Abstract
Authors performed model tests and numerical analyses to clarify a limit state of mountain tunnel linings which consist of various materials focused on deformation and failure behavior. It was found that plain concrete lining does not show decreasing of load until it receives large deformation, whereas cracks occur and structural stiffness decreases, and it was found that plain concrete lining has good deformability. It was found that brick lining has smaller structural stiffness and bearing capacity than those of plain concrete lining, and cracks occur between the two beds of bricks after it receives large deformation. It was found that structural stiffness and bearing capacity of short-fiber-reinforced concrete lining are almost same as those of plain concrete lining; however the short-fiber-reinforced concrete lining has good untispalling ability at the part where compressive bending failure occurs. It was found that structural stiffness and bearing capacity of reinforced concrete lining are larger than those of plain concrete lining, and reinforced concrete lining are able to support load after yielding of its rebar, on the other hand, it was also found that shear failure becomes easy to occur by improving ending capacity.
