Deformation Property Of Steel Fiber Self-stressing Concrete And Finite Element Analysis Of Composite Penstock

Steel Lined Reinforced Concrete Penstock (SLRCP) is important new hydropower station structure, and it is widely used for its specific advantages. However, some defects are discovered along with the extensive application of SLRCP. Since the design principle of SLRCP is allowing the crack of concrete to make full use of strength of steel. So, the crack control is focused, steel fiber reinforced concrete and steel fiber self-stress reinforced concrete are two kinds of high performance concrete , they are applied as the concrete of SLRCP to get a better ability to control crack.However studies on the long-term property of steel fiber self-stress reinforced concrete are very few at present, but it is very important for SLRCP. So the long-term property of steel fiber self-stressing concrete is studied in this paper. The considered factors include steel fiber content, the grades of self-stress, reinforcement ratio etc. Results indicated that no large shrinkage occur during five years. That means this material has a good long-term stability. At the end the formula of expansion and shrinkage deformation are presented.the design principle of SLSFSRCP(Steel lined steel fiber self-stress reinforced concrete penstock) is avoiding crack during functioning of penstock ,so the crack load is an important design parameter .An ANSYS-based FEA (finite element analysis) model to calculate the crack loads applying on SLSFSRCP is raised. This model can calculate the crack loads and steel stress of SLSFSRCP. The calculated results coincide well with the mode) experiment, which assure the exaction of FEA model.