Effect of Cooling by Water Flowing in Nonmetal Pipes Embedded in Mass Concrete

Zhu, Bin

doi:10.1061/(asce)0733-9364(1999)125:1(61)

Cited by 38 publications

(23 citation statements)

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“…e simulation of the pipe cooling effect is a challenging problem in temperature field simulation of the concrete structures [10][11][12][13][14][15][16]. In general, two main calculation methods exist for analyzing the pipe cooling effect [10][11][12]: the finite element method (FEM) of pipe cooling and the equivalent heat conduction method (EHCM) of pipe cooling. In the first method, to reflect the large temperature gradient near cooling pipes, finite elements near the cooling pipes are densely meshed, and the iterative method is used to calculate the change of temperature along the cooling pipes caused by heat exchange between the concrete and the cooling water.…”

Section: Simulation Analysis Principle For the Temperature Field And mentioning

confidence: 99%

“…In the other method, cooling pipes are taken as a negative heat source to consider the effect of pipe cooling in an average manner, and the temperature field can be obtained using a general FEM mesh instead of dense finite elements. At this point, the equivalent heat transfer equation for the water pipe cooling is [11,12] …”

Section: Simulation Analysis Principle For the Temperature Field And mentioning

confidence: 99%

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Optimization of Temperature‐Control Measures for Concrete Structures: A Case Study of the Sluice Project

Huang

2018

Advances in Civil Engineering

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Temperature control and crack prevention in sluice pier concrete is a key issue in the early design and construction period. Strong surface insulation may lead to cracks after formwork removal, while weak surface insulation may result in a high crack risk in the early age. e water-cooling measure may also cause severe cracks at a rapid cooling rate. erefore, the optimum temperature control scheme should be comparatively studied against the alternatives. In this paper, we investigate crack prevention in sluice pier concrete as a multiple-factor system optimization problem and investigate an optimization method for temperature-control measures using the uniform design method and a neural network model. e minimum ratios for the internal and surface points of the sluice pier concrete are taken as inputs, and the corresponding combinations of temperature-control parameters based on the uniform design method are taken as outputs. Combined with a sluice project, the optimization method for the temperaturecontrol measures is implemented. e analysis results show that internal pipe cooling combined with reasonable surface heat preservation measures should be employed, and a low concrete pouring temperature is more beneficial than a low cooling temperature and long duration for crack prevention in sluice pier concrete.

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Section: Simulation Analysis Principle For the Temperature Field And mentioning

confidence: 99%

Section: Simulation Analysis Principle For the Temperature Field And mentioning

confidence: 99%

Optimization of Temperature‐Control Measures for Concrete Structures: A Case Study of the Sluice Project

Huang

2018

Advances in Civil Engineering

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“…Most large mass concrete structures rely on metal pipes to cool the internal temperature due to its high thermal conductivity. A study conducted by Zhu [11] illustrated the calculations formulas needed to replace metal pipe systems with nonmetal ones. The study presented different formulas for computing the radius of pipes, horizontal spacing between pipes, and the time required to decrease the temperature to a specified degree for different types of pipes.…”

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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“…Neglecting the temperature gradient in the direction of the cooling pipe, Zhu [6] introduced the effect of the cooling pipes as a negative heat source and proposed an equivalent heat conduction method (EHCM) to calculate the temperature variation in mass concrete with conventional finite element mesh. Although this is an approximation method, it requires only simple programming and exhibits high computational efficiency.…”

Section: Introductionmentioning

confidence: 99%

Precise simulation analysis of the thermal field in mass concrete with a pipe water cooling system

Liu

Zhang

Chang

et al. 2015

Applied Thermal Engineering

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Effect of Cooling by Water Flowing in Nonmetal Pipes Embedded in Mass Concrete

Cited by 38 publications

References 1 publication

Optimization of Temperature‐Control Measures for Concrete Structures: A Case Study of the Sluice Project

Optimization of Temperature‐Control Measures for Concrete Structures: A Case Study of the Sluice Project

Construction methods used for controlling temperature in mass concrete structure

Precise simulation analysis of the thermal field in mass concrete with a pipe water cooling system

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