Thermal deformation coordination analysis of CC-RCC combined dam structure during construction and operation periods

Li, Mingchao; Si, Wen; Du, Shengli; Zhang, Mengxi; Ren, Qingying; Shen, Yang

doi:10.1016/j.engstruct.2020.110587

Cited by 21 publications

(7 citation statements)

References 17 publications

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“…The last decades have marked a substantial progress in this field, especially in modelling of the coupled thermal-mechanical behaviour of mass concrete structures. Currently, highly sophisticated methods already exist for transient thermal-structural analyses of concrete dams allowing for modelling of these coupled processes during both construction and subsequent operation periods of a dam [16]. Case studies also were successfully covered by such analyses, e.g.…”

Section: Development and Calibration Of The Computational Modelmentioning

confidence: 99%

Formulation of parameter limit values for the operation of a large concrete gravity dam

Todorov¹,

Petkova

Kisliakov

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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This study presents a coupled thermal-structural finite element analysis of a large concrete gravity dam in Bulgaria for exploring the dam response under different actual load combinations. The loads applied to the structure are caused by varying water level in the reservoir and ambient temperature typical for the respective seasons. The developed computational model was calibrated with real plumb measurements. Based on the performed analyses in the ANSYS environment, key limit values for the horizontal displacements measured by the plumbs in the dam as possibly caused by extreme combinations of ambient temperature and water level are formulated for further improvement of the dam operation.

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Section: Development and Calibration Of The Computational Modelmentioning

confidence: 99%

Formulation of parameter limit values for the operation of a large concrete gravity dam

Todorov¹,

Petkova

Kisliakov

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…During the construction period, the temperature field of the dam body is affected by multiple factors, such as cement hydration heat, artificial cooling, and ambient temperature. In the stage of operation, cement hydration heat has basically dissipated, and the temperature field is affected by ambient temperature, e.g., air temperature and water temperature [43][44][45][46]. Concrete temperature has a significant impact on the stability of the dam during the construction period, but its effects during regular operation afterward are essentially insignificant.…”

Section: Tfe Constructionmentioning

confidence: 99%

Research on Temperature Control Index for High Concrete Dams Based on Information Entropy and Cloud Model from the View of Spatial Field

Yang,

Sun,

Zhang

et al. 2023

Water

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It is significant to adopt scientific temperature control criteria for high concrete dams in the construction period according to practical experience and theoretical calculation. This work synthetically uses information entropy and a cloud model and develops novel in situ observation data-based temperature control indexes from the view of a spatial field. The order degree and the disorder degree of observation values are defined according to the probability principle. Information entropy and weight parameters are combined to describe the distribution characteristics of the temperature field. Weight parameters are optimized via projection pursuit analysis (PPA), and then temperature field entropy (TFE) is constructed. Based on the above work, multi-level temperature control indexes are set up via a cloud model. Finally, a case study is conducted to verify the performance of the proposed method. According to the calculation results, the change law of TFEs agrees with actual situations, indicating that the established TFE is reasonable, the application conditions of the cloud model are wider than those of the typical small probability method, and the determined temperature control indexes improve the safety management level of high concrete dams. Research results offer scientific reference and technical support for temperature control standards adopted at other similar projects.

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“…Zhong et al [9] introduced an improved composite element method (CEM) for simulating the temperature field in large concrete blocks with embedded cooling pipes. Li et al [10] used the finite element method to calculate the temperature stress field during the construction and operation of dams, providing a theoretical basis for temperature control and crack prevention in dams. Temperature is also a major factor affecting the displacement of concrete gravity dams, making accurate estimation of temperature effects crucial for the structural safety of concrete gravity dams [11].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Data Mining Analysis for Long-Term Temperature-Stress-Strain Monitoring Data of a Concrete Gravity Dam

Zhou,

Ma,

et al. 2024

Water

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The safety condition of concrete gravity dams is influenced by multiple factors, and assessing their safety solely based on a single factor is difficult to comprehensively evaluate. Therefore, this paper proposes a comprehensive modeling and analysis approach to assess dam safety by considering long-term temperature, stress, and strain monitoring data of actual concrete gravity dams. Firstly, the K-means clustering algorithm is utilized to classify the data. Then, the study area of the dam is meshed and three indicator evaluation values for all the elements are calculated. The other elements’ evaluation values can be obtained by the Inverse Distance Weighting (IDW) method. Finally, the analytic hierarchy process extended by the D numbers preference relation (D-AHP) method is applied to compute the weights of temperature, stress, and strain and evaluate the dam’s safety comprehensively. The effectiveness of this method is validated through application to specific engineering cases. The results demonstrate that compared to assessing methods considering only single factors, the comprehensive evaluation method proposed in this paper can more comprehensively and accurately reflect the actual safety condition of concrete gravity dams, providing important references for engineering decision-making.

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Thermal deformation coordination analysis of CC-RCC combined dam structure during construction and operation periods

Cited by 21 publications

References 17 publications

Formulation of parameter limit values for the operation of a large concrete gravity dam

Formulation of parameter limit values for the operation of a large concrete gravity dam

Research on Temperature Control Index for High Concrete Dams Based on Information Entropy and Cloud Model from the View of Spatial Field

Modeling and Data Mining Analysis for Long-Term Temperature-Stress-Strain Monitoring Data of a Concrete Gravity Dam

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