A Solution of Subgrade Modulus for Response Displacement Method of Circular Underground Structures

Table 3

Parameters of the joints in the beam-spring model.

Stiffness of the joints		Value
Segment joints	Axial stiffness kA/kN/m	1.04 × 10^8
	Radial stiffness kR/kN/m	4.31 × 10^7
Ring joints	Radial shear stiffness kSR/kN/m	1.00 × 10^5
	Tangential shear stiffness kST/kN/m	1.00 × 10^5