ACI 318-11 ACI 352-02 CCT ACI 318-11 2.2 d b 70 MPa ACI 318-11 ACI 318-11 joints ACI 318-08 -11 ACI, 2008, 2011 ACI 352-02 ACI, 2002 1 62
2(a) 2(b) (2) (3) (4) RC (5) RC (6) RC RC 1 (a) (b) 2 (1) T 3 (1) 3(a) (b) carbon equivalent, CE SD490 3(a) S45C 3(b) (2) 3(c) (3) 3(d) 63
l dt, 318 = 0.192 f y f c d b (1) (a) (b) (c) (d) 3 SD685 490 MPa 2011 ACI 318 2011 ACI 352-02 ACI, 2002 AIJ, 2010 ACI 318-11 ACI 318 2008 ACI, 2008 12.6 ACI 318 2011 ACI, 2011 2008 ACI 318-11 l dt, 318 l dt, 318 8 d b 150 mm f y f c MPa d b (1) 420 MPa (2) #11 (3) (4) 4 5 (5) 2 d b (6) 4 d b (7) l dt, 318 42 MPa 4 d b ACI 318-11 l dh, 318 l d, 318 l dt, 318 = 0.24 l d, 318 = 0.9 (2) (3) c b c b + K tr 1.5 d b 2.5 d b c b + K tr 1.5 d b 0.8 0.32 ACI 318-11 ACI 352-02 f y f c f y f c d b 1 c b K tr d b ACI 352-02 l dt, 352 d b 64
l dh, 352 0.75 l dh, 352 (4) 1.25 1.0 l dt, 352U l dt, 352S (5) (6) (1) 420 MPa (2) 100 MPa (3) (4) ASTM A970 1997 9 10 ACI 318-11 AIJ 2010 AIJ, 2010 17 (7) b 1.0 1.25 S S 1.25 S 1.0 S 0.7 S 0.5 t f b = 0.8 F c / 40 + 0.9 = F c / 40 + 0.9 F c MPa S 1.25 1.0 b 1.0 l d, AIJS l d, AIJU (8) (9) l dh, AIJS l dt, AIJS l dh, AIJU l dt, AIJU (10) (11) 60 MPa SD490 0.56 0.5 ACI 318-11 ACI 318-11 1 2 420MPa 1 2 ACI 318-11 1 ACI 318-11 ACI 352-02 2 ACI 318-11 ACI 318-11 ACI 352-02 ACI 352-02 65
ACI 318-11 42 MPa f y = 420 MPa 1 f c = 28 MPa f c = 35 MPa f c = 42 MPa f c = 49 MPa f c = 56 MPa l dt, 318/d b 15.2 13.6 12.4 11.5 10.8 l dt, 352U/d b 9.6 8.6 7.8 7.3 6.8 l dt, AIJU/d b 13.1 11.8 10.8 9.9 9.1 (12) A s A s f y V col 1.25 1.25 2011 ACI 318-11 V n (13) 2 f f y = 420 MPa c = 28 f c = 35 f c = 42 f c = 49 f c = 56 MPa MPa MPa MPa MPa l dt, 318/d b 15.2 13.6 12.4 11.5 10.8 l dt, 352S/d b 12.0 10.7 9.8 9.1 8.5 l dt, AIJS/d b 18.4 16.6 15.1 13.8 12.8 (1) 20 (2) 15 (3) 12 b j h c mm2 b j mm h c mm f c MPa 2011a V n V jh, u (14) R m 1.2 (15) M nc M nb ACI 318-11 4 d b 42 MPa 4 A b 66
CCT ACI 318-11 CCT 2011 ACI 318-11 3 4 1.5 d b 4.0 d b 101% D10@100mm 1.5 d b 4.0 d b 106% 83% 5 6 1.5 d b 4.0 d b 100% 85% D10@100mm 1.5 d b 4.0 d b 91% 88% 6 1.5 d b 4.0 d b ACI 318-11 4.0 d b 1.5 d b 2.0 d b 3 CCT Specimen a b c d E No. of Spacing Bar Ap/Ab (mm) bars of bars f c Confine (mm) CT01C6D32N1H3T31 500 400 400 1100 160 #10 3 1 0 42 #3@100 CT02C6D32N1H5T31 500 400 400 1100 160 #10 5 1 0 42 #3@100 CT08C6D32N1B9 700 600 600 1620 160 #10 B-90o 1 0 42 0 CT09C6D32N1B18 500 400 400 1100 160 #10 B-180o 1 0 42 0 CT11C6D32N2H5S40T31 500 400 400 1100 320 #10 5 2 4db 42 #3@100 CT11C6D32N2H5S40 500 400 400 1100 320 #10 5 2 4db 42 0 CT12C6D32N3H5S40T31 500 400 400 1100 480 #10 5 3 4db 42 #3@100 CT12C6D32N3H5S40 500 400 400 1100 480 #10 5 3 4db 42 0 CT13C6D36N2H5S40T31 500 400 400 1100 360 #11 5 2 4db 42 #3@100 CT13C6D36N2H5S40 500 400 400 1100 360 #11 5 2 4db 42 0 CT14C6D36N3H5S40T31 500 400 400 1100 540 #11 5 3 4db 42 #3@100 CT14C6D36N3H5S40 500 400 400 1100 540 #11 5 3 4db 42 0 CT15C6D32N2H5S15T31 500 400 400 1100 320 #10 5 2 1.5db 42 #3@100 CT15C6D32N2H5S15 500 400 400 1100 320 #10 5 2 1.5db 42 0 CT16C6D32N3H5S15T31 500 400 400 1100 480 #10 5 3 1.5db 42 #3@100 CT16C6D32N3H5S15 500 400 400 1100 480 #10 5 3 1.5db 42 0 CT17C6D36N2H5S15T31 500 400 400 1100 360 #11 5 2 1.5db 42 #3@100 CT17C6D36N2H5S15 500 400 400 1100 360 #11 5 2 1.5db 42 0 CT18C6D36N3H5S15T31 500 400 400 1100 540 #11 5 3 1.5db 42 #3@100 CT18C6D36N3H5S15 500 400 400 1100 540 #11 5 3 1.5db 42 0 CT19C8D32N1H5T31 500 400 400 1100 160 #10 5 1 0 56 #3@100 CT19C8D32N1H5 500 400 400 1100 160 #10 5 1 0 56 0 CT20C10D32N1H5T31 500 400 400 1100 160 #10 5 1 0 70 #3@100 CT20C10D32N1H5 500 400 400 1100 160 #10 5 1 0 70 0 CT21C6D32N1H5T32 500 400 400 1100 160 #10 5 1 0 42 #3@200 CT21C6D32N1H5T41 500 400 400 1100 160 #10 5 1 0 42 #4@100 CT22C8D32N1H5T32 500 400 400 1100 160 #10 5 1 0 56 #3@200 CT22C8D32N1H5T41 500 400 400 1100 160 #10 5 1 0 56 #4@100 CT23C10D3N12H5T32 500 400 400 1100 160 #10 5 1 0 70 #3@200 CT23C10D32N1H5T41 500 400 400 1100 160 #10 5 1 0 70 #4@100 CT24C6D32N1H3 500 400 400 1100 160 #10 3 1 0 42 0 CT24C6D32N1H5 500 400 400 1100 160 #10 5 1 0 42 0 CT25C6D32N1H7T31 500 400 400 1100 160 #10 7 1 0 42 #3@100 CT25C6D32N1H7 500 400 400 1100 160 #10 7 1 0 42 0 CT26C6D32N1H1T31 500 400 400 1100 160 #10 1 1 0 42 #3@100 CT26C6D32N1H1 500 400 400 1100 160 #10 1 1 0 42 0 CT CCT C ksi D mm N H T B S d b T #, mm 67
4 CCT 6 4.0 d b 1.5 d b 5 4.0 d b 1.5 d b 56 MPa 70 MPa 42 MPa 113% 85% D10@200mm 56MPa 70 MPa 42 MPa 117% 115% D10@100mm 56 MPa 70 MPa 42MPa 110% 117% D13@100mm 56MPa 70MPa 42MPa 120% 108% 7 ACI 318-11 70 MPa 7 3 5 7 90 1 6 18% 3 D10@100mm 3 5 7 68
13 26 45% 8 3 90 5 ACI 318-11 4 CCT Lin, 2013 4 9 ACI 318-11 4 d b 8 4 d b 2.2 d b 4 Spec T1 T2 T3 T4 T5 T6 TX1 TX2 TX3 Config Num Beam Bar d b (mm) (%) Connection Type Spacing of Rebar (d b ) f c ' Materials Development Member Length Strength Design Actual Design f y f ca ' f ya M nc / V jh,u / M nb V n I 5 25 1.2 4.0 43.2 469 1.47 0.87 Bot. II 528 20.8 I 5 25 1.2 4.0 42.3 469 1.47 0.87 Bot. III 309 12.2 I 6 25 1.5 2.2 40.5 469 1.24 1.08 Bot. II 528 20.8 I 6 25 1.5 2.2 46.3 469 1.26 1.01 Bot. III 309 12.2 8 2.0 I 25 2.2 41.2 412 43.2 469 1.23 1.04 Bot. 4 1.0 I 8 2.0 III 309 12.2 25 2.2 42.0 469 1.22 1.06 Bot. 4 1.0 III 309 12.2 I 4 25 1.0 2.2 44.8 489 1.83 0.51 Bot. II 528 20.8 I 4 25 1.0 2.2 44.4 489 1.83 0.64 Bot. III 309 12.2 I 4 25 1.0 2.2 43.4 489 1.83 0.64 Bot. II 325 12.8 l dt (mm) l dt / d b 69
9 10 11 TX1 TX2 TX2 TX3 TX1 TX3 TX2 10 11 2.2 d b 1.0% 0.58 TX1 TX2 TX3 4% 0.58 12 T1 T2 4.0 d b 1.2% 0.87 T1 T2 0.87 10 TX1 TX2 11 TX2 TX3 70
12 T1 T2 13 T3 T4 13 T3 T4 2.2 d b 1.5% 1.05 T3 T4 3% 3% 1.05 14 4.0 d b 2.2 d b 4.0 d b 1.2% 0.87 2.2 d b 1.5% 1.08 6% 80% 0.87 1.08 15 16 T1 T3 T2 T4 T1 T2 4.0 d b T3 T4 2.2 d b 15 16 4.0 d b 2.2 d b 2.2 d b 4.0 d b Lin, 2013 71
16 T2 T4 14 15 T1 T3 5 17 l dt 216 ACI 352-02 309 ACI 318-11 380 450 mm 5 Spec T7 T8 T9 TT1 TT2 TT3 Config Num Beam Bar d b (mm) (%) Connection Type Spacing of Rebar (d b ) f c ' Materials Development Member Length Strength Design Actual Design f y f ca ' f ya M nc / V jh,u / M nb V n l dt (mm) IV 528 20.8 6 25 4.0 2.2 46.8 445 2.64 0.59 Bot. IV 528 20.8 IV 309 12.2 6 25 1.5 2.2 50.0 445 2.66 0.57 Bot. IV 216 8.5 V 528 20.8 6 25 1.5 2.2 49.4 445 2.66 0.58 Bot. V 528 20.8 41.2 412 IV 309 12.2 6 25 1.5 2.2 50.2 465 2.51 0.61 Bot. IV 216 8.5 IV 450 17.7 6 25 1.5 2.2 53.8 465 2.51 0.61 Bot. IV 380 15.0 IV 309 12.2 6 25 1.5 2.2 50.0 465 2.51 0.61 Bot. IV 309 12.2 l dt / d b 72
17 18 M peak 1.25 M n,1.25 l dt 18 216 mm l dt / d b = 8.3 T8 TT1 ACI 318-11 309 mm l dt / d b = 12.2 TT3 1.05 1.15 TT8 TT1 309 mm 216 mm 380 450 528 mm l dt / d b = 15.0 17.7 20.8 1.1 309 mm ACI 318-11 19 T7 T9 T7 l dt = 528 mm T9 l dh = 528 mm 2.2 d b 1.0% 0.58 2013 FC PC 4 6 cm 6 20 4 6 cm 4 6 cm 18 19 T7 T9 73
6 Specimen Field cast Pre-cast FC1 FC2 FC3 PC1 PC2 PC3 b x h (mm) 500 x 600 500 x 600 Top Bar 4-#10 3-#12 3-#12 Beam Bottom Bar 4-#10 3-#12 3-#12 Stirrups #4 @ 150 mm #4 @ 150 mm Cover (mm) 40 40 60 40 60 40 Column b x h (mm) 800 x 800 800 x 800 Main Bar 12-#10 12-#12 12-#12 Connection Type ldt (mm) 458.2 560.6 560.6 560.6 560.6 560.6 d b 14.23 14.23 14.23 14.23 14.23 14.23 Steel Spacing 2.752 3.598 3.081 3.598 3.081 3.598 0.0123 0.0139 0.0144 0.0139 0.0144 0.0139 2.15 2.56 2.68 2.56 2.68 2.56 3.01 0.817 0.921 0.928 0.921 0.928 0.921 0.945 21 4 cm 6 cm ACI 318-11 CCT ACI 318-11 ACI 318-11 2.2 d b 4.0 d b ACI 318-11 74
20 4 cm 6 cm 21 4.0 d b 2.2 d b 1. ACI Committee 318 (2008) Building Code Requirements for Structural Concrete and Commentary, American Concrete Institute. 2. ACI Committee 318 (2011) Building Code Requirements for Structural Concrete and Commentary, American Concrete Institute. 3. ACI-ASCE Committee 352 (2002) Recommendations for Design of Beam-Column Joints in Monolithic Reinforced Concrete Structures, American Concrete Institute. 4. AIJ (2010) AIJ Standard for Structural Calculation of Reinforced Concrete Structures, Architectural Institute of Japan (in Japanese). 5. 2011 6. 2011a 7. 2011 T 8. Ker-Chun Lin (2013), Assessment for Seismic Performance of Headed Bar Anchoring in Beam-to-interior Column Joints, The Thirteenth East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-13), Japan. 9. 2013 75