Effectiveness of adding confinement for ductility improvement of high-strength concrete columns

Ho, J.C.M.; Lam, J. Y. K.; Kwan, A.K.H.

doi:10.1016/j.engstruct.2009.11.017

Cited by 92 publications

(26 citation statements)

References 35 publications

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“…Section analysis with the assumption ''plane sections remain plane before and after loading'' is often adopted to analyse the peak strength and various load-deformation relations of beams and columns [11,[25][26][27]. For FRP-confined rectangular concrete columns under axial loading, where the concrete is under triaxial stress state, the development of confining stresses within the concrete section involves complicated interaction mechanism between the concrete and the FRP.…”

Section: Methods Of Analysismentioning

confidence: 99%

Finite element analysis of axially loaded FRP-confined rectangular concrete columns

Kwan

Ouyang

et al. 2015

Engineering Structures

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Section: Methods Of Analysismentioning

confidence: 99%

Finite element analysis of axially loaded FRP-confined rectangular concrete columns

Kwan

Ouyang

et al. 2015

Engineering Structures

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“…There are a lot of researches on the RC structure members produced using HSC. For example, Ahmed and Shah (1982), Mander, Priestley, and Park (1988), Saatcioglu and Razvi (1992), Cusson and Paultre (1994), Diniz and Frangopol (1997), Foster and Attard (1997), Légeron and Paultre (2003), Hadi and Li (2004), Ho and Pam (2003), Husem and Pul (2007), Canbay, Ozcebe, and Ersoy (2006), Hong, Han, and Yi (2006), Ho, Lam, and Kwan (2010) have investigated the behaviour of columns under the axial load experimentally and theoretically. Few of these studies were carried out on a full-scale test samples.…”

Section: Introductionmentioning

confidence: 98%

The behaviour of high-strength reinforced concrete columns under low eccentric loading

Hüsem

Pul

Görkem

et al. 2015

European Journal of Environmental and Civil Engineering

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In this study, the change of the behaviour of high-strength reinforced concrete (HSRC) columns under axial and eccentric load based on the ratios of transversal and longitudinal reinforcements was investigated. To do this, 2100 mm height and 200 mm × 300 mm cross-sectional sizes reinforced concrete columns which have different transversal and longitudinal reinforcement ratios were produced with highstrength concrete. On these produced columns, two different eccentricity (e = 25 mm and e = 50 mm) and axial (e = 0) loadings were done. The experimental and theoretical moment-curvature (M-K) relations were determined and compared with each other. Test results showed that in the HSRC columns, the ratio of longitudinal reinforcement did not changed the fracture type which was brittle, but when the ratio of transversal reinforcement increased, the type of fracture was changed. The M-K relation obtained from the experiments and the M-K relation calculated theoretically were in harmony. This showed that the material model which was used to determine theoretical M-K relation was suitable for HSRC.

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“…Traditionally in reinforced concrete structures, this is provided by installing closely spaced transverse steel (Ho and Pam, 2003;Mander et al, 1988). However, as the efficiency of transverse reinforcement dropped significantly with the increase in concrete strength (Ho et al, 2010), this form of confinement will result in serious steel congestion that adversely affects the concrete placing quality, and is not applicable to confine UHSC. To effectively confine UHSC and at the same time maintain concrete placing quality, concrete-filled steel tube (CFST) construction has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Curvature-relevant analysis of eccentrically loaded circular concrete-filled steel tube columns

Ouyang¹,

2014

Magazine of Concrete Research

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The existence of curvature can reduce the effective confining pressure within concrete-filled steel tube (CFST) columns under eccentric compression. The existing analysis method ignores such an effect and still treats the confining pressure as constant across the whole section as if it is under axial compression. In this paper, the authors have made significant improvements on the existing model, so that the curvature effect can be taken into account to properly interpret the non-linear behaviour of eccentrically loaded CFST columns. Meanwhile, shortening between two hinges is an important data output in test programmes of this type, which has been completely neglected by the existing analysis method. This improved method also provides calculation steps to track the value of shortening for each load increment. Unknown parameters in this new method are determined on the basis of data fitting of 87 specimens from previous researchers' test programmes. The following parameters are incorporated in this study: effective tube length (660–4670 mm), diameter of tube (76–600 mm), tube thickness (1·52–8·81 mm), yield strength of tube (256·4–517·0 MPa), cylinder strength of concrete (26·42–112·70 MPa) and eccentricity (9·4–300 mm). The load–axial displacement, load–deflection and moment–curvature curves predicted by the new method agree well with their measured counterparts in the tests.

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Effectiveness of adding confinement for ductility improvement of high-strength concrete columns

Cited by 92 publications

References 35 publications

Finite element analysis of axially loaded FRP-confined rectangular concrete columns

Finite element analysis of axially loaded FRP-confined rectangular concrete columns

The behaviour of high-strength reinforced concrete columns under low eccentric loading

Curvature-relevant analysis of eccentrically loaded circular concrete-filled steel tube columns

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