Response Modification Factor of RC Frames Strengthened with RC Haunches

Table 3

Seismic performance of haunch retrofitted RC frame in various seismic zones.

Zone	Ca	CV	Cs, demand (R = 7.50)	Cs, capacity	FoS	Remarks
1	0.08	0.08	0.03	0.20	7.88	OK
2A	0.15	0.15	0.05		4.20	OK
2B	0.2	0.2	0.06		3.15	OK
3	0.3	0.3	0.10		2.10	OK
4	0.4	0.4	0.13		1.58	OK