This paper presents an analytical stress-strain model to predict the compressive stress-straincharacteristic of confined lightweight concrete subjected to short-term loading. Lightweight concrete ismade with expanded clay lightweight coarse aggregate. Confinement used is a combination of lateralreinforcement and short steel fibres. In this paper, performance of the model is also examined bycomparing predicted stress-strain profiles of the model with experimental profiles of reinforced columnstested under uniformly distributed axial loading. Favourable agreement between the predicted profilesand measured ones is observed. This agreement not only indicates the accuracy of the prediction, butalso proves the validity of the model. Using the model in analysis of fibre-reinforced lightweight concretemembers, reliable accuracy of the analysis would be ensured, heading towards the most favourablestructural design.
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