Abstract
The direct tension test on concrete specimens is analysed using finite elements. The analysis shows that the behaviour after peak load is strongly non-homogeneous and involves asymmetric crack propagation. These observations, which are supported by experimental evidence, have consequences for deriving “stress-strain” relations from direct tension tests, since they demonstrate that the observed softening behaviour is partially a structural effect. Attention is furthermore drawn to the possibility of snap-back behaviour in strain-softening concrete and to consequences thereof for numerical and experimental investigations.
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