ABSTRACT
Steel structures for multistoried buildings can be classified according to the three well-known main classical categories, that is, moment-resisting frames (MRFs), concentric-braced frames (CBFs), and eccentric-braced frames (EBFs). In the last few decades, theory and practice have been devoted to improving the behavior of classical systems by means of more sophisticated details (Section 4.2) as well as to proposing more advanced systems for seismic-resistant schemes (Section 4.3) and beam-to-column connections (Section 4.4), for improving structural effectiveness and energy absorption capacity.
