ABSTRACT
The models of ductile structures appropriate for graphic-analytical analysis enable us to obtain only a qualitative picture of a structure’s operation under loading. While the analysis methods developed for elastic statically indeterminate structures enable us to obtain exact solutions of applied problems by graphic-analytical means, the exact methods of analysis of statically indeterminate ductile bar structures are exercised on computers only. In calculation of a bending moment at the cross-section with a plastic hinge, the short portion of the member containing the section is considered to be the totality of longitudinal fibers, each of which is deformed according to idealized diagrams with reloading. Sometimes, in cases when the time sequence of load application is important, the principles of analysis developed for the one-step loading process are employed for the multistep process of loading. The static principle of analysis supplements the described method of sequential identification of connections.
