Optimization of Hollow Core Slab Strength Based on SFRC Orientation

The construction industry has been broadly developed and improved over the last decades.One of the functional innovations in this sector is the employment of steel fibers.This work assesses the impacts of using Steel Fiber Reinforced Concrete (SFRC) on the properties of hollow-core slabs.The hollow core slab (HCS) is considered in this research.Also, this study explored the influence of utilizing some SFRC fractions on the characteristics of hollow-core slabs.Four case studies were addressed, including (A) Conventional concrete, (B) Concrete with Type 1 SFRC, (C) Concrete with Type 2 of SFRC with a ratio of 0.5%, and (D) Concrete with Type 2 with a portion of 1%.ANSYS software package was used to guide numerical analysis and modeling of HCS and identify major parameters that affect the HCS performance with the help of Finite Element Analysis (FEA).Depending on the numerical results, it was found that using SFRC between 0.5% and 1% in concrete tubes tested numerically provided significant rates of durability, minimized deflection, and enhanced the mechanical behavior of concrete.Furthermore, the work outcomes confirmed that optimum displacement was attained when the SFRC ratio was 1.5%, corresponding to load values of 25 kN to 200 kN.Besides, the findings affirmed that using the first type of SFRC accomplished a considerable decline in the deflection of concrete.Deflection reduction ratios of 4.16% and 6.23% were obtained after adding the first and second types of SFRC into the reinforced hollow concrete core, respectively.Meanwhile, adding the first and second types of SFRP into non-reinforced hollow concrete core accomplished a reduction portion of 12.2% and 20.39%, respectively.