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Seismic design methodology for friction damped braced frames
Author(s) -
Levy Robert,
Marianchik Eduard,
Rutenberg Avigdor,
Segal Fred
Publication year - 2000
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/1096-9845(200011)29:11<1569::aid-eqe960>3.0.co;2-4
Subject(s) - diagonal , structural engineering , damper , bilinear interpolation , stiffness , engineering , displacement (psychology) , braced frame , frame (networking) , steel frame , earthquake engineering , slip (aerodynamics) , computer science , mathematics , mechanical engineering , geometry , psychology , computer vision , aerospace engineering , psychotherapist
This paper is concerned with the design of steel frames using friction damped slotted bolted connections (SBCs) in the diagonal braces. A dynamic model is developed to describe the behaviour of a single‐degree‐of‐freedom (SDOF) steel frame that uses bilinear hysteretic behaviour for the damper. This model is generalized to MDOF systems. A novel algorithm for displacement reversal in the transition from slip to stick is presented. It uses numerical noise for its success. A design procedure that attains the stiffness of the individual braces and their elongation at the threshold of activation is then applied to a 10‐storey steel frame. This design process is a two‐phase iterative procedure that converges quite fast. Copyright © 2000 John Wiley & Sons, Ltd.