Analysis of mechanical behavior for slabs with BFRP thermal break

To evaluate the mechanical behavior of slabs with basalt fiber reinforced polymer (BFRP) thermal break, nine specimens were fabricated, including eight with thermal breaks and one reinforced concrete (RC) control specimen. The research parameters include the width of the thermal break, the location of the loading point, and the configuration of shear-resistant components, with comparisons to the RC specimen. The results show that under loading at point A, the load-bearing capacity decreases with increasing thermal break width; when the width exceeds 120 mm, the reduction is generally within 10%. Under loading at point B, the ultimate load-bearing capacity of all specimens with thermal breaks is significantly higher than that of the RC specimen, but it decreases with increasing width, with a maximum reduction exceeding 40%. The addition of shear-resistant components significantly improves the secant stiffness and load-bearing capacity, but also leads to more pronounced brittle failure. A comprehensive comparison indicates that the ductility coefficient of specimens with BFRP thermal breaks is approximately 1.4, and the safety factors for both ultimate load-bearing capacity and deformation capacity of the hybrid reinforced structures are higher than those of the RC structure.