Evaluation of Current Crack Width Calculation Methods According to Eurocode 2 and fib Model Code 2010

Tan, Reignard; Hendriks, Max A.N.; Kanstad, Terje

doi:10.1007/978-3-319-59471-2_185

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…The calculated characteristic crack width (W2) is regularly defined as the 95% quantile for the statistical variation when assuming a lognormal distribution. 48 This can be interpreted as the crack width at the 95% fractile of the crack widths, which can be expected in a reinforced or prestressed member. 49 Beeby defined w k using an 80% quantile, reasoning that the reduced quantile was appropriate since the 5% probability of exceedance is too small to pose a risk of corrosion or seriously impair appearance.…”

Section: Crack Width Definitionmentioning

confidence: 99%

“…The calculated characteristic crack width (W2) is regularly defined as the 95% quantile for the statistical variation when assuming a lognormal distribution 48 . This can be interpreted as the crack width at the 95% fractile of the crack widths, which can be expected in a reinforced or prestressed member 49 .…”

Section: Representation Of Formulas For Calculating Crack Width and S...mentioning

confidence: 99%

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Categorization of formulas for calculation of crack width and spacing in reinforced concrete elements

van der Esch,

Wolfs,

Fennis

et al. 2023

Structural Concrete

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Over the last century, over one hundred crack width formulas have been developed to calculate the width and spacing of cracks in reinforced and prestressed concrete elements. It is unclear which formulas are the most accurate. An extensive comparison study is required to determine which formulas accurately describe the crack patterns, consisting of the crack width and spacing. To make such a study possible, this paper proposes categorizing formulas. The categorization of the formulas is based on their applicability, crack pattern representation, and background. The categorization presents an overview of the different assumptions and application areas for describing crack patterns.

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Section: Crack Width Definitionmentioning

confidence: 99%

Section: Representation Of Formulas For Calculating Crack Width and S...mentioning

confidence: 99%

Categorization of formulas for calculation of crack width and spacing in reinforced concrete elements

van der Esch,

Wolfs,

Fennis

et al. 2023

Structural Concrete

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“…Figure 1 represents the cracking behaviour of an RC tie subjected to pure tension, according to Beeby [33]. The stress in the rebar starts affecting the concrete surface after 'KC' ('K' is a constant and 'C' is cover) distance [34][35][36] from the specimen end, and it takes another S0 distance to uniformly distribute the stress along the cross section. When the applied force increases from zero, the highest stress occurs at the concrete surface after KC+So distance (transfer length) and beyond.…”

Section: Cracking Phenomenon Of Rc Members Subjected To Service Loadmentioning

confidence: 99%

Applicability of Existing Crack Controlling Criteria for Structures with Large Concrete Cover Thickness

Naotunna

Samarakoon

Fosså

2021

Nordic Concrete Research

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Widely used crack width calculation models and allowable crack width limits have changed from time to time and differ from region to region. It can be identified that some crack width calculation models consist with limitations for parameters like cover thickness. The current Norwegian requirement for cover thickness is larger than these limitations. The applicability of existing crack width calculation models and the allowable crack width limits must be verified for structures with large cover thickness. The background of crack width calculation models in Eurocode, Model Code 2010, Japanese code, American code and British code have been examined. By comparing the experimental crack widths with the predictions of the aforementioned models, the existing codes can be identified as requiring modification. Considering the durability aspect, it can be identified a long-term study proving that the allowable crack width can be increased with the increase in cover thickness. When considering the aesthetic aspect, the authors suggest categorizing the structures based on their prestige level and deciding the allowable crack widths accordingly. The paper proposes potential solutions for future research on how to improve both crack width calculation methods and allowable crack width limits to be used effectively in structures with large cover thickness.

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“…According to the most code requirements, the designer shall today calculate the crack width at the surface, that is, position (b) from Figure . According to NS 3473, and the Norwegian annex to EC2, the crack width requirement is linearly increased with the ratio between the distance from the reinforcement to (b) and (c) if one chooses to increase the cover relative to the minimum cover requirement from a durability perspective.…”

Section: Literature Reviewmentioning

confidence: 99%

A review of literature and code requirements for the crack width limitations for design of concrete structures in serviceability limit states

Basteskår¹,

Engen

Kanstad

et al. 2019

Structural Concrete

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This paper includes a critical review of the literature related to design of reinforced concrete structures in the serviceability limit state (SLS), and attempts to tie the results to code requirements. The main attention is given to the so‐called controllable cracks, defined as cracks due to imposed loads or deformations on hardened concrete or restrained volume changes in young hardening concrete that a structural engineer has the knowledge and tools to predict and control. It is suggested that more consistent procedures are introduced into the future SLS‐design. It is found necessary to more clearly distinguish the crack width requirements for aesthetic reasons from durability and tightness reasons, and clarify the use of the term durability in the code text. The research leading up to current leakage prediction formulas and tightness formulas is questioned based on the literature review. It is discussed that a differentiation of the crack width through a cross section will facilitate a more consistent treatment and limitation of crack widths.

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Evaluation of Current Crack Width Calculation Methods According to Eurocode 2 and fib Model Code 2010

Cited by 7 publications

References 7 publications

Categorization of formulas for calculation of crack width and spacing in reinforced concrete elements

Categorization of formulas for calculation of crack width and spacing in reinforced concrete elements

Applicability of Existing Crack Controlling Criteria for Structures with Large Concrete Cover Thickness

A review of literature and code requirements for the crack width limitations for design of concrete structures in serviceability limit states

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