Research Spotlight: The Effects of Accurate Boundary Condition Modeling on Column Stability

SSRC 2017 Annual Stability Conference

Session S7: Stability of Columns
Thursday, March 23, 2017
1:15 p.m.

The Effects of Accurate Boundary Condition Modeling on Column Stability

Idealization of real-world boundary conditions as either “free,” “pinned,” or “fixed” is common in engineering practice. This research explores the effect of modeling more realistic, in-situ support conditions on column stability. Abaqus is used to assess the moment-rotation capacity of a suite of connections representing commonly encountered boundary conditions. Parameters such as variable axial loads, contact or bearing within the connection, and component yielding are incorporated into the FEA model. The results of the FEA are then used in OpenSees to predict column capacity through a large-displacement, inelastic analysis.

Cliff D. Bishop and Patxi Uriz, Exponent Inc., Menlo Park, CA