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An innovative concept for design and detailing of precast concrete frame structures is analyzed under accidental seismic-type loading. The new detailing of post-tensioned assembled structures derives from the special hybrid moment frames as defined in the ACI T1.2-03 standard. The alternative detailing of special reinforcements, named modified special hybrid joints, are bondless with respect to both column and beams. The model represents a corner of an actual multistoried structure, cropped in the middle of the be...