oa Civil Engineering = Siviele Ingenieurswese - Calculation of inelastic displacements in plastic analysis
|Article Title||Calculation of inelastic displacements in plastic analysis|
|© Publisher:||South African Institution Of Civil Engineering (SAICE)|
|Journal||Civil Engineering = Siviele Ingenieurswese|
|Affiliations||1 Civil Engineering Department, University of the Witwatersrand, Johannesburg|
|Publication Date||Jan 1999|
|Pages||7 - 13|
|Keyword(s)||Calculation, Inelastic displacements and Plastic analysis|
It is increasingly important in plastic analysis of structures to assess the required plastic hinge rotations implicit in ensuring a ductile mode of failure. The displacements of a frame at the onset of plastic collapse also provide a useful limit in second-order, inelastic, stability analysis. A method is descriptionbed for systematically applying the principle of virtual work to the calculation of notional plastic hinge rotations and deflections during the development of a collapse mechanism. Approaches to combining independent mechanisms of collapse, assessing the first and last hinges to form and calculating indeterminate moments in partial collapse mechanisms are also descriptionbed based on flexibility-based analysis.
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