Abstract
In order to improve the safety of building structure, the discrete element method is introduced to test the stability of building concrete structure. Taking reinforced concrete as the research object and using Mohr-Coulomb criterion as the concrete failure criterion, determine the stiffness coefficient, damping coefficient and time step of reinforced concrete. Simulation of failure modes of reinforced concrete beams under different shear-span ratios. Determining the collapse process of reinforced concrete structure under the action of strong earthquake El-Centro north-south wave, and testing the stability of reinforced concrete structure. The results show that at the moment of 3.25 s, the bottom spring of the bottom column of the frame structure is damaged, and the upper end of the right column of the middle two layers is deformed and damaged. At this moment, the frame structure collapses. As the shear-span ratio increases, the failure mode of reinforced concrete beams evolves in the order of diagonal pressure, shear pressure and cable tension. Its shear strength is gradually weakened, and the proposed method can effectively simulate the stability of concrete structures under the action of earthquakes and collapse.
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