Techno Press
Techno Press

Structural Engineering and Mechanics   Volume 51, Number 1, July10 2014, pages 163-180
DOI: http://dx.doi.org/10.12989/sem.2014.51.1.163
 
Treatment of locking behaviour for displacement-based finite element analysis of composite beams
R. Emre Erkmen, Mark A. Bradford and Keith Crews

 
Abstract     [Full Text]
    In the displacement based finite element analysis of composite beams that consist of two Euler-Bernoulli beams juxtaposed with a deformable shear connection, the coupling of the displacement fields may cause oscillations in the interlayer slip field and reduction in optimal convergence rate, known as sliplocking. In this study, the B-bar procedure is proposed to alleviate the locking effects. It is also shown that by changing the primary dependent variables in the mathematical model, to be able to interpolate the interlayer slip field directly, oscillations in the slip field can be completely eliminated. Examples are presented to illustrate the performance and the numerical characteristics of the proposed methods.
 
Key Words
    composite beam; slip-locking; B-bar formulation; change of primary variables
 
Address
R. Emre Erkmen, Keith Crews : School of Civil and Environmental Engineering, University of Technology, Sydney, NSW 2007, Australia
Mark A. Bradford: School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
 

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