Quantification of the resistance modeling uncertainty of 19 alternative 2D nonlinear finite element approaches benchmarked against 101 experiments on reinforced concrete beams

Abstract

Nineteen 2D nonlinear finite element analysis (NLFEA) solution strategies were benchmarked against a wide variety of 101 experiments on reinforced concrete beams failing in bending, flexural shear, or shear compression. The relatively high number of solution strategies was motivated by the conviction that choices for the constitutive models, the finite element kinematics and equilibrium settings will interact, and must therefore be tested in conjunction. Modeling uncertainty distribution parameters are presented for the 19 solution strategies, using all beams, and using beams with and without stirrups separately. The resulting statistics are discussed against the correctness of the simulated failure modes and failure loads, revealing that rotating crack models perform well for the relatively ductile failures in beams with stirrups, while fixed crack models perform better for the more brittle failures in beams without stirrups. The tailored solution strategies that predict failure modes correctly, imply a log‐normal distribution of the modeling uncertainty with relatively low coefficients of variation. The outlook is that these estimates of the statistical properties of the modeling uncertainties could serve as a basis within safety formats.

Numerical investigation into the effects of corrosion on the shear performance of pretensioned bridge girders with cast-in-place slabs

“…Due to availabilty in Diana, the concrete in the NIB girder and RC slab was modelled using the compression and tension softening curves given in MC2010 [15] and a rotating crack model. The selection of a rotating crack model is supported by a recent comparative study [51]. The models for creep and shrinkage were also chosen from MC2010 [15].…”

Numerical Analysis of Prestressed Concrete Bridge Girders Failing in Shear

“…Furthermore, because a large post-yielding ductility was observed in the experiments, the rotating crack model is preferred over the fixed crack model, because the fixed crack model resists the rotation of the shear crack, leading to premature failure and underprediction of the capacity (de Putter et al 2022). A von Mises plasticity model with isotropic hardening is used for both mild and prestressing steel.…”