Field Measurement of Wind Speeds and Wind-Induced Responses atop the Shanghai World Financial Center under Normal Climate Conditions

Table 2

Natural vibration frequency of SWFC (Hz).

Mode	Finite element method	Measured results
		FFT method	HHT method	RDM method
First-order bending in Y direction	0.146	0.153	0.152	0.153
First-order bending in X direction	0.153	0.154	0.152	0.155
Second-order bending in X direction	0.465	0.467	0.468	—
Second-order bending in Y direction	0.481	0.468	0.469	—