Research on the Inversion of Equivalent Surface Heat Transfer Coefficient of Mass Concrete by Calculating its Heat Flux

Abstract:

Most of the cracks on concrete dam are external ones, while external heat preservation is an important measure to prevent cracking. In order to obtain the actual thermal parameters, according to thermal conduction theory and the temperature distribution conditions of optical fiber on concrete surface, the surface temperature distribution of concrete pouring deck was real-time monitored by setting optical fiber in different depths; then the surface heat flux of mass concrete was calculated, thereby the equivalent surface heat transfer coefficient, which varied as time goes, was inversed. It is indicated that the inversion process is relatively simple and reliable, and the heat transfer coefficient obtained can well reflect the real performance of the insulation materials. Meanwhile, it is also indicated that the heat transfer coefficient of equivalent surface varies as time goes, which can contribute to back analysis calculation and actual engineering practice.

• Periodical: Applied Mechanics and Materials (Volume 188)
• Pages: 264-269
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.188.264
• Online since: June 2012
• Authors: Li Xin Qu, Yi Hong Zhou, Yao Ying Huang, Guo Qing Tang, Shao Wu Zhou
• Keywords: Distributed Temperature Sensing, Equivalent Surface Heat Transfer Coefficient, Heat Flux, Mass Concrete

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