Torsional Strengthening of RC Beams with Near-Surface Mounted Steel Bars

Table 4

Specimens’ twist ratio.

Beam code	Strengthening type	ϑ u	Δϑ	Mean of Δϑ
Control	Unstrengthened	4.77	1.00	1.00
NSM100	NSM welded steel bar	3.97	0.83	0.77
NSM150		3.64	0.76
NSM200		3.47	0.73
DNSM100		4.35	0.91
DNSM150		3.82	0.80
DNSM200		2.73	0.57