Table 3.

Second mathematical model parameters for the symmetric behavior in the tension/compression direction^∗.

Isolator #	$k$ (N/mm)	$k_1$ (N/mm)	$k_2$ (N/mm)	$x_1$ (mm)	$x_2$ (mm)	$Q$ (mm)	$x_y$ (mm)	$k_p$ (N/mm)
1	146.65	58.12	122.91	-4.61	4.23	228.57	0.2549	0.0138
2	119.83	35.46	59.37	-1.46	4.42	162.81	0.2377	0.0058
3	68.47	73.82	36.15	-7.55	2.92	148.53	0.3565	0.1
4	58.84	12.92	16.13	-1.01	2.91	131.97	0.345	0.005
5	552.49	239.8	746.39	-1.03	5.29	762.19	0.2256	0.0146
6	180.12	187.38	71.04	-7.52	3.99	384.15	0.4058	0.095
7	366	488.49	550.06	-8.14	0.01	941.12	0.5621	0.0362
8	317.46	391.25	87.6	-7.54	4.88	885.89	0.6378	0.0368
9	218.76	313.08	76.54	-7.88	1.35	629.11	0.4111	0.0214

^∗The Bouc-Wen model parameters are $A=1,\beta =0.1,\gamma =0.9,\eta =2$ for all isolators.