Analysis Of SFRC Components Concerning Damage

Famous for the outstanding mechanical function, simple construction craft and remarkable economic performance, SFRC is a kind of new building material suffered increasing concern by the engineers. For the merits, the research on the mechanical characteristic, reinforce mechanism and many structural performance of the SFRC has gradually matured but it still has many important problems desiderate to be researched and resolved. The topic of this article is about the damage mechanical performance of SFRC which gained rare attention of the people currently.Firstly, three point bending experiment of the SFRC beam was carried out. As result P-CMOD and P- â–³ curves have been gained in the experiment. Some material parameters were figured out by use of the experiment curves. Summarized the strength mechanism of the steel fibre, a method to turn the P- â–³ curves into stress-strain curves was put forward. Based on the stress-strain curve, a polynomial formed damage evolution formulation gained. It has a simple form and much less parameters, so it easy to be used in real projects.Then, the latter of this article gave a research on the FEM concerning damage effect and have a trying research on the programme. What's more, this article verified the damage evolution formulation by using the programme and the result of the experiment.Finally, Reckon the four points bending laminated beam of SFRC by the programme. The damage model in the programme is the polynomial formed damage evolution formulation and the parameters are from the experiment result of this article. Contrasting the load at the beginning of the crack, the utmost load, the deflection correspond to the beginning of the crack, the deflection correspond to the utmost load, the order and the place of the destroyed elements, this article drew some useful conclusion.