Shakedown of Strain-Hardening Structures

by John D. Meyer, Looper; Fabricated Steel Constr., Bethlehem Steel Corp., Pinole Point, CA,

Serial Information: Journal of the Structural Division, 1972, Vol. 98, Issue 1, Pg. 95-110

Document Type: Journal Paper


Elastic perfectly plastic theory predicts progressive permanent deformations of statically indeterminate structure with each cycle of variable repeated loading above the so-called shakedown load. Experimental evidence of this behavior, however, is contradictory. In an effort to explain some of the observed discrepancies, a theory of incremental deformations is developed which includes the effects of strain hardening of the material. On the basis of calculations, the importance of strain-hardening is assessed, and results of two earlier test programs are used to verify the validity of the approach. On the basis of comparison of analytical and experimental results, it is concluded that strain-hardening must be included for realistic prediction of the incremental deformations of steel structures.

Subject Headings: Strain hardening and softening | Steel structures | Repeated loads | Elastoplasticity | Dead loads | Elastic analysis

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