Research on Thermal Cracking of a Rectangular RC Tank Wall under Construction. I: Case Study

Seruga, Andrzej; Zych, Mariusz

doi:10.1061/(asce)cf.1943-5509.0000704

Cited by 12 publications

(8 citation statements)

References 5 publications

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“…What is more, due to tank's leak tightness, cracks in a well‐designed, construction joint do not matter because of sealing strips and waterproofing materials. Seruga and Zych, presented the results of studies carried out on real structures, which illustrate the development of cracking in vertical construction joints of cylindrical and rectangular tank walls and cracking of these walls. The studies show, for instance, that cracking of a construction joint always occurs and precedes potential segment cracking.…”

Section: Straight Wall Segment Restrained Along Three Edgesmentioning

confidence: 99%

“…A practical aspect of the analysis conducted is the possibility to define much smaller values of R ax for upper parts of walls, which directly leads to considerable reinforcement steel savings in these areas. This fact is confirmed by the research results, where a significantly smaller crack width or a lack of cracking is observed in the upper parts of segments. The values of coefficients R ax presented in Figure for a stable Δ T value can also be defined on the basis of Table .…”

Section: Straight Wall Segment Restrained Along Three Edgesmentioning

confidence: 99%

“…The studies performed by Seruga and Zych, whose subject were rectangular and cylindrical reinforced concrete tanks cast on the leveling plate or foundation footing, show that cracks initially occur at the height of about 1 m to proceed upwards and downwards. Works present the application of advanced numerical models in the calculations taking into account this phenomenon.…”

Section: Introduction To the Degree Of Tensile Restraintmentioning

confidence: 99%

See 2 more Smart Citations

Degree of external restraint of wall segments in semi‐massive reinforced concrete tanks: Part I rectangular segments

Zych

2017

Structural Concrete

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This paper presents graphs and formulas serving to define the distribution of the restraint degree of wall segments in rectangular reinforced concrete tanks. The most frequent cases occurring in engineering practice are analyzed, that is, wall segments erected during the first concreting stage and those restrained along three edges. For the latter ones, this paper defines the influence of vertical stiffness in construction joints (depending on the reinforcement degree) on the distribution of the restraint degree. This paper shows a substantial impact of the temperature profile (i.e., imposed strain resulting from the development of hydration heat) on the area where cracks occur first, and on the value and distribution of tensile stresses. A practical aspect of the analysis performed is the possibility of defining the restraint degree for cases and assumptions not included in EN 1992–3.

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Section: Straight Wall Segment Restrained Along Three Edgesmentioning

confidence: 99%

Section: Straight Wall Segment Restrained Along Three Edgesmentioning

confidence: 99%

Section: Introduction To the Degree Of Tensile Restraintmentioning

confidence: 99%

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Degree of external restraint of wall segments in semi‐massive reinforced concrete tanks: Part I rectangular segments

Zych

2017

Structural Concrete

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“…As shown by Zych [19], in some calculation cases these calculation models render more accurate results than the model included in [3]. Seruga and Zych [20], [21] provide thorough research results pertaining to semi-massive RC tank walls cracking due to imposed strain. For example, the papers present both particular cracking stages and crack spacing, and strain distribution and development depending to a large extent on amount of reinforcement, restraint scheme and solar radiation.…”

Section: Early-age Crackingmentioning

confidence: 99%

Modification of the simplified method of crack control included in EN 1992‐3

Zych

2016

Structural Concrete

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Modification of the simplified method of crack control included in EN 1992-3The methods of crack control for liquid-retaining RC tank walls are analysed taking into account external load (EN 1992-1-1) and imposed strain occurring at the construction stage (EN 1992-3), i.e. during the concrete-hardening period. The convergence ranges of the simplified method of crack control included in EN 1992-3 and the detailed calculation methods included in EN 1992-1-1 and EN 1992-3 are defined. Apart from the compatibility areas, overestimation of the acceptable reinforcing bar diameter ϕ s * , illustrated in Fig. 7.103N in EN 1992-3, was proved. Coefficients k ϕ1 and k ϕ2 are defined, which enable the calculation of the acceptable reinforcing bar diameter ϕ s * in order to obtain the values complying with the direct calculations. For practical purposes, graphs have been plotted to facilitate the definition of coefficients k ϕ1 and k ϕ2 without performing direct calculations. On the basis of the analyses performed and the relations proposed, it can be concluded that there is a possibility or a necessity to increase or decrease the acceptable reinforcing bar diameter ϕ s * depending on the concrete mechanical properties and geometrical properties of an RC tank wall.

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“…This phenomenon is affected by, inter alia, water-cement ratio, type and amount of aggregate, cement type, concrete strength, admixtures used, the operation conditions and the duration and type of concrete curing in the early stages of hardening [12,13]. This is when concrete is particularly susceptible to shrinkage cracking.…”

Section: Concrete Shrinkage and Creepmentioning

confidence: 99%

Analysis of Rheological Phenomena in Reinforced Concrete Cross-section of Rędziński Bridge Pylon based on in Situ Measurements

Bednarski

Sieńko

Howiacki

2015

Procedia Engineering

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The creep of concrete is a phenomenon that is often the cause of excessive deformation of the structure in serviceability limit state. In fact, creep strains are generally larger than elastic strains which occur on the application of load. Creep is affected by many factors both internal -related to the properties of specific concrete and external -related to the operating environment. In addition, attention should be paid to the fact that in real structures concrete almost always interacts with the reinforcement. This article examines the rheological phenomena that occur in the reinforced concrete cross-section of the Rędziński Bridge pylon in Wrocław, using in situ measurements from an automated structural health monitoring system.

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Research on Thermal Cracking of a Rectangular RC Tank Wall under Construction. I: Case Study

Cited by 12 publications

References 5 publications

Degree of external restraint of wall segments in semi‐massive reinforced concrete tanks: Part I rectangular segments

Degree of external restraint of wall segments in semi‐massive reinforced concrete tanks: Part I rectangular segments

Modification of the simplified method of crack control included in EN 1992‐3

Analysis of Rheological Phenomena in Reinforced Concrete Cross-section of Rędziński Bridge Pylon based on in Situ Measurements

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