СОВРЕМЕННЫЕ ЧИСЛЕННЫЕ МЕТОДЫ МОДЕЛИРОВАНИЯ ТЕПЛОИЗОЛЯЦИИ МНОГОСЛОЙНЫХ КОНСТРУКЦИЙ

This study investigates the thermal insulation performance of modern reinforced concrete ceiling systems and compares the energy efficiency of traditional and contemporary buildings under the TS 825 standard. Five ceiling types, including Smart prestressed and four Teriva ribbed systems, are analyzed through numerical modeling. The Teriva Termo system shows the highest thermal resistance due to its structure and filler material, while the Smart system performs the worst due to air ducts that enhance heat transfer. Numerical simulations using the finite volume method reveal that increasing concrete overlay improves thermal resistance, and they outperform traditional models (e.g., EN ISO 6946) in handling complex geometries. The study also models intumescent coatings for steel fire protection, showing accurate thermal behavior across a five-stage temperature model aligned with experimental data. Finally, energy consumption analyses highlight that only insulated modern buildings meet TS 825 requirements, while uninsulated and traditional buildings fall short. Passive strategies and proper insulation can significantly reduce energy use and improve comfort. The findings support the use of advanced numerical modeling and insulation methods in enhancing building energy performance and safety.