Thermal Cracking Analysis during Pipe Cooling of Mass Concrete Using Particle Flow Code

Li, Liang; Liu, Xinghong; Dao, Vinh; Cheng, Yonggang

doi:10.1155/2016/5976862

Cited by 9 publications

(7 citation statements)

References 16 publications

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“…The 2D particle flow was used to model a concrete slab that has a length of 1 meter and width of 0.5 m. The study concluded that thermal cracks might occur if the temperature of the cooling water is too low or the temperature gradient between the concrete and the cooling pipes is high. Bond breakages was observed where thermal cracks occurred [17].…”

Section: Post-cooling Of Concretementioning

confidence: 99%

Construction methods used for controlling temperature in mass concrete structure

Abdel-Raheem¹,

Quintana²,

Morales³

et al. 2018

Creative Construction Conference 2018 - Proceedings

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The hydration of cement can release a substantial amount of heat that can be problematic in mass concrete structure. This heat of hydration (HH) can produce thermal stresses that can crack the concrete and compromise the integrity of the structure leading to its failure. Throughout the years, different methods have been developed in order to mitigate the negative effects of the HH on mass concrete structures. This study presents a comprehensive review of the previous methods documented in the literature that have been utilized in controlling the temperature rise due to the HH in mass concreting. The reviewed methods were divided into two main categories, namely supplementary material and construction methods. This paper focuses on the different methods of construction that are used to control the temperature rise in mass concrete structures. The paper also presents an analysis of these methods using findings from previous studies.

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Section: Post-cooling Of Concretementioning

confidence: 99%

Construction methods used for controlling temperature in mass concrete structure

Abdel-Raheem¹,

Quintana²,

Morales³

et al. 2018

Creative Construction Conference 2018 - Proceedings

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show abstract

“…ere is a large error between the temperature field of the dam reconstructed by the temperature extrapolation method and the actual temperature field of the dam. e other is using the numerical simulation method to establish the temperature field of the in-service concrete arch dam [15][16][17][18][19][20]. e temperature field of the concrete arch dam changes with the surrounding environment due to the actions of convection, radiation, and evaporative cooling.…”

Section: Introductionmentioning

confidence: 99%

Temperature Field Online Reconstruction for In-Service Concrete Arch Dam Based on Limited Temperature Observation Data Using AdaBoost-ANN Algorithm

Chen

Zheng

et al. 2021

Mathematical Problems in Engineering

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Temperature is one of the factors affecting the safety operation of concrete arch dams. To accurately reconstruct the temperature field of the concrete arch dam online based on the temperature data of several typical dam sections, this paper proposes the AdaBoost-ANN algorithm. The algorithm uses artificial neural network (ANN) to establish a training set of the measured temperature data and the temperature field of the concrete arch dam obtained by the three-dimensional finite element model; these trained artificial neural networks are used as weak classifiers of the AdaBoost algorithm. Then, the AdaBoost-ANN algorithm is used to establish the mapping relationship between the measured temperature data and the temperature field, and the online reconstruction of the temperature field of the concrete arch dam is realized. The case study shows that the temperature field of the concrete arch dam can be accurately established by AdaBoost-ANN algorithm based on limited temperature observation data. The algorithm is more time-saving and labor-saving than the finite element method and is convenient for online reconstruction of the temperature field and assessment of the safety status of the concrete arch dam.

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“…Regrettably, the equivalent approach cannot describe the sharp temperature gradient around the cooling pipe and the temperature rise of water flow along the pipeline. While, many engineering examples show that a sharp cooling may produce a large global temperature gradient and tensile stress, which may lead to the generation and expansion of cracks from inside [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Precise Simulation of Heat-Flow Coupling of Pipe Cooling in Mass Concrete

Bie

et al. 2021

Materials

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For a long time, temperature control and crack prevention of mass concrete is a difficult job in engineering. For temperature control and crack prevention, the most effective and common-used method is to embed cooling pipe in mass concrete. At present, there still exists some challenges in the precise simulation of pipe cooling in mass concrete, which is a complex heat-flow coupling problem. Numerical simulation is faced with the problem of over-simplification and inaccuracy. In this study, precise simulation of heat-flow coupling of pipe cooling in mass concrete is carried out based on finite element software COMSOL Multiphysics 5.4. Simulation results are comprehensively verified with results from theoretical solutions and equivalent algorithms, which prove the correctness and feasibility of precise simulation. Compared with an equivalent algorithm, precise simulation of pipe cooling in mass concrete can characterize the sharp temperature gradient around cooling pipe and the temperature rise of cooling water along pipeline more realistically. In addition, the cooling effects and local temperature gradient under different water flow (0.60 m3/h, 1.20 m3/h, and 1.80 m3/h) and water temperature (5 °C, 10 °C, and 15 °C) are comprehensively studied and related engineering suggestions are given.

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Thermal Cracking Analysis during Pipe Cooling of Mass Concrete Using Particle Flow Code

Cited by 9 publications

References 16 publications

Construction methods used for controlling temperature in mass concrete structure

Construction methods used for controlling temperature in mass concrete structure

Temperature Field Online Reconstruction for In-Service Concrete Arch Dam Based on Limited Temperature Observation Data Using AdaBoost-ANN Algorithm

Precise Simulation of Heat-Flow Coupling of Pipe Cooling in Mass Concrete

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