Optimum design of unbraced rigid frames Behavior of braced and unbraced semi-rigid frames The effective length of columns in Unbraced frames Shaking table tests of a two-story unbraced steel frame Practical advanced analysis for unbraced steel frame design Effective Length Factor for Columns in Unbraced Frames Optimum design of unbraced steel frames to LRFD-AISC using particle swarm optimization The design and behavior of beam-columns in unbraced steel frames Flexible Moment Connections for Unbraced Frames Subject to Lateral Forces—A Return to Simplicity Story Stability of Braced, Partially Braced, and Unbraced Frames: Classical Approach