The Numerical Simulation Of Mesoscopic Mechanical Properties Of Imitation Steel Fiber Lightweight Aggregate Concrete

Organic imitation steel fiber has excellent performance in improving the compressive strength,toughness and heavy self weight of concrete,and is very optimistic in the prospect of replacing steel fiber.But at the present stage,most of the train of thought for the study of imitation steel fiber lightweight aggregate concrete is to change the related factors through testing the concrete of certain groups and change the related factors.After a certain period of maintenance,the test results are compared with the control group to analyze the size of the influence of a certain variable,so as to determine the optimal dosage.Such a test process is not only long and costly,but also brings serious waste and pollution of building materials.At the same time,it is difficult for macroscopic experiments to analyze the meso mechanical mechanism of concrete.On the other hand,the factors affecting the performance of concrete are many and complex,and sometimes there is a coupling between the various factors.It is clear that the main factors and the optimal amount of admixture are not in keeping with the development of the times.With the development of computer science and finite element theory,we need to use these two powerful tools to help us improve our research ability and efficiency with the development of computer science and finite element theory.Based on the lightweight aggregate concrete with strength of C30,this paper mixed natural pumice and imitation steel fiber into imitation steel fiber reinforced concrete with light aggregate.After maintaining a certain age,the compressive strength of the concrete was tested.Through the analysis of experimental data and macroscopic phenomena,the overall performance of the concrete was discussed and summarized as a whole.Compressive strength,stiffness,crack initiation and deformation.Secondly,on this basis,the circular and polygonal random aggregate fiber concrete model is established by MATLAB software programming,and a good human-computer interaction interface is made,and the amount of different imitation steel fibers is input through the interface to get different models.Then these models are introduced into the ABAQUS finite element software through the AutoCAD software.It is analyzed separately.The conclusions of the study show that:1.The compressive strength and resistance to deformation of lightweight aggregate steel fiber reinforced concrete are improved to some extent by blending imitation steel fiber.2.With the help of MATLAB,the random fiber aggregate model can be established,which can be used to realize the change of fiber content or aggregate content,and can be extended to multifactor analysis as a useful supplement for the experiment.3.Using ABAQUS to analyze the concrete model,the results are in good agreement with the test results,and can meet the expectations.