Analytical Investigation of Thermomechanical Stability in High-Performance Eco-Concrete Panels Incorporating Waste Glass Powder: A Linear Thermoelastic Plate-Buckling Approach
DOI:
https://doi.org/10.66104/jk6j3w04Keywords:
Waste glass powder; Eco-concrete; Thermomechanical buckling; Critical temperature; High-performance concrete; Sustainability.Abstract
The increasing demand for sustainable construction materials has encouraged the use of recycled industrial and municipal waste in concrete technology. Waste glass powder (WGP) is considered a promising supplementary cementitious material because it may contribute to cement reduction and waste valorization. This study investigates the thermomechanical buckling behavior of thin high-performance eco-concrete panels incorporating WGP under uniform thermal loading. A linear thermoelastic analytical formulation based on classical small-deflection plate theory is adopted to determine the critical buckling temperature difference, ΔTcr, of simply supported rectangular panels. The analysis considers the influence of the width-to-length ratio, b/a, thickness-to-length ratio, h/a, Poisson’s ratio, and WGP content. In the present model, the effect of WGP is represented through Young’s modulus and Poisson’s ratio, while the thermal expansion coefficient is assumed constant. The results show that ΔTcr decreases as the panel becomes thinner and as the b/a ratio increases. For the reference case, ΔTcr decreases from 156.6°C to 87.1°C for h/a=1/30, and from 69.6°C to 38.7°C for h/a=1/45, when b/a increases from 1 to 3. The incorporation of WGP produces a limited but consistent increase in thermal buckling resistance. For square panels, high-performance concrete containing 20% and 30% WGP shows slightly higher critical temperatures than the reference high-performance concrete, mainly due to the reduction in Poisson’s ratio. These findings indicate that WGP-modified high-performance concrete may offer a moderate improvement in the thermal buckling stability of idealized thin simply supported panels. However, the conclusions remain limited to the assumptions of linear thermoelastic behavior, homogeneous material properties, constant thermal expansion coefficient, and uniform thermal loading.
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