Higher-order non-linear analysis of steel structures. Part II : refined plastic hinge formulation

Iu, C.K. & Bradford, M.A. (2012) Higher-order non-linear analysis of steel structures. Part II : refined plastic hinge formulation. Advanced Steel Construction, 8(2), pp. 183-198.

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Abstract

In the companion paper, a fourth-order element formulation in an updated Lagrangian formulation was presented to handle geometric non-linearities. The formulation of the present paper extends this to include material non-linearity by proposing a refined plastic hinge approach to analyse large steel framed structures with many members, for which contemporary algorithms based on the plastic zone approach can be problematic computationally. This concept is an advancement of conventional plastic hinge approaches, as the refined plastic hinge technique allows for gradual yielding, being recognized as distributed plasticity across the element section, a condition of full plasticity, as well as including strain hardening. It is founded on interaction yield surfaces specified analytically in terms of force resultants, and achieves accurate and rapid convergence for large frames for which geometric and material non-linearity are significant. The solutions are shown to be efficacious in terms of a balance of accuracy and computational expediency. In addition to the numerical efficiency, the present versatile approach is able to capture different kinds of material and geometric non-linearities on general applications of steel structures, and thereby it offers an efficacious and accurate means of assessing non-linear behaviour of the structures for engineering practice.

Impact and interest:

6 citations in Scopus
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5 citations in Web of Science®

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ID Code: 67075
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: beam-column, interaction surface, refined plastic hinge method, material nonlinearity, strain-hardening
ISSN: 1816-112X
Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Numerical Analysis (010301)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000) > ENGINEERING DESIGN (120400) > Engineering Design Methods (120403)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 The Hong Kong Institute of Steel Construction
Deposited On: 09 Feb 2014 23:49
Last Modified: 15 Apr 2014 13:49

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