Study on Unified Constitutive Relation of Reinforced Concrete Based on Section Reinforcement Ratio
In order to avoid directly dealing with the complex relationship between steel bar and concrete in numerical analysis,a unified theoretical formula for axial compression of reinforced concrete members was derived,and axial com-pression tests of steel-concrete prisms with different reinforcement ratios and different concrete strength grades were car-ried out.Based on the load displacement data measured by the test,combined with the linear regression and fitting func-tion of Matlab curve fitting tool,a unified constitutive relationship based on the section reinforcement ratio was estab-lished,which could describe the mechanical properties of reinforced concrete materials.Through the numerical analysis of the test beam,the results show that the stress-strain characteristics of the numerical model based on the unified constitu-tive relationship has better tally with test result,which proved the feasibility and applicability of the model in the practical application of reinforced concrete.
reinforced concretereinforcement ratiostrength gradeunified constitutive relationshipnumerical model
NETL
NSTL
万方数据
维普
