At present, there are many creep prediction models. It is one of the most uncertain characteristics of concrete. The shrinkage and creep of concrete has time-varying characteristics. It will lead to the bridge alignment cannot reach the expected design alignment. However, the inherent performance of concrete as shrinkage and creep has obvious impact on bridge deflection. Prestressed concrete box girder has been widely used in bridges for its advantages of large structural stiffness, small deformation and beautiful shape. Finally, the finite element model of solid elements considering the effect of prestress relaxation with the GL2000 creep prediction model is used to analyze the shrinkage and creep effect of a prestressed concrete continuous rigid frame bridge. The comparison results show that the calculated value of the refined finite element model with reasonable prediction models and considering the effect of prestress relaxation is closer to the measured value. Considering the influence of prestressed tendon relaxation on the shrinkage and creep of concrete, a refined finite element model is established for numerical analysis and compared with the experimental data. For a 60 m prestressed concrete box girder bridge using structural analysis software as ANSYS and MIDAS/civil, combined with several creep prediction models, a reasonable creep prediction model has been obtained.
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