ABSTRACT
A series of experimental tests were conducted to investigate the behavior of an innovative post-tensioned (PT) top-and-seat-angle wide flange beam-to-column moment connection for steel moment resisting frames subjected to seismic loading conditions. Five full-scale specimens were tested. Each specimen represented an interior connection and consisted of two W36×150 beams attached to a W14×398 column. The parameters investigated in the study included the number of PT strands and the initial post-tensioning force. The results of the test program demonstrate that post-tensioned connections possess exceptional cyclic strength and ductility. The connection can be designed where energy dissipation occurs in the angles while other structural members remain elastic. The initial elastic stiffness is comparable to that of a welded connection, and following severe inelastic cycles of drift the connection has essentially no permanent deformation.
