ABSTRACT
A post-tensioned connection for earthquake resistant steel moment resisting frames (MRFs) is introduced. The connection has excellent ductility, limits inelastic deformations to the easily replaceable components of the connection, requires no field welding, and returns the structure to its pre-earthquake position. The connection includes bolted top and seat angles with post-tensioned high strength strands running parallel to the beam. Analyses were performed on a 6-story, 6-bay post-tensioned steel MRF to study its response to strong ground motions. Results show good energy dissipation, strength, and ductility in the post-tensioned system. The analyses indicate that the seismic performance of a post-tensioned steel frame can exceed that of a frame with conventional moment resisting connections.
