Determination of crack spacing and crack width in reinforced concrete beams

Piyasena, R.; Loo, Yew‐Chaye; Fragomeni, Sam

doi:10.12989/sem.2003.15.2.159

Cited by 13 publications

(8 citation statements)

References 3 publications

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“…Models by Zhang et al [30] and De Lorenzis and Nanni [31] yielded results that were in better agreement with the minimum crack spacing observed for B-NSM beams, albeit the latter slightly overestimated, while values provided from the model by Piyasena et al [29] were comparable with the ones observed for S-NSM beams. Perhaps the crack spacing of S-NSM beams can be evaluated using the same equation as that for internally reinforced beams, adapted to account for the mechanical and bond properties of NSM.…”

Section: Evaluation Of Crack Spacingsupporting

confidence: 54%

“…Moreover, Fig. 10 indicates that the cut-off length ∆l possibly influences the crack spacing, a parameter currently not accounted for by existing equations for predicting crack spacing in B-NSM beams [29][30][31].…”

Section: End Anchorage Longitudinal Crack Spacingmentioning

confidence: 99%

“…Zhang et al [30] proposed a similar equation for T UVW , however ^ = 0.28 ′ and the total NSM groove perimeter are used instead of and ∑ a , respectively. Other equations for predicting the crack spacing of NSM strengthened beams have been proposed by Piyasena et al [29]. For the sake of brevity, they are not shown here.…”

Section: Evaluation Of Crack Spacingmentioning

confidence: 99%

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Strengthening of RC beams using bottom and side NSM reinforcement

Sabău

Popescu

Schmidt³

et al. 2018

Composites Part B: Engineering

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The allowable strain in fibre reinforced polymers reinforcement is limited by design codes to avoid debonding. The near-surface mounted (NSM) reinforcement technique has been proven to produce better anchorage behaviour compared to externally bonded reinforcement solutions. However, NSM solutions do not always eliminate debonding issues, with concrete cover detachment (CCD) typically occurring in RC beams strengthened for flexure. This experimental study investigated the efficiency of side mounted (S) compared to bottom mounted (B) NSM bars to prevent CCD. The experimental results were compared to models available in the literature that predict the observed failure modes and the crack spacing in the NSM anchorage zone. Compared to B-NSM, the S-NSM solution was successful in avoiding brittle CCD failure and showed increased rotational capacity and energy dissipation at failure. Existing CCD debonding models were found to be conservative.

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Section: Evaluation Of Crack Spacingsupporting

confidence: 54%

Section: End Anchorage Longitudinal Crack Spacingmentioning

confidence: 99%

See 1 more Smart Citation

Strengthening of RC beams using bottom and side NSM reinforcement

Sabău

Popescu

Schmidt³

et al. 2018

Composites Part B: Engineering

View full text Add to dashboard Cite

show abstract

“…Generally, the role of reinforcement is to limit crack width and improve bending deflection [10], but its "crack resistance" role is not obvious [11], so it is difficult to give full play to the advantages of reinforcement. In China's existing specifications [12], the configuration of steel bars is only to consider its "crack limit" function, with a certain number of temperature reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Creep Behaviour of Reinforced Concrete Beam under Long-Term Bending

Xin

Liu

Zhang

et al. 2022

J. Phys.: Conf. Ser.

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Concrete structure after casting will be subjected to external load, peripheral components and other constraints, the overall performance of the structure under a long-term loading state will change continuously. In practical engineering, reinforcement is usually calculated and configured based on external load, but the role of reinforcement in the continuous loading process of concrete structure is not fully considered. Based on the elastic creep theory, this paper deduces the concrete creep calculation formula considering the influence of reinforcement, and analyses the law of the influence of reinforcement ratio and loading age on the strain and stress of concrete. The results show that the reinforcement can effectively restrain the deformation of concrete and reduce the load level of concrete.

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“…As a matter of fact, concrete structures after casting undergo changing environment and are impacted by external and internal restraints continuously [4]. Concrete creep theory has been improved and supplemented for decades [5][6][7] and a numerous of researchers studied the mechanical behavior of reinforced concrete [8][9][10][11][12]. [1] This paper presents a method for calculation of concrete creep behavior under long-term loading and effect of reinforcement on concrete stress and strain has been quantitatively assessed by introducing a reinforcement impact factor.…”

Section: Introductionmentioning

confidence: 99%

Analysis of effect of reinforcement on concrete creep behavior

Xin¹,

Li²,

Huang³

2015

Proceedings of the 2015 International Conference on Advances in Mechanical Engineering and Industrial Informatics

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Considerable deformation generates when concrete is with long-term loading and creep is one of the most important time-dependent behaviors and needs to be paid enough attention. It is of great important to understand the workability and liability of structures under long-term loading. This paper presents a method for calculation of concrete stress and strain considering effect of reinforcement and factor of reinforcement ratio has been considered. Results show that concrete stress can be reduced to some extent when reinforcement is placed under long-term loading and a reinforcement ratio of 3% is favorable. In addition, a reinforcement impact factor is recommended to quantify effect of reinforcement on concrete creep behavior.

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Determination of crack spacing and crack width in reinforced concrete beams

Cited by 13 publications

References 3 publications

Strengthening of RC beams using bottom and side NSM reinforcement

Strengthening of RC beams using bottom and side NSM reinforcement

Creep Behaviour of Reinforced Concrete Beam under Long-Term Bending

Analysis of effect of reinforcement on concrete creep behavior

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