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- Title
Redistribution of Internal Forces in Reinforced Concrete Beams Subjected to Combined Load.
- Authors
Jung-Yoon Lee; Na-Yeong Kim; DongIk Shin; Kil-Hee Kim; Haroon, Muhammad
- Abstract
In an actual structure, torsion seldom acts alone; rather, a complex load combination acts together. Members subjected to a complex loading condition--that is, shear, bending, torsion, and so on-show lower strength compared to the members under torsion only. However, when structural members exhibit ductile behavior, the force-deformation correlation of shear force, bending, and torsional moment may change due to the redistribution of internal forces. In this study, the interaction of bending and torsional moments was evaluated by analyzing the test results of 123 reinforced concrete (RC) members subjected to combined loading. Additionally, 13 RC beams subjected to combined actions of bending and torsional moments were tested to investigate the effect of force redistribution. The results indicate that the post-yielding behavior of actual members subjected to combined loading significantly differs from the theoretically predicted one. This is because the theoretically induced bending and torsional moment interaction curves are based on strengths corresponding to the yield point of reinforcement. However, the experimental results show that the force redistribution mechanism develops after the first reinforcement yielding. Consequently, the torsional strength does not decrease as sharply as theoretically assumed, even when the bending moment increases.
- Subjects
BENDING moment; TORSIONAL load; FORCE &; energy; SHEARING force; YIELD strength (Engineering); REINFORCED concrete
- Publication
ACI Structural Journal, 2023, Vol 120, Issue 6, p151
- ISSN
0889-3241
- Publication type
Article
- DOI
10.14359/51739093