Analysis Of Steel Reinforced Concrete Mechanical Behavior In Finite Element Method

The paper summarized systematically steel reinforced concrete application and test and finite element method's simulating study at present in our country and overseas. In finite element method, Steel adopt three broken-line's model, concrete adopt the damage plasticity model .adopting separating model and smear-crack model established finite element model.Details are listed below:1.The representative experiment (Kupfer, concrete biaxial material experiment) is selected for verification of the concrete damage plasticity model. Results have shown that the model is appropriate. Which prove the damage plasticity model can stimulate correctly concrete's mechanical performance.2.Under the condition of axial compression, analyzing the effect of main parameters to steel reinforced concrete's stable capacity and failure mechanism are studied. The parameters taken in account are concrete compression strength, steel ratio, steel strength. In addition, it also analyzing the mechanical performance of SRC pillar with the steel ratio increase.3.At the same steel ratio condition, the author studies the comparison of three categories' capacity and extension, and the influenced to SRC pillar mechanical performance with the ratio of I-beam steel flange breadth and plate girder web's height, square steel tube's size, circle steel tube's diameter.4.The author analyze eccentricity's influence to the three SRC pillar mechanical performance under the eccentric load .5.The author analyze axial load ratio influence to the three SRC pillar mechanical performance under the compression- bending. Also, analysis of the mechanism that ductility reduces and structure becomes brittle with increasing axial load ratio is performed.6.The author makes a comprehensive comparison to the three SRC pillar's mechanical performance superiority on the basis of the above analysis.