INTRINSIC MECHANISMS IN REINFORCED-CONCRETE BEAM-COLUMN CONNECTION BEHAVIOR

Laboratory tests on 17 reinforced concrete external beam-column connec tions are described-15 subjected to monotonic lending and two to simul ated seismic loading. Parameters investigated were beam depth, beam te nsion steel percentage, reinforcement details for beam tension steel. and column load. Detailed measurements of strain distributions along b oth the beam and column bars were made using internally strain-gaged r einforcement, and results are presented to indicate influences exerted by the rest parameters on reinforcement strain distributions. Bond st resses along the beam tension steel were evaluated and the means by wh ich the reinforcement details effected load transfer by bond determine d. Recommendations are made concerning the effectiveness and suitabili ty of these details in practical connection design.