Loading tests were conducted using column-beam joint specimens with such a shear-bending capacity ratio in the panel zone as specified for practical design. 1) The Q-R curve indicated stable and ductile hysteresis with no rapid strength reduction beyond the maximum strength. 2) No difference was found in Q-R curve envelope between PCa and RC specimens. 3) The maximum strength at the column-beam joint where flexural yielding of the beam preceded could be accurately evaluated by ACI equation for beams. 4) No difference was found between PCa and RC specimens in the relation between equivalent viscous damping factor and inter-story displacement.
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