Polypropylene fibrous concrete have a lot of advantages compared with ordinary concrete as a new kind of construction material. At present, by the look of fibrous concrete application practice in the project of polypropylene, polypropylene fiber as resist, split means can popularize , apply industry and construction work to by a large scale mainly. To make polypropylene fiber get extensive application, we should research polypropylene fiber to concrete toughness, durability, resist every mechanics influence of performance of striking etc...In the ditch, the fracture problem of the concrete has been a problem difficult to solve all the time. So, it is necessary to enter the new materials and analyze, then have structural design directed against it.This text based on the ordinary concrete, has studied with mixing and adding the fibrous impact on the elastic ratio of the concrete and tensile strength of polypropylene of quantity, and then apply it to hydraulic works, at the same time, in the course of analyzing the strength of receiving of the ditch, introduced to the boundary layer and the concept of resistance moves round to flow, change the dynamic question into the static question. In carry on finite element analysis, emphatically analyze part tensile region nodal with ANSYS, summarize finally. The concrete content is as follows:(1) Research results in forefathers carry on survey, recommend polypropylene fibrous material make up and performance;strengthen mechanism and technological analysis of intensity of concrete;(2) Introduced to the boundary layer and the concept of resistance moves round to flow while analyzing the function result of the flowing water, consider , perpendicular to velocity of flow rivers of direction to base plate and slope function result of board;(3) Use the software ANSYS to sets up two-dimensional finite element model, simulate stress-strain curve under hydrostatic pressure and flowing pressure, and compare the result ,obtain the performance advantage of the fibrous concrete ofpolypropylene;(4) Through changing mixing capacity of fiber, analyze the stress change of ditch part tensile nodal, and analyze the result who add resist , split influence of performance to concrete fibrous, achieve the goal of defending splitting, establish the theoretical foundation for the actual project. |