Parametric Analysis on Seismic Performance of Hybrid Precast Concrete Beam-Column Joint

Table 1

Details of test specimen and material properties.

Specimens	Connection method (axial force)		Hoop bar of joint area	ECC area (mm)		Column size (mm)		Beam size (mm)	Column
									Reinforcing bar (upper and lower)			Hoop
									(MPa)			(MPa)		(mm)
RC-control	Cast-in-place (0.1)		O	—		350 × 350		350 × 400	508	0.038	12-D22	475	0.011	50	D13
PC-I50-0.2	Inside connection (0.2)		X	500 (1.4 d)
Specimens	Beam							(MPa)			(kN)	(kN)	(kN)
	Reinforcing bar (upper and lower)			Stirrup				PC member	ECC member
	(MPa)			(MPa)		(mm)
RC-control	437	0.012	8-D16	475	0.014	100	D13	27.5	—	1.6	1,056	792	629	1.68	1.53
PC-I50-0.2	461	0.016	8-D19					27.5	40.5	1.6	1,286	965	628	2.04	1.53

, , , and : yield strength of column bar, hoop, beam bar, and beam stirrup, respectively; , ,, and : ratio of column bar, hoop, upper beam bar and lower beam bar, and stirrup, respectively; , , , and : size of column bar, hoop, beam bar, and stirrup, respectively; : compressive strength of concrete and ECC; and : type 1 and type 2 shear strength of joint predicted by ACI 318-05; : joint shear strength when beam bar yields.