Elastoplastic Modelling of an In Situ Concrete Spalling Experiment Using the Ottosen Failure Criterion

Figure 17

Predicted development of fracture initiation and propagation during nine weeks of heating for EDZ and VT1 stress interpretation (a) without concrete support (upper row) and (b) with concrete support (lower down). The temperature distribution is shown in top right figure and the displacement distribution and displacement vectors after nine weeks are shown on the bottom right. The temperatures and displacements are similar for both stress interpretations. The fractures are color-coded red green for tension (mode I), red for shear (mode II), and blue for boundary fractures.

(a) Without concrete support

(b) With concrete support