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<p>This study aims to evaluate the structural and thermal performance of Polystyrene-Integrated CLT (P-CLT) panels, a hybrid system formed by integrating expanded (EPS) and extruded (XPS) polystyrene foam into the middle layer of cross-laminated timber (CLT) panels. Six P-CLT and CLT panels (54 × 1200 × 2400&#xa0;mm) were tested for lateral load performance, and nine specimens (54 × 300 × 300&#xa0;mm) were used for thermal conductivity measurements. P-CLT panels increased thermal insulation performance while maintaining load-bearing capacity, reducing thermal conductivity by 16.1% (EPS) and 19.9% (XPS). In lateral load tests, CLT panels reached 72.02 kN, while EPS- and XPS-integrated panels were 36% and 7% lower, respectively. Both hybrid panel types showed 47–50% higher displacement, indicating more ductile behavior. Stiffness was highest for CLT panels (3.44 kN/mm), while EPS and XPS panels measured 1.35 and 1.09 kN/mm, consistent with previous studies. Energy simulations showed that P-CLT panels, particularly with XPS, reduced heating energy demand by 9–12%, while uninsulated CLT systems increased demand by up to 46%. The P-CLT system provides a cost-effective sustainable solution for construction and renovation, representing one of the first experimental and simulation-based assessments of combined structural and thermal performance in hybrid CLT panels.</p>

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Evaluation of structural and thermal performance of polystyrene integrated cross laminated timber panels

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月26日

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  • Esra Lakot Alemdağ,
  • Okan İlhan,
  • Ayça Akkan Çavdar,
  • Abdullah Uğur Birinci,
  • Hasan Öztürk,
  • Aydın Demir,
  • Cenk Demirkır,
  • Ahmet Can Altunışık,
  • Engin Derya Gezer,
  • Algıhan Kaşif Karahasan,
  • Emre Küçükbekir

摘要

This study aims to evaluate the structural and thermal performance of Polystyrene-Integrated CLT (P-CLT) panels, a hybrid system formed by integrating expanded (EPS) and extruded (XPS) polystyrene foam into the middle layer of cross-laminated timber (CLT) panels. Six P-CLT and CLT panels (54 × 1200 × 2400 mm) were tested for lateral load performance, and nine specimens (54 × 300 × 300 mm) were used for thermal conductivity measurements. P-CLT panels increased thermal insulation performance while maintaining load-bearing capacity, reducing thermal conductivity by 16.1% (EPS) and 19.9% (XPS). In lateral load tests, CLT panels reached 72.02 kN, while EPS- and XPS-integrated panels were 36% and 7% lower, respectively. Both hybrid panel types showed 47–50% higher displacement, indicating more ductile behavior. Stiffness was highest for CLT panels (3.44 kN/mm), while EPS and XPS panels measured 1.35 and 1.09 kN/mm, consistent with previous studies. Energy simulations showed that P-CLT panels, particularly with XPS, reduced heating energy demand by 9–12%, while uninsulated CLT systems increased demand by up to 46%. The P-CLT system provides a cost-effective sustainable solution for construction and renovation, representing one of the first experimental and simulation-based assessments of combined structural and thermal performance in hybrid CLT panels.