Effect of loading type on RC T-Beam sections involving construction errors

Abstract

The paper presents the effect of loading type on RC T-beam sections involving construction errors. This study involved 12 RC T-beams specimens divided into two main categories according to loading method. First category was loaded with uniformly distributed load at two-edges of slab while the second, were loaded with two-point concentrated loads at the middle length of beam specimen. The aim of this study is to evaluate, the effect of malposition of slab reinforcement, unequal configuration of slab reinforcement and change in bar diameter of slab reinforcement on the structural behavior of T-beam sections. The results indicated that malposition of slab reinforcement leads to a lower bending moment capacity of the slab. Flexural capacity of T-beams was higher than the rectangular beams where part of slab contributes to the resistance of the loads. Well-arranged distribution of reinforcement improves the ductile behavior of the slab and reduces the corresponding deflections.

Evaluation of the structural performance of T-section beams with construction defects utilizing numerical analysis

“…The results clearly demonstrate that an increase in the diameter of the longitudinal reinforcement substantially enhances the load-bearing capacity of the slab. These results agreed well with the findings from previous work (Ahmed et al, 1989;Pansuk and Sato, 2007;Bayoumi, 2022;Abbas and Fadala, 2021;Chen, 2016;National Education Policy, 2020).…”

“…With increasing loads, multiple cracks developed in the contact region between the slab and the beam, ultimately culminating in the failure of the models. This is line with other studies who investigated the effect of the spacing of slab secondary reinforcement (Huang et al, 2019;Bayoumi, 2022;Abbas and Fadala, 2021;Ayensa et al, 2019). An isometric view of the deflection for model GIM-1.…”

“…The initial cracking load is also affected by the flange width, with a wider flange resulting in a higher cracking load. However, it is important to note that the crack pattern in T-beams with varying flange widths remains generally consistent (Harry, 2016;Bayoumi, 2022;Thamrin et al, 2016;Ciesielczyk et al, 2017). W. Pansuk and Y. Sato (Lafta and Ye, 2015) studied the shear capacity of reinforced concrete T-beams.…”

“…This observation aligns with findings from other studies that reported a similar behavior when the distribution of reinforcing steel within the slab was irregular. In essence, the uneven distribution of reinforcing steel has a direct impact on the structural performance, influencing both the ultimate load and deflection values of the concrete slab models (Rossetto et al, 2017;Huang et al, 2019;Bayoumi, 2022;Jumaat et al, 2010;ASTM, 2024).…”