Structure Strengthening Method for Enhancing Seismic Behavior of Soft Tunnel Portal Section

Table 2

Similarity ratio of major parameters.

Parameter	Similarity ratio
Frequency	0.18
Stain	1
Young’s modulus	1
Internal friction angle	1
Angular displacement	1
Density	1.5
Mass	40500
Time	5.477
Velocity	5.477
Linear displacement	30
Stress	45
Stiffness	1350
Damping	7394
Moment	121500