Development of Transversely Isotropic Elastoplastic Constitutive Model in FLAC^3D and Its Application in Tunnel Engineering

Table 2

Calculation parameters of constitutive model [40].

	Parameter	AN-MC model	Transversely isotropic model
Level occurrence	Dip direction angle dd (°)	45	45
	Dip angle dip (°)	45	45
Elastic parameters	The elastic modulus of the plane parallel to the bedding plane (Pa)	1e9	1e9
	The Poisson ratio of the plane parallel to the bedding plane	0.26	0.26
	The elastic modulus in the plane perpendicular to the bedding plane (Pa)	0.5e9	0.5e9
	The plane Poisson ratio in the plane perpendicular to the bedding plane	0.36	0.36
	The shear modulus in the plane perpendicular to the bedding plane (Pa)	0.34e9	0.34e9
Plastic parameters	The cohesion (Pa)	20e9	—
	The friction (°)	40	—
	The tensile strength (Pa)	20e9	—