2012
DOI: 10.1680/stbu.2012.165.1.27
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A generic unified reinforced concrete model

Abstract: The behaviour of reinforced concrete members with ductile steel reinforcing bars at the ultimate limit state is extremely complex. Consequently, there has been a tendency for the seemingly disparate research areas of flexure, shear and confinement to follow separate paths in order to develop safe approaches to design. In this paper, it is shown how the already much researched and established, but somewhat peripheral, areas of reinforced concrete research of shear friction, partial interaction and rigid body di… Show more

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Cited by 19 publications
(11 citation statements)
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“…These results are exactly the same as those obtained from the corollary of the Euler‐Bernoulli theorem, which is a strain‐based M /χ approach. However, the convenience of this displacement‐based approach is that it can incorporate both concrete softening [28–31], which is not covered as this is a serviceability paper, and discrete cracking, as will be explained later.…”
Section: M/θ Analysis Prior To Crackingmentioning
confidence: 99%
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“…These results are exactly the same as those obtained from the corollary of the Euler‐Bernoulli theorem, which is a strain‐based M /χ approach. However, the convenience of this displacement‐based approach is that it can incorporate both concrete softening [28–31], which is not covered as this is a serviceability paper, and discrete cracking, as will be explained later.…”
Section: M/θ Analysis Prior To Crackingmentioning
confidence: 99%
“…This displacement‐based approach was first developed for beams reinforced with either steel or FRP [19–25] and then extended for both the short‐term loading of PC beams [26] and the long‐term loading of ungrouted PC beams [27]. The benefit of the M /Θ approach is that it can directly simulate the mechanisms associated with tension stiffening and also concrete softening [28–31], which is in contrast to the M /χ approach, which requires empiricisms to allow for these mechanisms. Furthermore, the purely mechanics‐based M /Θ results can be easily converted to moment/equivalent curvatures and, consequently, equivalent flexural rigidities EI equ that can be used in standard strain‐based design practices.…”
Section: Introductionmentioning
confidence: 99%
“…The localised nature of these deformations makes the behaviour of RC members extremely complex as it is these localised behaviours that control the global behaviour of RC members. Thus it is very important that these behaviours are simulated (Oehlers, 2010a;Oehlers et al, 2011aOehlers et al, , 2011bOehlers et al, , 2012 in order to accurately replicate the global behaviours.…”
Section: Introductionmentioning
confidence: 99%
“…The analysis could be repeated for increasing rotations to quantify the relationship between M and θ as in Figure 3(a) where O-A are the results prior to cracking and O-B are the results after cracking. The problem here is that there is no transition from O-A to O-B that is a strain based approach cannot quantify tension stiffening (Oehlers 2010;Oehlers et al 2011aOehlers et al , 2012a. It will be shown later that the incorporation of partial-interaction theory into the moment-rotation analysis will be used to find a mechanics solution and, furthermore, that this mechanics approach can be used to include residual strains.…”
mentioning
confidence: 99%