In beam-column joints (IS 13920), the transverse reinforcement provided in the joint zone is to resist:
Choose the correct answer
Only vertical column load
Joint shear and to confine core concrete — prevents brittle diagonal shear failure at joint
Only beam bending
Temperature and shrinkage only
Correct Answer
B. Joint shear and to confine core concrete — prevents brittle diagonal shear failure at joint
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IS 13920 beam-column joint: Transverse reinforcement (hoops) in joint zone resist: (1) Diagonal tension from horizontal and vertical shear; (2) Concrete confinement (increases ductility and compression capacity of joint core). Joint shear = column shear − beam bar forces. Joint failure = brittle shear failure → must be avoided by adequate hoops.
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