A Comparative Test Study on the Seismic Damage Sustained by Frame-Core Tube Structures

Table 11

Damping and frequency of normative model.

PGA (g)	0.105	0.21	0.3	0.45	0.66	0.76
Primary frequency	3.13	3.13	2.95	2.73	2.34	1.95
Second mode frequency	10.16	9.77	9.77	9.38	8.78	8.39
Damping ratio (%)	5.7	5.7	5.81	6.42	7.35	7.54