Strain Energy Release Rate and Yield Strength for Normal and SCC with and without Glass and Steel Fibres

Concrete is versatilely used building material. Its use in economical way is justified. Usually, torsion is predominant in water tank ring beam, canopy beams and cantilever retaining wall. Usually, failure in the structure is acceptable only after proper yielding of the material. According to limit state design philosophy balanced section is preferred. So here an attempt is made to identify yield strength of normal concrete and SCC with and without glass and steel fibres.  Its torsional strain energy release is identified and in which concrete it is low and rate of taking the strength is discussed. Here plain concrete are considered. The performance is measured with respect to energy release and yield strength.