three-dimensional steel fiber concrete（SFRC） mesoscopic numerical model. Using MATLAB to realize random distribution of different volume fraction of steel fiber in the Concrete, and the geometric model is imported into the finite element software ANSYS/LS-DYNA in uniaxial compressive strength calculation, using JHC (Johnson - Holmquist - Concrete) material model to simulate damage behavior of concrete, the steel fiber adopts the *MAT_PLASTIC_KINEMATIC material keyword, and compared with experimental curve of axial compression to verify the effectiveness of the mesoscopic numerical model, And the steel fiber volume content of 0%, 1.2%, 2.4% and 4.8% respectively, high strength reinforced concrete plate, plate simply supported in a state of different doses were analyzed its dynamic response behavior in its upper part explosion and antiknock ability, comparing with the test result shows that this method is used to establish the fiber and concrete two-phase mesoscopic numerical model can be a good reaction bang super dynamic damage behavior under dynamic loading structure, at the same time, with the increase of steel fiber volume content, plate of antiknock performance enhancements.