Behaviour of RC beams under combined shear and torsion according to AASHTO LRFD and ACI equations

摘要

In this study, the AASHTO LRFD provisions for combined shear and torsion have been investigated and their accuracy has been validated against experimental data. AASHTO LRFD (2008) provisions on combined shear and torsion have also been compared to the pertinent ACI code requirements for the behaviour of reinforced concrete beams subjected to combined shear and torsion. In this comprehensive comparison, different sections with high strength and normal strength concrete as well as over-reinforced, moderately-reinforced and, under-reinforced solid and hollow sections were analysed. This study resulted in findings on the applicability of both code procedures to different sectional material and geometry values under these load combinations.