Load Path Dependence of Structural Systems

by Tsau Yueh Wang, Johns Hopkins Univ, United States,
Ross B. Corotis, Johns Hopkins Univ, United States,
Bruce R. Ellingwood, Johns Hopkins Univ, United States,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


This paper presents the results of an investigation into the sensitivity of the behavior of framed structures to load path. Simple but realistic structural steel frames have been designed in accordance with the provisions of the American Institute of Steel Construction. Load space formulations of elastic, shakedown, and failure limit states have been constructed using a structural analysis program which takes both material and geometric nonlinearities into account. The frames are subjected to a number of loading histories, including monotonic proportional and cyclic loads with significant stress reversals beyond the elastic limit. The limit state considered has a major effect on the calculated frame reliability. However, the variation in load path has only a minor effect on behavior, except for cases involving a number of large inelastic reversals of load.

Subject Headings: Structural systems | Cyclic loads | Steel construction | Elastic analysis | Load factors | Structural behavior | Steel structures | Structural reliability

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