Study On Mechanical Behaviors Of Unbonded Prestressed Steel Reinforced Concrete Componets

Unbonded prestressed steel reinforced concrete structure is a new structure style, with unbonded prestressed tendons in steel reinforced concrete structure. This new structure style has the advantages of both the prestressed structure and the steel reinforced concrete structure. But the study and application on unbonded prestressed steel reinforced concrete remain in its infancy, there are many technology difficulties in design theory and actual application. So this paper will study on the mechanical behaviors of unbonded prestressed steel reinforced concrete components.Raising the construction technology of bending, tension and compression unbonded prestressed steel reinforced concrete components. This study will make important influence for the application of unbonded prestressed steel reinforced concrete structure in actual engineering. Through theoretical analysis, this paper made elastic analysis of tension, bending and compression components in impose prestressed stage, construction stage, consume pressure stage, cleavage stage and yield stage.Through the research on unbonded prestressed steel reinforced concrete beam, elastic limit bending resistance load-bearing capacity calculate formulas are established in different destroy patterns, and the plastic limit bending resistance load-bearing capacity calculate formulas are also obtained. Through the research on unbonded prestressed steel reinforced concrete tension and compression components, the corresponding calculate formulas are obtained. These calculate formulas can accomplish the pragmatic design method of unbonded prestressed steel reinforced concrete components.Adopting composed method, this paper established the nonlinear analysis procedure by using FORTRAN language, and analysed the load-deformation relation of unbonded prestressed steel reinforced concrete eccentricity pressure components. The influence of eccentricity distance, concrete grade, steel rate, and prestressed quantity has been discussed.