A Study on Axial Compression Performance of Large Diameter-Thickness Ratio Concrete-Filled Gas Drainage Steel Pipe

Table 4

Parameters used in the numerical model.

Concrete	Values	Rigid body/steel pipe	Values
Mass density	2400 kg/m^3	Mass density of rigid body	7850 kg/m^3
Unconfined compression strength	30 MPa	Young’s modulus of rigid body	201 MPa
Young’s modulus	27 MPa	Poisson’s ratio of rigid body	0.3
Poisson’s ratio	0.29	Mass density of steel pipe	7800 kg/m^3
Shear strain at failure	0.45	Young’s modulus of steel pipe	206 GPa
Tensile strain at failure	–0.2	Poisson’s ratio of steel pipe	0.29
Maximum aggregate size	19 mm