Reliability Methods for Steel Members Subjected to Axial Load and Moment

by Richard M. Bennett, Univ of Tennessee, United States,



Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering

Abstract: There has been a significant amount of research performed on determining the reliability of elastic-plastic frames where failure is through the formation of a plastic collapse mechanism. Among the assumptions often made in the analysis is that the axial load does not affect the moment capacity of a member. This is in general not true. For steel members, the capacity is governed by an interaction diagram, for which no closed form solution exists. Four methods for handling the interaction diagram in a reliability analysis are examined. The methods are verified with an examination of an arbitrary cross-section of a member and then applied to a small example frame.

Subject Headings: Axial loads | Steel structures | Moment (mechanics) | Steel frames | Material failures | Structural failures

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