DEVELOPMENT OF POST-TENSIONED ENERGY DISSIPATING
CONNECTIONS FOR STEEL MOMENT RESISTING FRAMES
Andre Filiatrault, Ph.D., Eng.
Professor of Structural Engineering
University of California, San Diego
This presentation will discuss various aspects of the recent development of post-
tensioned energy dissipating (PTED) connections for steel moment-resisting frames in
active seismic regions. PTED connections incorporate high strength steel post-tensioned
(PT) bars designed to remain elastic during the seismic response, and confined energy-
dissipating (ED) bars designed to yield both in tension and compression. The main
features of PTED connections are their self-centering characteristics and their ability to
transfer bending moments without the need of full penetration welds between the flanges
of the beams and the columns. The presentation will focus on three particular aspects of
the development of PTED connections:
1) The results of dynamic tests conducted on a half-scale steel moment-resisting
frame assembly incorporating two exterior and one interior PTED connections.
2) The development of a numerical model to capture the behavior of the test
assembly and also to predict the general response of steel frames incorporating
3) The results of a parametric numerical study on the seismic response of single-
degree-of-freedom (SDOF) systems incorporating hysteretic structural behavior
with self-centering capability.
André Filiatrault received his Ph.D. in Civil Engineering from the University of British
Columbia in Vancouver, Canada in 1988. After a two-year stay as an Assistant Professor
at the University of British Columbia, he joined the Department of Civil Engineering at
Ecole Polytechnique of the University of Montreal, where he became a Full Professor in
1997. Filiatrault joined the faculty at the University of California in San Diego as a
Professor in 1998. In 1990, he was awarded the Gzowski Medal, by the Canadian Society
for Civil Engineering for his work on the seismic response of wood structures. In 2002,
he was awarded the Moisseiff Award by the American Society of Civil Engineers for his
research work on the seismic modeling and testing of wood structures that included the
first shake table testing of a full-scale wood structure in the United States. Filiatrault is
the author of a textbook (with French and English versions) on Earthquake Engineering.
In 1997, the French version of his textbook received the Roberval Prize (France) for the
top French written book in the category “Graduate Teaching”. Filiatrault is a faculty and
member of the scientific board of the Rose European School for Advanced Studies in
Reduction of Seismic Risk based at the University of Pavia in Italy. He is a registered
professional engineer in the Province of Quebec, Canada.