High-strength concrete columns confined by low-volumetric-ratio lateral ties

Hong, Ki-Nam; Han, Sang-Hoon; Yi, Seong‐Tae

doi:10.1016/j.engstruct.2006.01.010

Cited by 48 publications

(18 citation statements)

References 5 publications

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“…Thus, because of brittle behaviours of HSRC column, more transverse reinforcement usage had a bigger effect on the behaviours of columns produced by using this concrete. These results were in harmony with other researches' studies (Canbay et al, 2006;Hadi & Li, 2004;Ho & Pam, 2003;Hong et al, 2006;Husem & Pul, 2007).…”

Section: Resultssupporting

confidence: 94%

“…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: 97%

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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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Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 97%

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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“…The corresponding increase rates of ultimate capacity are 17%, 14%, 8%, 6%, and 4.5% for both ring and spiral columns with concrete strength of 25 MPa, 40 MPa, 80 MPa, 120 MPa, and 200 MPa, respectively. Obviously, the external confinements have lower influence on columns with higher concrete strength because higher strength concrete has lower lateral expansion at the early loading phase [37,38].…”

Section: Influence Of Concrete Gradementioning

confidence: 99%

Explicit Simulation of Circular CFST Stub Columns with External Steel Confinement under Axial Compression

et al. 2019

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Concrete-filled steel tube (CFST) structural members have been widely used in engineering projects for their superior strength and ductility. However, the different lateral dilation characteristics between concrete infill and steel tube have caused imperfect composite interaction during the early loading stage. To overcome this issue, external steel confinements in the form of rings and spiral were previously suggested to minimise the lateral expansion of the steel tube and enhance the concrete confinement effects. This study presented the analytical behaviour of circular CFST short columns with an external ring or spiral confinements which are subjected to axial loading. An explicit finite element (FE) model was developed and verified based on previous experimental findings. Besides that, this study analysed the failure modes, axial load–strain relationship, stress distributions, and bond strength of the composite column components. Parametric analysis was also undertaken to evaluate the impact of material strengths, total steel ratio, and diameter-to-thickness ratio. The results suggest that the use of external steel confinement can enhance the compressive behaviour of CFSTs better than increasing the thickness of the steel tube when using the same steel ratio. Finally, simplified design formulations were developed to accurately calculate the ultimate capacity of CFST columns with and without external steel confinement.

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“…However, the ductility increased when it is properly confined such as by fiber-reinforced polymer, concrete-filled tube, composite jacket, steel strapping tensioning technique, etc. [1][2][3][4][5][6][7][8][9][10][11][12][13]. Unless the compressive test is able to generate accurate and meaningful stress-strain curve, the ductility profile cannot be fully utilized.…”

Section: Introductionmentioning

confidence: 99%

Derivation of Complete Stress–Strain Curve for SSTT-Confined High-Strength Concrete in Compression

Lee

Awang

Omar

et al. 2018

Journal of Testing and Evaluation

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For concrete structural behavior analysis, the complete axial stress-strain curves in compression can be determined by using a closed-loop servo-controlled hydraulic testing machine. The applied loading as well as the axial deformation reading of the loaded concrete specimen is recorded from the built-in displacement transducers or externally installed transducers placed between the machine platens. However, the recorded axial strain in the ascending branch is not purely concrete deformations but includes some additional deformation because of machine flexibility and specimen's end restraint. Strain gauges can be diametrically installed at the middle of specimen for a more precise deformation reading but additional costs are required for the gauges and data acquisition system. Moreover, the concrete stress-strain curve and ductility performance beyond its ultimate is difficult to be recorded without special strain measuring devices. Hence, a correction equation is needed to account for these effects to obtain the complete stress-strain curves for unconfined and confined concrete. In this paper, a total number of 84 unconfined and steel strapping tensioning techniques (SSTTs) confined high-strength concrete cylinders of compressive strength ranging from 62.48 MPa to 184.85 MPa were tested in compression in accordance with ASTM C39/C39M-11. The details for the testing setup, testing machine, strain measuring instruments, loading rate, loading patterns, etc. are described and at the same time a correction factor equation is proposed in this paper. KeywordsComplete stress-strain relationship, uniaxial compression load test, correction factor derivation, high-strength concrete, steel strapping tensioning technique (SSTT)

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High-strength concrete columns confined by low-volumetric-ratio lateral ties

Cited by 48 publications

References 5 publications

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

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

Explicit Simulation of Circular CFST Stub Columns with External Steel Confinement under Axial Compression

Derivation of Complete Stress–Strain Curve for SSTT-Confined High-Strength Concrete in Compression

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