Plastic analysis of castellated beams—I interaction of moment, shear and axial force

Abstract The Stress Resultant and Non-Local Theories of shear and moment interaction at fully plastic sections are critically reviewed and practical lower bound relationships for shear, moment and axial force interaction of plastic, rectangular and T-sections are derived. These relationships are used for developing an incremental digital computer procedure for the analysis of castellated beams in the elastic and plastic ranges.