Study on Determination of Control Tension Stress in Prestressed Concrete Hollow Slab

摘要

The numerical method is employed to simulate the whole loading process of bending prestressed concrete hollow slab, keeping the section and loading constant,with the variation of some specified parameters such as span-height ratio, reinforcement ratio, the strength of concrete and strength of steel bar, reasonable value of control tension stress of prestressed concrete slab with mid-strength spiral-rib steel wire is determinated by numerical simulation. The simulation results are compared with the Full scale model test, and the comparison suggests that prestressed concrete slab with mid-strength spiral-rib steel wire can meet the demand of deflection and rupturestrength when it is in service, which ensure the durability of prestressed concrete hollow slab.