A comparison of finite element solutions for 2d reinforced concrete structures

The finite element (FE) method enables to account for material and geometrical non-linearities in the simulation of the behaviour of reinforced concrete structures. However, the accuracy of the numerical solution with respect to experimental tests is often questionable in the case of 2D structures. Past round robin exercises and competitions showed significant scatter of the predicted results with respect to the correct ones. Even though validated computer codes can be used to predict the structural response, the uncertainty of the numerical simulation cannot be neglected. As a consequence, the application of finite element models to the assessment of concrete structures requires a proper investigation of the uncertainty related to the results of the simulations. The paper presents a comparison of numerical simulations of several case studies taken from past experimental tests. The aim of the investigation is to show how significant is the difference between the experimental and numerically evaluated failure load.