Abstract
The objective of this paper is to present a new limit state design method for a concrete tunnel lining reinforced by steel fiber under the condition acting both bending moment and compressive force at the cross section. The basic concept of this method is similar to that for a reinforced concrete. However, the current definition of limit state is not available for such a structure due to the difference of loading condition and material. Three limit states characterized by serviceability, strength considering toughness and the deformation around the failure respectively were difined. Note that these limit state doesn't specify the whole failure of the lining but the failure of the member. The opening width of crack is appropriate to specify each limit state. The value for each limit state is proposed based upon the results obtained by flexural loading test for the specimen.
