Methods for Improving the Seismic Response of Concentrically Braced Steel Frames

by Ibrahim F. Khatib, Univ of California at Berkeley, Berkeley, CA, USA,
Stephen A. Mahin, Univ of California at Berkeley, Berkeley, CA, USA,

Document Type: Proceeding Paper

Part of: Dynamics of Structures


This paper briefly reviews various factors contributing to the poor performance occasionally observed in concentrically braced steel frame structures during recent earthquakes. Several alternative systems for improving this behavior are described for chevron (K) braced frames. The relative effectiveness of these variants is evaluated on the basis of results of analytical simulations. Guidelines for the design of such frames are identified from these studies.

Subject Headings: Steel structures | Steel frames | Dynamic structural analysis | Earthquake resistant structures | Seismic design | Load and resistance factor design | Seismic tests | Structural behavior

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