Computers and Concrete

  • 제15권1호
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  • Pages.103-126
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  • 2015
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

An improved 1D-model for computing the thermal behaviour of concrete dams during operation. Comparison with other approaches

  • Santillan, D. (Technical University of Madrid, Department of Civil Engineering: Hydraulic and Energy Engineering) ;
  • Saleteb, E. (Technical University of Madrid, Department of Civil Engineering: Hydraulic and Energy Engineering) ;
  • Toledob, M.A. (Technical University of Madrid, Department of Civil Engineering: Hydraulic and Energy Engineering) ;
  • Granados, A. (Technical University of Madrid, Department of Civil Engineering: Hydraulic and Energy Engineering)
  • 투고 : 2014.06.10
  • 심사 : 2014.11.03
  • 발행 : 2015.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Thermal effects are significant loads for assessing concrete dam behaviour during operation. A new methodology to estimate thermal loads on concrete dams taking into account processes which were previously unconsidered, such as: the evaporative cooling, the night radiating cooling or the shades, has been recently reported. The application of this novel approach in combination with a three-dimensional finite element method to solve the heat diffusion equation led to a precise characterization of the thermal field inside the dam. However, that approach may be computationally expensive. This paper proposes the use of a new one-dimensional model based on an explicit finite difference scheme which is improved by means of the reported methodology for computing the heat fluxes through the dam faces. The improved model has been applied to a case study where observations from 21 concrete thermometers and data of climatic variables were available. The results are compared with those from: (a) the original one-dimensional finite difference model, (b) the Stucky-Derron classical one-dimensional analytical solution, and (c) a three-dimensional finite element method. The results of the improved model match well with the observed temperatures, in addition they are similar to those obtained with (c) except in the vicinity of the abutments, although this later is a considerably more complex methodology. The improved model have a better performance than the models (a) and (b), whose results present larger error and bias when compared with the recorded data.

키워드

과제정보

연구 과제번호 : Desarrollo del Software iCOMPLEX para el control y evaluacion de la seguridad de infraestructuras criticas

연구 과제 주관 기관 : Ministerio de Economia y Competitividad

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  1. A new 1D analytical model for computing the thermal field of concrete dams due to the environmental actions vol.85, 2015, https://doi.org/10.1016/j.applthermaleng.2015.04.023
  2. A methodology for the assessment of the effect of climate change on the thermal-strain–stress behaviour of structures vol.92, 2015, https://doi.org/10.1016/j.engstruct.2015.03.001
  3. A Positioning Method of Temperature Sensors for Monitoring Dam Global Thermal Field vol.7, pp.None, 2020, https://doi.org/10.3389/fmats.2020.587738
  4. Thermal Simulation of Rolled Concrete Dams: Influence of the Hydration Model and the Environmental Actions on the Thermal Field vol.12, pp.3, 2015, https://doi.org/10.3390/w12030858
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  6. Temperature Field Online Reconstruction for In-Service Concrete Arch Dam Based on Limited Temperature Observation Data Using AdaBoost-ANN Algorithm vol.2021, pp.None, 2015, https://doi.org/10.1155/2021/9979994