Axial compressive stress-strain relation and Poisson effect of structural lightweight aggregate concrete

Han, Bing; Xiang, Tianyu

doi:10.1016/j.conbuildmat.2017.04.101

Cited by 31 publications

(16 citation statements)

References 16 publications

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“…Ovaj model uvodi pretpostavku o nelinearnom ponašanju materijala. Veza napon-dilatacija lakoagregatnog betona pri pritisku je definisana prema [6] izrazom: The CDP material model was used for the purpose of modelling the concrete cylinder and cube. This model introduces the assumption of nonlinear material behaviour.…”

Section: Materials Modelmentioning

confidence: 99%

“…This model introduces the assumption of nonlinear material behaviour. The stress-strain relationship of lightweight concrete due to the compression is defined according to [6]: (3) gde su E0 inicijalni modul elastičnosti, Es sekantni modul elastičnosti koji odgovara maksimalnom naponu i odgovarajućoj dilataciji, εcu dilatacija koja odgovara maksimalnom naponu, a α parametar koji kontroliše oblik krive, čija je vrednost usvojena prema [6] i iznosi 1.5.…”

Section: Materials Modelunclassified

“…where E0is the initial modulus of elasticity, Es is the secant modulus of elasticity corresponding to the maximum stress and the corresponding strain, εcu is the strain corresponding to the maximum stress, and α is the parameter controlling the shape of the curve, whose value is adopted according to [6] and equals to 1.5.…”

Section: Materials Modelmentioning

confidence: 99%

See 2 more Smart Citations

Numerical simulation of the behaviour of the lightweight concrete specimen in the laboratory testing

Živaljević¹,

Kovačević²,

Lukić³

et al. 2019

Građ materijali i konstrukcije

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Section: Materials Modelmentioning

confidence: 99%

Section: Materials Modelunclassified

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Numerical simulation of the behaviour of the lightweight concrete specimen in the laboratory testing

Živaljević¹,

Kovačević²,

Lukić³

et al. 2019

Građ materijali i konstrukcije

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“…Concrete is a construction material that is widely used in all civil engineering applications . The use of normal weight concrete significantly increases the demand of normal weight aggregate (NWAs) thus resulting in a significant decrease in natural stone deposits and damages to the natural ecosystem . In addition, the use of NWAs is also not favorable for tall buildings, long span bridges or floating structures as they increase the structures self‐weight .…”

Section: Introductionmentioning

confidence: 99%

“…1 The use of normal weight concrete significantly increases the demand of normal weight aggregate (NWAs) thus resulting in a significant decrease in natural stone deposits and damages to the natural ecosystem. 2,3 In addition, the use of NWAs is also not favorable for tall buildings, long span bridges or floating structures as they increase the structures self-weight. 4,5 The use of high-strength lightweight concrete with typical strengths that vary between 34 and 69 MPa is one of the means of overcoming such limitations.…”

mentioning

confidence: 99%

Effects of silica fume fineness on mechanical properties of steel fiber reinforced lightweight concretes subjected to ambient and elevated temperatures exposure

Arel

Shaikh

2018

Structural Concrete

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This paper presents the effects of silica fume (SF) fineness and fiber aspect ratios of steel fiber on fresh and harden characteristics of high‐strength lightweight concrete containing oil palm shell as coarse aggregates. The effect of elevated temperatures on the residual compressive strength of above concretes is also evaluated in this study. Three different SF fineness of 18 400, 21 000, and 28 000 m2/kg and 2 different aspect ratios of steel fiber of 40 and 80 are considered. Results show that the increase in SF fineness and steel fiber aspect ratio marginally affect the air‐dry density of steel fiber reinforced lightweight high‐strength concretes, however, the workability is reduced by about 9% to 14% due to increase in SF fineness. The compressive strength of steel fiber reinforced lightweight concretes at all age increases with increase in SF fineness and an improvement of about 37% is observed at 56 days by increasing the SF fineness from 18 400 to 28 000 m2/kg. Strong correlations are also observed between the strength improvement factor and the SF fineness. Water absorption of above concretes is also reduced by 3% to 14% due to increase of SF fineness from 18 400 to 21 000 and 28 000 m2/kg. The increase of SF fineness also significantly reduces the residual compressive strength loss at 300°C and 450°C. This loss of residual compressive strength is lower in lightweight concretes containing 16 mm long steel fiber than 8 mm long steel fiber. The existing Eurocode model overestimates the residual compressive strength of steel fiber reinforced lightweight concretes containing no SF, however, this discrepancy is significantly reduced with increase in SF fineness.

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Impact of aggregate content and tube thickness on semi‐lightweight aggregate concrete filled steel tube subjected to uniaxial compression

Zhao

Xiang

et al. 2021

Structural Concrete

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Artificial lightweight aggregates (LWA) generally can be more deformable in lateral expansion than that of natural crushed stone. Therefore, concrete made of LWA can exhibit a higher Poisson effect, and this characteristic could be advantageously used in the confined elements. In the present study, experimental research on behaviors of semi‐lightweight aggregate concrete filled steel tube (LWACFT) under axial compression is performed, in which the key parameters such as the volume content of LWA and the thickness of steel tube are involved. The results showed that the bearing capacity of LWACFT columns is influenced by the compressive strength and Poisson effect of LWAC in dual‐facets. With a rational LWA volume fraction, the bearing capacity of LWACFT columns is not less than that of traditional CFT. Furthermore, the experimental results of bearing capacity are compared with the results by current design codes. With the volume content of LWA and the steel thickness as the variable, the modified and simplified models have been proposed to predict the axial load versus strain curves and the bearing capacity of LWACFT columns. The research results have demonstrated that the predicted results by the model proposed in this study agree well with the experimental ones.

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Axial compressive stress-strain relation and Poisson effect of structural lightweight aggregate concrete

Cited by 31 publications

References 16 publications

Numerical simulation of the behaviour of the lightweight concrete specimen in the laboratory testing

Numerical simulation of the behaviour of the lightweight concrete specimen in the laboratory testing

Effects of silica fume fineness on mechanical properties of steel fiber reinforced lightweight concretes subjected to ambient and elevated temperatures exposure

Impact of aggregate content and tube thickness on semi‐lightweight aggregate concrete filled steel tube subjected to uniaxial compression

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