ANALYTICAL STUDY ON THE EXPANSION INDUCED BY ALKALI SILICA REACTION FOR RC MEMBERS

Abstract

The expansion model of concrete due to Alkali Silica Reaction (ASR) was proposed basing on the damage theory and introduced to the three dimensional finite element method. By comparing with the uni-axial restrained experiments, the expansion strains due to ASR, which depend on the difference of the reinforcement restraint were predicted accurately. The proposed model was applied to the ASR damaged specimens reinforced in multi-axial directions with different reinforcement ratio in order to evaluate the concrete expansion and strain localizations near the bent corner of reinforcement. Then, by comparing with experimental results, it was confirmed that the proposed model was effective in predicting the ASR damages of RC structures.