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CLC number: O344

On-line Access: 2014-07-08

Received: 2014-01-18

Revision Accepted: 2014-05-08

Crosschecked: 2014-06-24

Cited: 4

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.7 P.482-495


Influence of actual plastic hinge placement on the behavior of ductile frames

Author(s):  Massimiliano Fraldi, Antonio Gesualdo, Federico Guarracino

Affiliation(s):  . Department of Structural Engineering, University of Naples Federico II, 80125, Napoli, Italy

Corresponding email(s):   fguarrac@unina.it

Key Words:  Steel frames, Limit analysis, Actual plastic hinge localisation, Collapse kinematics

Massimiliano Fraldi, Antonio Gesualdo, Federico Guarracino. Influence of actual plastic hinge placement on the behavior of ductile frames[J]. Journal of Zhejiang University Science A, 2014, 15(7): 482-495.

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A1 - Massimiliano Fraldi
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A1 - Federico Guarracino
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DOI - 10.1631/jzus.A1400031

The ultimate load and collapsing modes of steel frames under combined vertical and horizontal forces are investigated through finite element (FE) modelling and limit analysis. Consideration is given to a frequently overlooked problem which is the kinematics arising from the actual rotation of the plastic hinges under axial force and bending moment. This fact draws attention to the necessity of a careful assessment of the limit analysis approaches, a fact that might be seen as somewhat in line with the outcome from famous paradoxes, such as the one by Stüssi and Kollbrunner (1935), which can only be solved by making reference to both elastic and plastic deformations. As a result, it can be shown that in such a manner, it is possible to obtain a handy tool capable of competing with much more computationally expensive methodologies. The approach may be relevant to practising engineers dealing with code prescriptions and standardization committees.




Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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