Resistance of Punching Shear Strength of RC Flat Slabs According to Laboratory and Finite Element Analysis Study Comparison of International Codes

F. H. Habeb, Hanna; A. Mahmoud, Ahmed; G. Sherif, Alaa; M.M. Genidi, Magdy

doi:10.21608/erj.2022.242794

Resistance of Punching Shear Strength of RC Flat Slabs According to Laboratory and Finite Element Analysis Study Comparison of International Codes

Document Type : Original Article

Authors

¹ Higher Institute of Engineering, 15th of May City, Egypt (E-mail: civil.hanafakhry@yahoo.com).

² Corresponding author, Tel: 20201005679172, E-mail: ahmed.ahmed@feng.bu.edu.eg, ahmed.m5882@gmail.com Department of Civil Engineering, Faculty of Engineering at Shoubra, Benha University - , 108 Shoubra Street, Shoubra 11691, Cairo, Egypt Corresponding author, Tel: 20201005679172, E-mail: ahmed.ahmed@feng.bu.edu.eg, ahmed.m5882@gmail.com Department of Civil Engineering, Faculty of Engineering at Shoubra, Benha University - , 108 Shoubra Street, Shoubra 11691, Cairo, Egypt

³ Professor of Reinforced Concrete Structures, Civil Engineering Dept., (Structure), Faculty of Engineering El Matarya- Helwan University, Cairo, Egypt

⁴ Associate Professor, Civil Engineering Dept., (Structure), Faculty of Engineering El MataryaHelwan University, Cairo, Egypt

10.21608/erj.2022.242794

Abstract

The main objective of this paper is to study the effect of the proposed external strengthening techniques to resist punching shear of reinforced concrete flat slabs using nonlinear finite element. The finite element (FE) analysis software program (ANSYS V. 19) was used to create the models and investigate the effects of some parameters on punching shear of reinforced concrete flat slabs. Ten variable parameters are taken into consideration during study full scale flat slab models to account the influence of: (1) concrete compressive strength fcu; (2) reinforcing steel yield strength fy; (3) slab thickness (ts); (4) shear studs and stirrups diameter (Db); (5) shear studs (stirrups) spacing /ts ratio (Sb/ts); (6) shear studs stirrups spacing/ts ratio (D/ ts); (7) main steel ratio/ max (  / max); (8) top steel ratio/ max (` / max); (9) drop thickness/ts ratio (td/ ts) and (10) drop diameter/ts ratio (Dd/ ts).The numerical results were compared with the analytical results calculated from ECP 203-2017 [1] and ACI 318-19 [2]. The comparison showed a great match between the numerical results and the results of the two codes, especially ACI 318- 19 [2].

Keywords