Numerical simulation of full scale load tests on 50-year-old PC bridge deck beams under different loading and damage conditions

Computational methods and modeling criteria for life-cycle design, assessment, and maintenance of aging structural systems require robust parameter calibration and model validation based on data from existing structures and experimental tests. This paper deals with computational modeling and experimental validation of nonlinear finite element analysis of reinforced concrete (RC) and prestressed concrete (PC) structures. Structural modeling is developed with RC/PC beam finite elements and bi-dimensional finite elements for plane-stress analysis, based on the Modified Compression Field Theory. The proposed approach is applied to numerical simulation of full-scale load tests on 50-year-old PC bridge deck beams under different loading and damage conditions. The models are informed by the results of laboratory tests on material mechanical properties and residual prestressing levels. The comparison of numerical and experimental results of the load tests allows to validate the nonlinear analysis methods and structural modeling strategies and complement ongoing research aimed at corroborating and verifying the accuracy of degradation models for RC/PC structures under corrosion.