Mohamed AbdelBaset
Asst. Lecturer
Parametric Study and Finite Element Analysis of Reinforced Concrete Two-Way Slabs with Openings Enhanced by Innovative Methods
Benha Journal of Applied Science (BJAS) • 2025
Publication Information
Authors
Mohamed AbdelBaset , Mohamed H. Makhlouf *, Marwa H. Bondok , Gamal I. Khaleel
Keywords
ABAQUS; FEA; R.C; openings; slabs; strengthened
Journal
Benha Journal of Applied Science (BJAS)
Publisher
Benha University
Volume
10
Issue
12
Pages
1-20
publication.type
Local
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Reinforced concrete (RC) slabs are essential structural elements, but their performance can be weakened
by unplanned openings introduced after casting. This study explores the flexural behavior of RC two-way
slabs with openings, strengthened using innovative techniques through nonlinear finite element modeling in
ABAQUS 6.14. The model was validated with experimental results [1], followed by a parametric study on
54 slab specimens. Key variables included opening shapes, strengthening materials (CFRP, GFRP),
techniques (NSM, EBR, INNER), rod-end shapes, and FRP sheet configurations. Results showed that double
rectangular openings performed best. CFRP sheets increased ultimate load by 36–38% while, INNER
technique improved strength by 2–6% over NSM, and anchored GFRP sheets enhanced load by 31–35%.
Hooked rods raised capacity by 5–10%, and FRP sheets placed at corners of openings added 3–5% more
capacity. These findings highlight the significant influence of opening geometry and reinforcement strategies
on improving the structural performance of RC slabs.
by unplanned openings introduced after casting. This study explores the flexural behavior of RC two-way
slabs with openings, strengthened using innovative techniques through nonlinear finite element modeling in
ABAQUS 6.14. The model was validated with experimental results [1], followed by a parametric study on
54 slab specimens. Key variables included opening shapes, strengthening materials (CFRP, GFRP),
techniques (NSM, EBR, INNER), rod-end shapes, and FRP sheet configurations. Results showed that double
rectangular openings performed best. CFRP sheets increased ultimate load by 36–38% while, INNER
technique improved strength by 2–6% over NSM, and anchored GFRP sheets enhanced load by 31–35%.
Hooked rods raised capacity by 5–10%, and FRP sheets placed at corners of openings added 3–5% more
capacity. These findings highlight the significant influence of opening geometry and reinforcement strategies
on improving the structural performance of RC slabs.