NEHRP Clearinghouse

Title
Seismic Behavior of Active Beam Links in Eccentrically Braced Frames.
File
PB84119676.pdf
Author(s)
Hjelmstad, K. D.; Popov, E. P.
Source
National Science Foundation, Washington, DC., July 1983, 178 p.
Identifying Number(s)
UCB/EERC-83/15
Abstract
An eccentrically brace frame is a structural framing system in which the axial forces in the braving members are transferred either to other braces or to columns through shear and bending in short beam segments called active links. The active link acts as a fuse, dissipating large amounts of input energy upon lateral overloading of the structure and its behavior dominates the behavior of the structure. While experiments have demonstrated the good global behavior of the framing system, the inelastic behavior of the active links has not been adequately evaluated, especially as regards the web buckling phenomenon. Furthermore, rigorous analytical tools for the inelastic analysis of the active link elements, and therefore eccentrically braced frames, appear to be lacking. These two important topics are treated in this report.
Keywords
Dynamic response; Braces; Earthquake engineering; Earthquake resistant structures; Mechanical hysteresis; Earthquakes; Lateral pressure; Framed structures; Buckling; Dynamic structural analysis