Enhancement of shear capacity in reinforced concrete beams through different techniques using SHCC
Oral Presentation
Paper ID : 1181-ICASGE
Authors
Assistant lecturer, Faculty of Engineering, Tanta University, Egypt
Abstract
This research intends to investigate the structural behavior of Reinforced Concrete (RC) beams strengthened with Strain Hardening Cementitious Composites (SHCC) jackets through both experimental and numerical methodologies employing the finite element method. SHCC constitutes an advanced engineered cementitious composite that exhibits significantly enhanced properties compared to traditional cement mortar, incorporating constituents that optimally and efficiently increase various performance characteristics such as tensile strength, durability, and crack control. The tested specimens encompassed two experimental beams: one beam strengthened with full SHCC jacketing along its entire length, alongside a control beam. Furthermore, utilizing ABAQUS 6.14, two primary parameters were scrutinized; (a) partial jacketing applied at the midpoint of the shear span, with examined ratios of 33%, 67%, and 100%, (b) vertical strips positioned at uniform intervals of 150 mm, with strip widths of 50 mm, 75 mm, and 100 mm. All methodologies demonstrated efficacy in increasing the shear capacity of the beams; however, the full SHCC jacketing emerged as the most efficacious approach. The beam with full jacketing exhibited failure at a load approximately 47.30% greater than that of the control beam. Furthermore, a nonlinear finite element model (FEM) was created to investigate the adequacy of the experimental results, which aligned closely with those predicted by the proposed model, demonstrating a commendable degree of accuracy. The findings indicate that the implementation of partial jacketing or vertical strips markedly increased the maximum load capacity and energy absorption of the reinforced RC beams when compared to the control beam that failed in shear.
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