Three dimension Nonlinear Stiffness Mechanical Model of Immersed Tunnel Joints

Abstract:

According to the structural characteristics and static equilibrium of the joints, immersed tube tunnel three dimension nonlinear stiffness mechanical model was established, with which the joints’ displacement in all degrees of freedom could be calculated. Furthermore, the harmonious relation for deformation and stress strain relations of GINA and OMEGA gasket were considered. The different operating modes of the joints were divided and identified by the relative displacement of the shear key. With this model, the joints’ mechanical characteristic was analyzed and the nonlinear relation between the joint displacement and the joint’s internal force was also obtained.