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Optimization and performance analysis of novel waste EPS bead-sand composite cushions for rockfall mitigation: An integrated experimental and numerical study.

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Názov: Optimization and performance analysis of novel waste EPS bead-sand composite cushions for rockfall mitigation: An integrated experimental and numerical study.
Autori: Meree, Hani1 (AUTHOR), Wang, Dongpo1 (AUTHOR) wangdongpo@cdut.edu.cn, Yan, Shuaixing1 (AUTHOR), Lambert, Stéphane2 (AUTHOR), Chen, Yanhao1 (AUTHOR), Dong, Qi1 (AUTHOR)
Zdroj: Geotextiles & Geomembranes. Dec2025, Vol. 53 Issue 6, p1314-1331. 18p.
Predmety: *SUSTAINABLE design, *ROCKSLIDES, *ABSORPTION, *MATHEMATICAL optimization, *COMPUTER simulation, *WASTE products, *COMPOSITE materials, *STRUCTURAL stability
Abstrakt: Orthogonal Experimental Design (OED) and Response Surface Methodology (RSM) optimized waste Expanded Polystyrene (EPS) bead-sand composite cushions, identifying an optimal EPS content of 38.79 % by volume for superior energy absorption and load distribution. The novel SE-S-F layered configuration (EPS-sand mixture over pure sand) reduced RC slab tension damage by 79.7 % compared to traditional sand cushions and crack width by 92.3 % relative to the EPS-sand mixture, surpassing monolithic designs. It minimized transmitted forces, accelerations, and energy dissipation while promoting flexural cracking for enhanced structural protection. Validated numerical simulations accurately modeled impact dynamics, enabling reliable performance predictions. Successive impact tests confirmed the SE-S-F configuration's multi-impact resistance, achieving a non-dimensional factor (Ω) of 1.47 by the fifth impact, outperforming geofoam-based designs. Repurposing waste EPS, this approach delivers lightweight, sustainable, and cost-effective rockfall protection systems, enhancing safety in mountainous regions and transportation corridors. • Optimal EPS-sand cushion (38.79 % EPS) via OED & RSM enhances rockfall protection. • SE-S-F layered cushion cuts RC slab damage by 67 % vs. sand, improves energy dissipation. • Validated numerical model optimizes design; waste EPS use aids sustainable rockfall mitigation. [ABSTRACT FROM AUTHOR]
Databáza: Academic Search Index
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Abstrakt:Orthogonal Experimental Design (OED) and Response Surface Methodology (RSM) optimized waste Expanded Polystyrene (EPS) bead-sand composite cushions, identifying an optimal EPS content of 38.79 % by volume for superior energy absorption and load distribution. The novel SE-S-F layered configuration (EPS-sand mixture over pure sand) reduced RC slab tension damage by 79.7 % compared to traditional sand cushions and crack width by 92.3 % relative to the EPS-sand mixture, surpassing monolithic designs. It minimized transmitted forces, accelerations, and energy dissipation while promoting flexural cracking for enhanced structural protection. Validated numerical simulations accurately modeled impact dynamics, enabling reliable performance predictions. Successive impact tests confirmed the SE-S-F configuration's multi-impact resistance, achieving a non-dimensional factor (Ω) of 1.47 by the fifth impact, outperforming geofoam-based designs. Repurposing waste EPS, this approach delivers lightweight, sustainable, and cost-effective rockfall protection systems, enhancing safety in mountainous regions and transportation corridors. • Optimal EPS-sand cushion (38.79 % EPS) via OED & RSM enhances rockfall protection. • SE-S-F layered cushion cuts RC slab damage by 67 % vs. sand, improves energy dissipation. • Validated numerical model optimizes design; waste EPS use aids sustainable rockfall mitigation. [ABSTRACT FROM AUTHOR]
ISSN:02661144
DOI:10.1016/j.geotexmem.2025.06.007