Unbraced frames with semi-rigid composite connections

Abstract

The semi-rigid composite connection is a connection made from a typical pinned end connection and continuous slab reinforcement across the connection. Tests on the connection with seat angle by the authors have shown this connection type has a high degree of linearity in the service load region and that its ultimate capacity is easy to predict. This paper describes a design procedure for unbraced frames utilizing semi-rigid composite connections. Two design examples, one for a four-story structure and one for a ten-story structure, and comparisons of their behavior with that of rigidly designed frames are included.