Relationship between deflection and crack mouth opening displacement of self-compacting concrete beams with and without fibers

Copyright © Taylor & Francis Group, LLC. There are only a few research results for predicting the relationship between deflection and the crack mouth opening displacement (CMOD) of self-compacting concrete (SCC) beams with and without fibers. A series of bending beam tests on SCC, with different fiber types have been carried out. For this purpose, four SCC mixes - plain SCC, steel, polypropylene, and hybrid fiber reinforced SCC - are considered in the test program. Based on the experimental results, a model for predicting the relation between the deflection and CMOD of SCC has been established per each mix. These models rely on the load-deflection relation and the load-CMOD relation of bending beam. A well agreement has been found between the suggested model and the test results. The results of this study indicate that the load-deflection diagram is very similar to that of the load-CMOD diagram, and there is a linear relation between the mid-span deflection and CMOD of SCC.