The Inner Forces Redistribution of Continuous Beams

Abstract

The technical plastic theory is applied for steel structures design in actual standards. This theory and standard calculate procedures assumed the plastic redistribution of internal forces by arising and development of plastic hinges and plastic mechanism failure of the structure. The plastic redistribution of internal forces enables the loading of structure to increase. The plastic redistribution and increasing of the loading cause also changes in the support reactions that are generally needed to consider as the actions on the structural supports. The redistribution of internal forces and the changes of support reactions depend on the elastic-plastic properties of constructive steels that are variable. Therefore, plastic redistribution of internal forces may not be absolute, or may not arise at all. In the paper, the effect of elastic-plastic redistribution of internal forces on the load-carrying capacity and the changes of support reactions for selected continuous beams are analyzed.