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12 Load Gauged short bars Gauged long bars #10 (#3) spiral Section X-X X X #10 (#3) spiral @ 65 mm (2.5 in.) 16x106 mm (5/8 x 4 3/16 in.) shear studs W610x101 (W24 x 68) girder 20 - #19 (#6) longitudinal bars 13x80 mm (1/2 x 3 1/8 in.) shear studs 20 - 16x68 mm (5/8 x 2 11/16 in.) shear studs 135 mm (5 5/16 in.) vertical spacing 138 mm (5 7/16 in.) horizontal spacing Cap beam Located on vertical cap plate 760x560x13 mm (30 x 22 x 1/2 in.) #10 (#3) spiral @ 90 mm (3.5 in.) 13x80 mm (1/2 x 3 1/8 in.) shear studs Slab reinforcement Deck, 67 mm (2 5/8 in.) thick #10 (#3) bar 13x54 (1/2 x 2 1/8 in.) shear studs @ 100 mm (4 in.) c-to-c both directions (a) SPC1 Load Bars without mechanical anchorage #10 (#3) spiral Section X-X X X #10 (#3) spiral @ 63 mm (2.5 in.) 20 - 16x70 mm (5/8 x 2 11/16 in.) shear studs 135 mm (5 5/16 in.) vertical spacing 20 - #19 (#6) longitudinal bars 100 mm (3 15/16 in.) horizontal spacing 16x106 mm (5/8 x 4 3/16 in.) shear studs Located on vertical cap plate W460x60 (W18x40) girder #10 (#3) spiral @ 90 mm (3.5 in.) 13x80 mm (1/2 x 3 1/8 in.) shear studs Cap beam Cap beam P L 760x410x10 mm (30 x 16 1/8 x 3/8 in.) 10 mm (3/8 in.) washer P L 16 mm (5/8 in.) nut 13x80 mm (1/2 x 3 1/8 in.) shear studs Slab reinforcement 70 mm (2 5/8 in.) deck Longitudinal bar #10 (#3) bar 13x54 mm (1/2 x 2 1/8 in.) shear studs threaded end @ 100 mm (4 in.) c-to-c both directions (b) SPC2 Figure 5. Column-to-cap beam connection detail. spring was used to model the plastic hinge region of the col- umn. In SPC2, two load cells were added to measure interior umn. The spring's properties reflected the moment-rotation girder support reactions. behavior developed from the moment-curvature analysis con- Displacement and rotation transducers were used on SPC1 ducted for the column section. and SPC2 to monitor selected displacements and rotations. These transducers measured horizontal deflection and rota- 2.4.3 Instrumentation tion of the column free end, relative vertical deflections of the column used to determine column curvature, vertical deflec- Load cells were used to measure the horizontal and verti- tions of the specimen girders, relative horizontal girder dis- cal column loads applied at the free end of the specimen col- placements used to determine girder curvature, girder elon-