ABSTRACT
Steel is common construction material for the land-based and offshore structure. From the stress–strain curve of steel, it is evident that the material has got very good capacity beyond the first yield, which is not used in the elastic design of structures. This material strength beyond yield value, which is not utilized in the elastic design principle, is effectively utilized in the plastic design of structures. However, this also promotes large permanent plastic deformation in the structure under excessive loading. Hence, it is mandatory to check the structure for both loads carrying capacity and ductility. This chapter deals with the plastic analysis and design of structures. Example problems are solved using both the upper-bound and lower-bound theorems. Computer code used for estimating the capacity of plastic sections is presented.
