Published Resources Details
Journal Article
- Title
- Plastic analysis of rigid frames of high-strength steel accounting for deformation effects
- In
- Civil Engineering Transactions
- Imprint
- vol. CE9, no. 1, Apr 1967, pp. 127-
- Description
[This paper was jointly awarded The Institution Award 1967]
- Abstract
A method of analysis is described for directly determining the mode of plastic failure and the load factor at failure of plane steel frameworks of rigid construction. Deformations caused by both working and failure loads and plastic hinge rotations at failure are calculated by a process which is based upon a displacement method of elastic-plastic analysis first proposed by C. K. Wang. The method is ideally suited to computer processing for complex frames and it can be cycled so that equilibrium may be formulated for the deformed rather than the unloaded shape of a frame. In this way, the effect of deformation moments on the plastic failure load can be assessed quite accurately. This type of information has hitherto been available only for a limited range of rigid portal frames. Axial as well as flexural strains are accounted for, but not the influence of strain hardening. The method has been developed as part of a study of the application of plastic design to slender frameworks in high-strength steels. Results of analysis are given for portal frames with pinned and fixed bases and studies have also been made of a four-storey, single-bay rigid frame.