Experiment And Theory Study On Flexural Capacity Of Reinforced Reactive Powered Concrete Beam

Reactive Powder Concrete is a new building materials with high strength 、high toughness、high durability and good compactness. Researchers at home and abroad have done a lot of studies for its application in the field of civil engineering since 1990 s, and most of them are concentrated on the static performance. However, there has been no unified standard and criterion for the RPC component in engineering application and design calculation. In order to promote the RPC application in practical engineering and provide a basis for the design of the RPC component, it is necessary to study the mechanical properties of RPC component.Through the normal section of third-point flexure tests loading test by two same reinforcement ratio RPC beam, This article study the carrying capacity of reinforced RPC beam under concentrated load, detail the condition of deflection change、 crack production and development as well as the ultimate bearing capacity between the experiment process.According to the experimental results and theoretical analysis, by drawing lessons from the simplified principle in calculating bearing capacity of ordinary concrete, and using flat section assumption and the equivalent principle, etc., This article puts forward the calculation method of cracking moment, ultimate bearing capacity and boundary reinforcement ratio of reinforced RPC beam and so on. Besides. This article has compared bearing capacity calculation formula of the related specification at home and abroad for further analysis. According to the specification, This article has checked the stiffness, deflection and fissure, showing that standard formula has certain applicability in RPC component design calculationBased on test results and theoretical analysis, this article verified the theoretical derivation formula by establishing the Midas finite element model. the calculation results are in good agreement with the Midas finite element model. Indicated this advised formula can be used for the design of the reinforced RPC beam and provide a reference for engineering applications.