ABSTRACT
We propose a simple three-dimensional (3D) structural-analysis model for steel segment joints in shield tunnels. Certain types of shield tunnels comprise a primary lining of steel segments and a secondary lining of unreinforced concrete. The 3D finite element method (FEM) is promising as a structural-analysis method that considers the secondary lining. However, there are few examples of 3D FEM analysis applied to such steel segments, and its accuracy has not been thoroughly evaluated. In this paper, as a preliminary step toward establishing an accurate comprehensive analysis method that considers the secondary lining, we propose a structural-analysis model comprising only of steel segments. The aim of this model is to reproduce the behavior of segment joints by adopting a structure in which the joint plates are connected using bolts. We demonstrate that the proposed model accurately reproduces joint bending test results over the range of acting moments that are normally considered.
