Abstract
In this study, based on the concrete damaged plasticity (CDP) model in the ABAQUS software, various plastic damage factor calculation methods were introduced to obtain CDP parameters suitable for reactive powder concrete (RPC) materials. Combined with the existing tests for the bending performance of steel-reinforced RPC beams, the CDP parameters of the RPC material were input into ABAQUS to establish a finite element model considering the bond and slip between the steel and RPC for numerical simulation. The load-deflection curve obtained by the simulation was compared with the measured curve in the experiment. The results indicated that on the basis of the experimentally measured RPC material eigenvalue parameters, combined with the appropriate RPC constitutive relationship and the calculation method of the plastic damage factor, the numerical simulation results considering the bond-slip were in good agreement with the experimental results with a deviation of less than 10%. Thus, it is recommended to select a gentle compressive stress-strain curve in the descending section, an approximate strengthening model of the tensile stress-strain curve, and to use the energy loss method and Sidoroff’s energy equivalence principle to calculate the RPC plastic damage parameters.
Highlights
The concrete damaged plasticity (CDP) model in the ABAQUS finite element software is widely used for the simulation analysis of the mechanical properties of ordinary concrete structural members
It can bethe observed from the results of the tensile constitutive model in [14,20] considering the bond-slip between the steel and reactive powder concrete (RPC) were in good agreement with the experimental results
There was an error between the results with or without the bond-slip and the experimental values due to the difference between the RPC constitutive relationship curve and the actual value
Summary
The concrete damaged plasticity (CDP) model in the ABAQUS finite element software is widely used for the simulation analysis of the mechanical properties of ordinary concrete structural members. Several calculation methods for CDP model parameters of concrete have been proposed [1,2,3,4,5], including the calculation of concrete damage based on energy loss, specific strain method or graphic method, and a combination of elastic modulus damage and energy equivalence principle of Sidoroff. These methods utilize the CDP model parameters of normal strength concrete in ABAQUS. A national standard for the RPC tension compression constitutive equation in China is lacking, which is an important factor for the calculation of CDP model parameters for RPC
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