Flexural behavior of one-way voided reinforced concrete slabs under the influence of uniformly distributed static loads

One-way voided reinforced concrete slabs are one of the types of slabs widely used in residential and industrial buildings due to their cost-effectiveness, lightweight, and ease of implementation. This study aims to investigate the behavior of one-way voided reinforced concrete slabs under the influence of uniformly distributed static loads. It included the casting of 6 specimens of slabs with dimensions (40001000180) mm, five of which are voids with proportions of (4.36%, 8.72%, 13%, 17.44%, and 21.8%), in addition to a sixth specimen that is solid without voids representing the reference slab. Through the tests, it was revealed that the first cracking load of voids slabs gradually decreases with an increase in the voids' ratio, with the load value decreasing by a percentage ranging from 3.94% to 13.43% compared to the solid (reference) slab. The deflection values also decreased by a percentage ranging from 1.47% to 6.39% when voids were present. Furthermore, the presence of voids led to a reduction in both the maximum load and the resulting deflection, with the load value decreasing by a percentage ranging from 3.18% to 30.44%, and the deflection value decreasing by a percentage ranging from 1.35% to 23.64% compared to the reference slab. It was also observed that the presence of voids in the slabs resulted in a decrease in the ductility index, with a decrease ranging from 0.8% to 19.9%.