Research on Cumulative Damage Characteristics of Rock Anchor Beam Concrete Supporting Structure by Blasting Vibration of Underground Powerhouse

Table 2

Parameters of the RHT concrete model.

Parameter	Value	Parameter	Value
Material density ρ0	1780 kg/m^3	Failure surface parameters A	1.6
Initial porosity α0	1.1613	Failure surface index n	0.55
Pressure at the beginning of pore crushing pel	18.5 MPa	Tension compression meridian ratio parameter QO	0.68
Pressure at pore is fully compacted pcomp	0.556 GPa	Rhode angle correlation coefficient B	0.08
Porosity index N	2.0	Shrinkage strain rate index c	0.032
Hugoniot coefficient A1	39.75 GPa	Tensile strain rate index t	0.036
State equation parameters B1	1.306	Residual stress intensity Af	2.42
Shear modulus G	12.0 GPa	Initial damage parameters D1	0.052