Concrete-based structural elements, particularly reinforced concrete elements, retain significant moisture, necessitating coupled thermal-hydro-mechanical analyses. Solving the governing equations for these multi-phase problems can be computationally intensive, and the reliability of results in simplified forms remains uncertain, highlighting the need for careful input parameter evaluation. Usually, the analysis begins with heat transfer, producing the temperature field, followed by mass transfer, where the pressure field plays a critical role. These fields interact, influencing physical parameters and potentially causing thermal-hydro spalling, which can alter the boundaries and geometry of the cross-section, impacting subsequent non-linear mechanical analyses. Pore pressure in critical regions serves as a key factor in assessing the sensitivity of these phenomena. This study presents a physical, mathematical, and numerical approach to conduct a coupled and uncoupled thermal and mass transfer analysis with reviews of existing and proposed analytical and parametric models, comparing their objectives, limitations, and applications to provide a clearer understanding of the physics parameters involved.

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Comparative Analysis of Physical Parameters Affecting Heat and Mass Transfer in Reinforced-Concrete Elements

  • Lajos Imre,
  • Cosmin Gruia Chiorean

摘要

Concrete-based structural elements, particularly reinforced concrete elements, retain significant moisture, necessitating coupled thermal-hydro-mechanical analyses. Solving the governing equations for these multi-phase problems can be computationally intensive, and the reliability of results in simplified forms remains uncertain, highlighting the need for careful input parameter evaluation. Usually, the analysis begins with heat transfer, producing the temperature field, followed by mass transfer, where the pressure field plays a critical role. These fields interact, influencing physical parameters and potentially causing thermal-hydro spalling, which can alter the boundaries and geometry of the cross-section, impacting subsequent non-linear mechanical analyses. Pore pressure in critical regions serves as a key factor in assessing the sensitivity of these phenomena. This study presents a physical, mathematical, and numerical approach to conduct a coupled and uncoupled thermal and mass transfer analysis with reviews of existing and proposed analytical and parametric models, comparing their objectives, limitations, and applications to provide a clearer understanding of the physics parameters involved.