Structural Efficiency of Non-Prismatic Hollow Reinforced Concrete Beams Retrofitted with CFRP Sheets

Non-prismatic reinforced concrete (RC) beams are widely used for various practical purposes, including enhancing architectural aesthetics and increasing the overall thickness in support area above column, which gives high assurance to services that this will not result distortion of construction features can reduce heights. The hollow sections (recess) also be maintenance large structural safe passage utility lines water, gas, telecommunications, electricity, etc. They generally complex civil engineering works like bridges. This study conducted a numerical using commercial finite element software ANSYS version 15 analysing RC beams, longitudinally sectioned retrofitted with carbon fibre polymers (CFRPs), were subjected concentrated vertical loads. analysis results on simulated beam models excellent agreements previous experimental test results. convergence was confirmed by statistical analysis, considered correlation coefficients, individual arithmetic means standard deviations all calculated deflections models. A proposed simulation model hypotheses suitable modelling behaviours simple supported non-prismatic under showed altering cross-section from solid could load carrying capacities up 53% increase corresponding 40%, respectively. Using steel pipes making recesses enhance loading capacity 56%, ductility, 30%, Finally, it found bonding CFRP sheets lower middle tensile areas improve resistance deformations 27%. failure patterns shear failure. cylinder compressive strength as mechanical parameter assessing models, its 30–50%.