Shock and Vibration / 2017 / Article / Tab 4

Research Article

Effects of Precast Cladding Systems on Dynamic Characteristics of Steel Frame Buildings by Ambient and Free Vibration Tests

Table 4

Natural frequencies and damping ratios estimated from free vibration tests.

CasePeak acc.
(×10−2 m/s2)
FrequencyDamping ratio
ζ (%)
f (Hz) (Hz)COV (%)

196.23.410.0070.210.1~0.5
236.13.630.1323.641.5~3.2
332.53.770.1283.401.3~3.1
433.53.810.1463.830.8~3.4
532.14.160.1182.840.8~3.0
644.93.700.1062.860.7~2.8
739.83.950.1002.530.5~2.7
894.03.440.0421.220.5~2.0
994.33.530.0481.360.5~2.2
1021.94.530.1342.960.9~3.5

Note: f denotes mean value of natural frequency;  σ  denotes standard deviation; and COV denotes coefficient of variation.