抄録
Series of tests were carried out on reinforced concrete knee joints with/ without upper column stub to validate the anchor details of beam rebars and the stub size suggested in AIJ Standard of RC. The column stub was effective on the anchorage strength and the strut mechanism in case of larger than the half of the beam depth as recommended in the Standard, while it was not effective in case of the smaller stub. The 180 degree hooks only at the four corner of the stub top were effective, though the splitting failure could be induced due to the stress concentration.
