Cyclic Behavior of Steel Beam to CFT Column Connections with Gusset Plates

Table 6

Percentage change of characteristic quantities of initial stiffness and plastic moment resistance with different weld lengths between the gusset plate and beam flange.

Specimens	Sj.ini/(kN·m·rad^−1)	Percentage (%)	Mu (kN·m)	Percentage (%)	Mp (kN·m)	θp (rad)
SJ5-W1	43984	30.4	123.5	16.7	106.3	2.42 × 10^−3
SJ5-W2	43081	27.7	122.8	16.1	106.4	2.46 × 10^−3
SJ5-W3	42165	25.0	121.7	15.0	106.4	2.53 × 10^−3
SJ5-W4	41171	22.0	120.3	13.7	106.1	2.58 × 10^−3
SJ5-W5	38969	15.5	116.8	10.4	102.5	2.63 × 10^−3
SJ5-W6	36499	8.2	112.1	6.0	94.7	2.60 × 10^−3
SJ5-W7	33741	—	105.8	—	86.0	2.55 × 10^−3

Note. S_j.ini is the initial rotational stiffness; M_u is the moment resistance at 0.05 rad; M_p refers to plastic moment resistance; θ_p rotation corresponds to M_p; percentage means the increasing comparing to SJ-5-W7.