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

Table 12

Damping and frequency of optimization model.

PGA (g)	0.105	0.21	0.3	0.45	0.66	0.76
Primary frequency	3.03	3.03	2.73	2.54	2.34	2.04
Second mode frequency	9.77	9.38	8.98	8.78	8.39	8.14
Damping ratio (%)	5.51	5.51	5.82	6.65	7.6	7.75