Strain and Temperature Monitoring in Early-Age Concrete by Distributed Optical Fiber Sensing

Berrocal, Carlos Gil; Fernandez, Ignasi; Löfgren, Ingemar; Nordström, Erik; Rempling, Rasmus

doi:10.1007/978-3-031-33211-1_82

Cited by 3 publications

(8 citation statements)

References 8 publications

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“…1 and has been reported in various research studies [19][20][21][22][23][24][25][26][27][28][29][30]. The phenomenon has garnered significant attention globally, with the cause of cracking believed to be attributed to the effects of concrete shrinkage and temperature differences, particularly during the early stages when these effects are most pronounced [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Analysis Of Crack Formation In Concrete Structuresmentioning

confidence: 99%

“…The crack width can be calculated by multiplying the slipping distance with the deformation caused by temperature, as expressed in Eqn. (12).…”

Section: Determination Of Deformation Due To Temperature Differencesmentioning

confidence: 99%

“…This difference indicates a divergence in temperatures between the two materials, leading to an increase in the slip force within the range, l s,max . The temperature difference also plays a crucial role in influencing crack formation in immature concrete [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Either the heat of hydration of concrete or variations in outdoor temperature cause the temperature differences [3,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Determination Of Deformation Due To Temperature Differencesmentioning

confidence: 99%

“…The temperature difference also plays a crucial role in influencing crack formation in immature concrete [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Either the heat of hydration of concrete or variations in outdoor temperature cause the temperature differences [3,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. In the context of hydration heat, temperatures recorded in laboratory environments or actual construction sites, especially for larger structures, can reach up to 90°C [4][5][6][7][8]…”

Section: Determination Of Deformation Due To Temperature Differencesmentioning

confidence: 99%

“…These factors are most impactful during the initial stages of the concrete's life [4][5][6][7]. Many studies have analyzed crack formation to reduce its occurrence in this phase [8][9][10][11][12][13][14][15]. In fact, cracks can still form in areas not primarily responsible for cracking due to excessive loading, even after the concrete has fully hardened.…”

Section: Introductionmentioning

confidence: 99%

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An investigation of cracks caused by concrete shrinkage and temperature difference in common reinforced concrete bridge structures.

Nguyen

2024

Frattura Ed Integrità Strutturale

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Cracking phenomena commonly occur in reinforced concrete structures of bridge and culvert components. While some bridge design standards, such as the AASHTO LRFD standard from America, allow for the presence of cracks, they do not provide direct quantitative limits on permissible crack widths. This research analyzes the crack formation mechanism of reinforced concrete structures under the influence of shrinkage and temperature loading, using the "tension-chord" model from the fib MODEL CODE. The research findings demonstrate that despite the steel reinforcement adequately arranged to resist shrinkage and temperature, as per American bridge design standards, cracks frequently occur with widths that may exceed the allowable limits specified in the fib MODEL CODE. The main reason is the inadequate control of concrete construction temperature, especially for large-sized concrete structures. Other findings are: with the same steel ratio, using small diameter reinforcement can significantly reduce the crack width compared to larger ones; Increasing the steel ratio can reduce the crack width but increases the susceptibility to cracking; Crack does not occur immediately after maintenance completion but after a period ranging from several days to several months; Crack width due to concrete shrinkage and temperature changes is typically 0.3mm but may reaches to 0.7mm due to high hydration heat of large sizes structures.

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Section: Analysis Of Crack Formation In Concrete Structuresmentioning

confidence: 99%

“…The crack width can be calculated by multiplying the slipping distance with the deformation caused by temperature, as expressed in Eqn. (12).…”

Section: Determination Of Deformation Due To Temperature Differencesmentioning

confidence: 99%

Section: Determination Of Deformation Due To Temperature Differencesmentioning

confidence: 99%

Section: Determination Of Deformation Due To Temperature Differencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An investigation of cracks caused by concrete shrinkage and temperature difference in common reinforced concrete bridge structures.

Nguyen

2024

Frattura Ed Integrità Strutturale

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Online corrosion management based on the situation of long-cycle operation of oil refining chemical plants

Du,

Li,

Liu

et al. 2023

Advances in Social Science, Education and Humanities Research

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Long-cycle operation of a plant can help enterprises reduce costs and increase efficiency and improve economic benefits, and has now become a goal for enterprises to pursue, but to achieve long-cycle operation of a plant requires the joint efforts of all parties. This paper analyzes the basic conditions needed to achieve long-cycle operation, starting from the development history of the operation cycle of China's oil refining and chemical plants. And focus on the analysis of online corrosion management in the device's long-cycle operation of the important role, and application scenarios. And the current online inspection means for different damage modes are introduced, hope that this paper can make you an in-depth understanding of the common technical means of online corrosion management and its important role in the long-cycle operation of the device.

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Phân tích vết nứt do co ngót bê tông và nhiệt độ thay đổi trong các kết cấu cầu bê tông cốt thép phổ biến tại Việt Nam

Nguyễn Văn

2023

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Hiện tượng nứt trong kết cấu bê tông cốt thép ở các bộ phận công trình cầu cống xảy ra phổ biến. Trong khi tiêu chuẩn thiết kế cầu Việt Nam hiện nay tuy cho phép vết nứt xuất hiện nhưng lại không định lượng về bề rộng vết nứt cho phép. Nội dung nghiên cứu này phân tích cơ cấu hình thành vết nứt theo mô hình thanh chịu kéo trong kết cấu bê tông cốt thép dưới tác động của tải trọng co ngót và nhiệt độ. Kết quả nghiên cứu cho thấy, mặc dù bố trí thép đảm bảo theo yêu cầu chống co ngót và nhiệt độ theo tiêu chuẩn thiết kế cầu hiện tại, hiện tượng nứt có thể dễ dàng xảy ra với kết cấu bê tông và bề rộng vết nứt lớn hơn bề rộng ở quy định hiện hành cho phép. Lý do chính là nếu việc kiểm soát nhiệt độ thi công bê tông không tốt. Việc bố trí thép có đường kính nhỏ sẽ làm giảm độ mở rộng vết nứt đáng kể hơn là thép đường kính lớn hơn mà có cùng hàm lượng thép. Việc bố trí nhiều thép có thể làm vết nứt có bề rộng nhỏ nhưng kết cấu lại dễ nứt hơn. Thời điểm vết nứt thường không xuất hiện ngay sau khi kết thúc bảo dưỡng mà sau đó khoảng từ vài ngày đến vài tháng

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Strain and Temperature Monitoring in Early-Age Concrete by Distributed Optical Fiber Sensing

Cited by 3 publications

References 8 publications

An investigation of cracks caused by concrete shrinkage and temperature difference in common reinforced concrete bridge structures.

An investigation of cracks caused by concrete shrinkage and temperature difference in common reinforced concrete bridge structures.

Online corrosion management based on the situation of long-cycle operation of oil refining chemical plants

Phân tích vết nứt do co ngót bê tông và nhiệt độ thay đổi trong các kết cấu cầu bê tông cốt thép phổ biến tại Việt Nam

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