Shear behavior of geopolymer thin panel reinforced by perforated waste glass fiber reinforced polymer sheet

Wind turbine blade production and disposal produce large glass fiber reinforced polymer (GFRP) waste, while reuse research remains scarce. In this study, perforated waste GFRP sheets from blade production were used as the reinforcement, and fiber‐reinforced geopolymer mortar with recycled waste glass aggregate (RWGA) was used as the matrix to fabricate one‐way thin panels. Four‐point loading tests were conducted on seven panel specimens, with investigated parameters including GFRP sheet perforation ratio, hole spacing, reinforcement ratio, and matrix type. Current codes of practice were used for accessing the shear resistance. Furthermore, 3D finite element (FE) model was developed to reproduce the test. The results showed all specimens failed in shear; reducing the GFRP perforation ratio from 19% to 5% lowered shear resistance by 25.04%, while increasing hole diameter from 30 mm to 60 mm reduced shear resistance by 36.43%; existing codes underestimate panel shear resistance, as the predicted‐to‐measured ratio was 0.88 for both ACI 440.1R‐15 and GB 50608‐2020; the developed FE model well reproduces the shear behavior of the specimens and could be used for further study.