Inelastic Buckling of Reinforcing Bars

Bae, Sung Woo; Mieses, Alexa M.; Bayrak, Oguzhan

doi:10.1061/(asce)0733-9445(2005)131:2(314)

Cited by 106 publications

(38 citation statements)

References 6 publications

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“…The design provisions specified in the ACI 318-11 code [46] required a hoop spacing-to-longitudinal bar diameter ratio of less than 6 in potential plastic hinge regions to avoid premature failure induced by longitudinal bar buckling. Similar hoop spacing limits were also recommended by Mander et al [52], Mau and EI-Mabsout [53], Bayrak and Sheikh [54], and Bae et al [55]. For the unretrofitted specimen C0, the hoop spacing-to-longitudinal bar diameter ratio was 8.3 and did not satisfy the hoop spacing limit specified in the ACI 318-11 code [47].…”

Section: Unretrofitted Columnsupporting

confidence: 57%

Seismic retrofit of square reinforced concrete columns using basalt and carbon fiber-reinforced polymer sheets: A comparative study

Ouyang

Gao

Zhen

et al. 2017

Composite Structures

110

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Section: Unretrofitted Columnsupporting

confidence: 57%

Seismic retrofit of square reinforced concrete columns using basalt and carbon fiber-reinforced polymer sheets: A comparative study

Ouyang

Gao

Zhen

et al. 2017

Composite Structures

110

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“…Despite the significant efforts in the past two decades or so in development of buckling models for reinforcing bars and simulation of buckling of reinforcing bars in RC columns [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], there is still not a precise model that has been extensively validated against experimental datasets. To this end, there are two major concerns about the existing models: i) all of the existing models are calibrated based on either experimental and/or numerical stress-strain behaviour of isolated bars that may or may not represent the actual behaviour of embedded reinforcing bars inside concrete, ii) the stress-strain behaviour of reinforcing bars is averaged over the buckling length.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear fibre element modelling of RC bridge piers considering inelastic buckling of reinforcement

Kashani

Lowes

Crewe

et al. 2016

Engineering Structures

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An advanced modelling technique is developed to model the nonlinear cyclic response of circular RC columns using fibre-based section discretisation method. A comparison between different reinforcing steel models is made. Through a comprehensive parametric study the influence of inelastic buckling of vertical reinforcement on the cyclic response of circular RC columns is investigated. The results have been compared and validated against a set of experimental datasets. The proposed calibrated model accounts for the influence of inelastic buckling of vertical reinforcement and interaction of stiffness of horizontal ties reinforcement with vertical reinforcement. The model also accounts for the fracture of vertical bars due to low-cycle high-amplitude fatigue degradation. Therefore, this model is able to predict the nonlinear cyclic response of circular RC columns up to complete collapse. The results show that the existing uniaxial material models of reinforcing bars that are calibrated using stressstrain behaviour of isolated bars cannot represent the behaviour of reinforcing bars inside RC columns. Moreover, it is found that the buckling length of vertical reinforcement has a significant influence on the pinching response of RC columns and also reduces the low-cycle fatigue life of buckled reinforcement.

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“…[44][45][46]). For the present evaluation, the empirical expressions by Yalcin and Saatcioglu [45] have been selected for their simplicity, defining a downscaled stress-strain law for steel in compression, in order to account for the effect of inelastic buckling.…”

Section: Effect Of Longitudinal Reinforcement Bucklingmentioning

confidence: 99%

Numerical study of confinement effectiveness in solid and hollow reinforced concrete bridge piers: Methodology

Papanikolaou

Kappos

2009

Computers & Structures

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a b s t r a c tA consistent methodology is suggested for modelling confinement in both solid and hollow reinforced concrete bridge pier sections, within the computational framework of three-dimensional nonlinear finite element analysis. The ultimate goal is to suggest the most convenient transverse reinforcement arrangements in terms of enhanced strength and ductility, as well as ease of construction and cost-effectiveness. The present study is particularly relevant with respect to confinement of hollow sections, for which previous experimental and analytical research is limited. Constitutive laws, modelling techniques, post-processing issues and preliminary applications are first introduced, and a large parametric model setup for circular and rectangular bridge piers of solid and hollow section, is subsequently presented. A detailed discussion follows on various issues concerning confinement modelling, aiming to broaden the scope and applicability of the suggested methodology. The respective numerical results and their interpretation and evaluation will be presented in a companion paper.

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Inelastic Buckling of Reinforcing Bars

Cited by 106 publications

References 6 publications

Seismic retrofit of square reinforced concrete columns using basalt and carbon fiber-reinforced polymer sheets: A comparative study

Seismic retrofit of square reinforced concrete columns using basalt and carbon fiber-reinforced polymer sheets: A comparative study

Nonlinear fibre element modelling of RC bridge piers considering inelastic buckling of reinforcement

Numerical study of confinement effectiveness in solid and hollow reinforced concrete bridge piers: Methodology

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