沉管隧道接头三维非线性刚度力学模型

Three dimension Nonlinear Stiffness Mechanical Model of Immersed Tunnel Joints

摘要:

根据沉管隧道接头的构造特征，在接头静力平衡关系的基础上，建立了沉管隧道接头力学模型.该模型可以计算接头的轴向位移、切向位移以及转角，考虑了沉管隧道接头变形协调几何关系、GINA止水带和OMEGA止水带的应力应变关系，并依据剪力键的相对位移对接头处不同工作模式进行了识别与划分.对不同工作模式下剪力键的受力作用机理进行了分析.利用此计算模型，得到了沉管隧道接头的位移和力的关系曲线，并对沉管隧道接头处不同构件的材料选取给出了建议.

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.