Analysis of Seismic Damage of Underground Powerhouse Structure of Hydropower Plants Based on Dynamic Contact Force Method

Table 1

Mechanical parameter of rock mass and concrete.

Material	Deformation modulus (GPa)	Poisson ratio	Cohesion (MPa)	Friction angle (o)	Tensile strength (MPa)
Rock	10	0.25	2.18	41.6	1.97
Concrete (lining and inner structure)	25	0.17	2.0	46	1.30