About the author  ⁄ Charles W. Roeder, Ph.D., P.E.

Dr. Charles Roeder is a Professor of Civil and Environmental Engineering at the University of Washington. He is actively involved in research and committee work related to the seismic design of steel structures, bridge bearings, and fatigue of steel bridges. Dr. Roeder may be reached via email at croeder@u.washington.edu.

Concentrically braced frames (CBFs) resist large lateral forces due to wind and earthquake loading, and their ductility is largely derived from tension yielding and compressive buckling of the braces. Since 1990, AISC has focused on improving seismic resistance of CBFs by introducing detailing requirements for the connection, geometric limits of the brace, and capacity-design-type strength requirements for the gusset plate and the framing members.

Read More →
STRUCTURE magazine