Performance of Retrofitted Self-Compacting Concrete-Filled Steel Tube Beams Using External Steel Plates

Table 8

Modulus of toughness and relative ductility.

Group name	Designation of beams	Modulus of toughness (kN·mm)	Relative ductility index (RDI)
Group A (single bottom plate)	CB-A	7841.9	1.00
	IB-PL-SB	3201.1	0.41
	IB-FL-SB	4120.9	0.53
	RB-PL-SB	2776.5	0.35
	RB-FL-SB	5511.5	0.70
Group B (top and bottom plates)	CB-B	7832.3	1.00
	IB-PL-TB	3824.8	0.49
	IB-FL-TB	4470.1	0.57
	RB-PL-TB	3338.2	0.43
	RB-FL-TB	5864.4	0.75
Group C (double bottom plates)	CB-C	7754.4	1.00
	IB-PL-DB	3980.2	0.51
	IB-FL-DB	3801.3	0.49
	RB-PL-DB	2742.1	0.35
	RB-FL-DB	4884.5	0.63