The Effect of Connection Flexibility on Steel Members and Frame Stability

by Stanley D. Lindsey, Stanley D. Lindsey & Assoc, Nashville, TN, USA,
Socrates A. Ioannides, Stanley D. Lindsey & Assoc, Nashville, TN, USA,
Arvind V. Goverdhan, Stanley D. Lindsey & Assoc, Nashville, TN, USA,

Document Type: Proceeding Paper

Part of: Connection Flexibility and Steel Frames


With the advent of Load and Resistance Factor Design (LRFD) and the many existing moment-rotation curves for connections, the use of actual connection flexibility in the design process has become a reality. Section A2. 2 of the LRFD Specification addresses directly the use of known connection flexibility for design. This connection flexibility influences the performance of both the steel beams and columns. In addition, it greatly influences frame stability. This paper discusses some of these influences on beams, columns and frame stability. Comparison to performance with Partially Restrained (PR) and Fully Restrained (FR) connections is made with specific examples. General conclusions and recommendations are made to help the design engineer determine when the use of connection flexibility can be beneficial.

Subject Headings: Beam columns | Load and resistance factor design | Steel beams | Steel columns | Steel structures | Structural stability | Frames | Steel frames

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