Time-Frequency Characteristics of Ground Motion and Seismic Response Analysis of Typical Structures in the Yangbi Earthquake in Yunnan Province

Table 3

Cumulative participation mass of the first 110 vibration modes of the bridge structures.

Mode	Vibration mode participation mass/X (%)	Vibration mode participation mass/Y (%)	Vibration mode participation mass/Z (%)
1	0	70.47	0
2	0	70.47	25.89
3	75.74	70.47	25.89
4	76.62	70.47	25.89
5	76.62	70.47	73.97
6	76.62	70.47	73.97
7	77.83	70.47	73.97
8	77.83	70.47	73.97
9	77.83	70.47	74.05
10	77.83	70.47	74.05
…	…	…	…
67	90.17	92.87	77.69
…	…	…	…
105	90.17	92.87	94.35