F.E MODELING OF NORMAL AND SELF-CONSOLIDATING RC BEAMS AND EXPERIMENTAL BENDING BEHAVIOR OF SCC BEAMS

Development of a new generation of concrete, self-consolidating concrete, SCC is a very desirable achievement in the RC structures for overcoming problems associated with many problems such as congestions of steal reinforcement. This non-vibrating concrete is not affected by the skill of workers, and shape and amount of reinforcing bar arrangement of a structure. Due to high-fluidity and resisting power of reinforcing of SCC, it can be pumped longer distances. In this research, the finite element, F.E modeling of four normal concrete (vibrating concrete), NC and SCC beams in bending is performed and the results are compared together. For the experimental phase, the results of available tested beams of dimensions 20 cm width, 30 cm height and 300 cm length are used. For modeling longitudinal steel bars and concrete, the 2-node and 8-node 3-D elements, are used respectively. The 8-node element has ability to consider cracking in tension and concrete crushing in compression. The deflection, cracking, yield and ultimate loads, as well as beams ductility are compared numerically and experimentally. The comparison of results obtained by two methods indicates that a satisfactory agreement is achieved.

Keywords:

self-consolidating and normal concrete , bending behavior , finite element modeling