Behavior Analysis Of Prestressed Hollow Plate With Nobonded Tenons On Normal Use Stage

In this paPer, the prestress increment of the unbonded reinforcement iscalculated by the fOrce method of structural mechanics according to the sectionbend characteristic of unbonded prestressed concrete simple suPported beam at thenormal use stage. The structural nonlinear and the prestress incremellt ofunbonded tendons and the loss of unbonded prestress calculated. The stress ofsection is gained by the fOrmula of material mechanics and the anchor end'seccentricity is taken as the structural eccentricity according to the structural trait ofunbonded structure, and some useful conclusions are educed by the comparisonwith the result of the static test of unbonded prestressed hollow plate. The layeredcombined finite element model is taken in the finite analysis of concrete andbonding bar. In the nonlinear analysis ofunbonded prestressed concrete, the effectthat unbonded tendons acts on concrete is replaced by equivalent force in themethod of equivalent prestress. The structure is analyzed by the finite elementprogram (SAP) and the feasibility of theory analysis is validated by thecomParison with the test.