Experimental Seismic Structural Performance Evaluations of RC Columns Strengthened by Stiff-Type Polyurea

International Journal of Concrete Structures and Materials

Table 11 Displacement ductility results of pseudo-dynamic test.

Specimen	Load direction	P_Max (kN)	Displ. (mm)	Yield displ. (mm)	Displ. ductility	Normalized displ. ductility
C-RC	Push	174.51	54.52	47.26	1.15	1.00
C-RC	Pull	− 208.63	− 69.48	− 61.18	1.14	1.00
C-PU	Push	188.79	46.36	34.69	1.34	1.16
C-PU	Pull	− 173.59	− 72.15	− 43.03	1.68	1.48
C-GFPU	Push	180.49	45.51	32.39	1.41	1.22
C-GFPU	Pull	− 188.37	− 69.48	− 44.61	1.56	1.37
R-RC	Push	224.07	38.29	31.93	1.20	1.00
R-RC	Pull	− 224.62	− 67.60	− 40.18	1.68	1.00
R-PU	Push	210.10	36.53	27.58	1.32	1.10
R-PU	Pull	− 218.09	− 63.53	− 40.64	1.56	0.93
R-GFPU	Push	207.29	35.62	28.54	1.25	1.04
R-GFPU	Pull	− 253.13	− 60.56	− 40.74	1.49	0.88