Open Access

ARTICLE

Calculation of Mass Concrete Temperature and Creep Stress under the Influence of Local Air Heat Transfer

by Heng Zhang^1,2, Chao Su^2,*, Xiaohu Chen¹, Zhizhong Song¹, Weijie Zhan³

1 Academy of Science and Technology, Changjiang Institute of Survey Planning Design and Research, Wuhan, 430010, China
2 College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, China
3 Chief Engineer Office, Wujiang Company of Goupitan Power Construction Cooperation, Yuqing, 564408, China

* Corresponding Author: Chao Su. Email:

(This article belongs to the Special Issue: Structural Design and Optimization)

Computer Modeling in Engineering & Sciences 2024, 140(3), 2977-3000. https://doi.org/10.32604/cmes.2024.047972

Received 23 November 2023; Accepted 18 April 2024; Issue published 08 July 2024

Abstract

Temperature-induced cracking during the construction of mass concrete is a significant concern. Numerical simulations of concrete temperature have primarily assumed that the concrete is placed in an open environment. The problem of heat transfer between the air and concrete has been simplified to the concrete’s heat dissipation boundary. However, in the case of tubular concrete structures, where air inlet and outlet are relatively limited, the internal air temperature does not dissipate promptly to the external environment as it rises. To accurately simulate the temperature and creep stress in tubular concrete structures with enclosed air spaces during construction, we establish an air–concrete coupled heat transfer model according to the principles of conjugate heat transfer, and the accuracy of the model is verified through experiments. Furthermore, we conduct a case study to analyze the impact of airflow within the ship lock corridor on concrete temperature and creep stress. The results demonstrate that enhancing airflow within the corridor can significantly reduce the maximum concrete temperature. Compared with cases in which airflow within the corridor is neglected, the maximum concrete temperature and maximum tensile stress can be reduced by 12.5°C and 0.7 MPa, respectively, under a wind speed of 4 m/s. The results of the traditional calculation method are relatively close to those obtained at a wind speed of 1 m/s. However, the temperature reduction process in the traditional method is faster, and the method yields greater tensile stress values for the corridor location.

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Keywords

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