Experimental Study on Biaxial Flexural Behaviors of Textile Reinforced Concrete Slab With Hybrid Fibers

To study the biaxial flexural behaviors of textile reinforced concrete (TRC) slab, a monotonic static load test was carried out on 12 TRC square slabs with four-sided simple support. The effect of textile layers and types, PVA fiber content, and hybrid fiber on the biaxial flexural behaviors of TRC slab were studied. Results show that the increase of textile layers can effectively increase the load-bearing capacity and energy dissipation capacity of TRC slab, and improve its bending deformation ability. Compared with BFN, the effect of GFN is better. Compared with the BTRC slab with 0.5% PVA, when the PVA fiber content reaches 1.5%, its full distribution process of internal force can effectively improve, thus increasing its ultimate bearing capacity, and the post cracking stiffness is increased by 20.8% and 25.5%, respectively. Moreover, the energy absorption value is 1.37 times that when the fiber content is 0.5%; a hybrid of 1.0% steel fiber and 0.5% PVA fiber shows a positive hybrid effect in improving the bearing capacity of BTRC slab. Compared with BTRC slabs adding single short fibers, the ultimate load is increased by 9% and 12%, respectively. Whether it is BFN or GFN, as the distribution network rate increases, its fiber effective utilization rate shows a decreasing trend.