Shakedown under Elastic Support Conditions

by Irving J. Oppenheim, (A.M.ASCE), Assoc. Prof. of Architecture and Civ. Engrg.; Carnegie-Mellon Univ., Pittsburgh, Pa.,

Serial Information: Journal of the Structural Division, 1980, Vol. 106, Issue 7, Pg. 1417-1422

Document Type: Journal Paper


A two span beam with a central elastic support was analyzed for incremental collapse under two loading conditions. In each case a modest support flexibility increased the shakedown load until it equalled the static collapse load. Further reduction of support stiffness then produced a dramatic decrease in the collapse load. Incremental collapse is a more significant factor in the design of structures with elastic supports than it is in the design of conventional structures.

Subject Headings: Failure loads | Elastic analysis | Structural failures | Plastic design | Beams | Stiffening | Load factors

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