Study on the Impact of Hydraulic Fracturing on Surrounding Ancillary Buildings considering SSI

Table 3

The first six order modal periods of the structure with different soil properties.

Mode	Considering SSI effect (hard soil) (s)	Considering SSI effect (soft soil) (s)	Regardless of the SSI effect (s)
1	1.643	1.704	1.302
2	1.524	1.649	1.101
3	1.355	1.564	0.713
4	1.311	1.422	0.609
5	1.265	1.349	0.611
6	1.182	1.286	0.588