Muthanna Journal of Engineering and Technology
Volume (13), Issue (2), Year (30 June 2025), Pages (23-44)
DOI:10.52113/3/eng/mjet/2025-13-02-/23-44
Research Article By:
Nameer M. Jawad Al-Quraishy , Yousif J. lafta , Thaer M. Saeed Alrudaini
Corresponding author E-mail:engpg.nameer.jawad@uobasrah.edu.iq
ABSTRACT
Openings in slabs are an important issue that needs to be studied carefully because these openings have an important effect on load capacity and the general behavior of RC, reinforced concrete slabs. This research aimed to review the previous studies that highlighted the impact of presence of opening in RC one-way and two-way slabs in addition to a review of four important codes, ACI Code, British Standard, Canadian Standard, and European Standard, that focused on this topic. The review of previous studies is divided into two sections, the first is the effect of opening in one-way slabs and the second is the effect of opening in two-way slabs. These studies produced that the opening size and position significantly affect load capacity, flexural, shear resistance, and deflection of slabs. The opening in the slab reduces the load capacity and shear resistance by reducing the concrete mass of the section where the concrete is cut. The flexibility of that slab is reduced in the existence of the opening caused by reinforcement cutting. The effect of opening can be reduced by using additional reinforcements or by using CFRP, carbon fiber reinforced polymer-strengthening.
Keywords:
Review; RC; Opening; slabs.