Study on seismic and thermal performance of prefabricated composite wall based on fiber-reinforced EPS concrete

Abstract

To integrate insulation and load-bearing functions in prefabricated composite wall structures, a novel design based on fiber-reinforced expanded polystyrene (EPS) concrete is proposed. The research focuses on three key aspects: material properties, seismic performance, and thermal performance. Firstly, the compressive strength and thermal conductivity of fiber-reinforced EPS concrete were analyzed at different sand ratios, leading to the development of an optimal mix design and a damage constitutive model. Secondly, a combination of experimental and numerical analysis methods was used to investigate the seismic performance of prefabricated composite walls with different infill materials, including autoclaved aerated fly ash and fiber-reinforced EPS concrete. Finally, thermal performance studies were conducted on prefabricated composite wall panels with different infill materials. The results indicate that the specimens underwent elastic, elastoplastic, and failure stages during loading. While specimens using EPS concrete exhibited a slightly lower overall bearing capacity, they demonstrated superior ductility, energy dissipation capacity, and enhanced insulation and thermal stability.

Keywords

expanded polystyrene (EPS) concrete / sand ratio / prefabricated composite wall / low-cycle reversed loading test / seismic performance / thermal performance

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Funding

The National Natural Science Foundation of China(52168022)