Seismic Performance of Steel Box Bridge Piers with Earthquake-Resilient Function

Table 3

Results about loading bearing and deformation of pseudostatic specimens.

Specimen label		Nominal yield point			Peak point			Extreme point			Ductility μ = δu/δy
		δy (mm)	(kN)	θy = δy/L	δmax (mm)	(kN)	θmax = δmax/L	δu (mm)	θu = δu/L
I-1	Plus	9.5	295.04	1/198	30.99	345.72	1/61	48.40	−1/39	0.85	5.09
	Minus	−9.5	−303.31	−1/198	−29.71	−330.45	−1/63	−43.08	−1/44	0.92	4.53
II-1	Plus	9.5	341.32	1/198	47.58	434.29	1/40	52.99	1/35	0.79	5.58
	Minus	−9.5	−383.17	−1/198	−48.64	−434.99	−1/39	−60.19	−1/31	0.88	6.34
II-2	Plus	10.1	359.83	1/186	53.84	405.65	1/35	63.48	1/30	0.89	6.29
	Minus	−10.1	−348.60	−1/186	−47.98	−403.00	−1/39	−58.53	−1/32	0.87	5.80
II-3	Plus	10.8	345.71	1/174	43.91	420.86	1/43	57.25	1/33	0.82	5.30
	Minus	−10.8	−369.48	−1/174	−43.81	−431.15	−1/43	−54.07	−1/35	0.86	5.01
III-1	Plus	9.5	292.23	1/198	37.83	353.08	1/50	58.49	1/32	0.83	6.16
	Minus	−9.5	−360.42	−1/198	−41.56	−432.07	−1/45	−59.21	−1/32	0.83	6.23
III-2	Plus	10.1	336.36	1/186	43.18	390.55	1/44	53.39	1/35	0.86	5.29
	Minus	−10.1	−387.94	−1/186	−44.23	−451.40	−1/43	−51.27	−1/37	0.86	5.08
III-3	Plus	10.8	342.53	1/174	46.35	416.04	1/41	56.78	1/33	0.82	5.26
	Minus	−10.8	−377.54	−1/174	−52.48	−456.65	−1/36	−63.98	−1/29	0.83	5.92