RELIABILITY ANALYSIS OF TUNNEL SECONDARY LININGS DURING SERVICE LIFE
For some tunnels,secondary linings are used to carry loads. In this paper,a method is presented to assess the reliability of composite linings during the service life of tunnels. A pulse process is proposed to describe the degradation of reinforced concrete linings. Based on construction records,in-situ monitoring data and finite element analyses,Response Surface Method is adopted to obtain the explicit expressions of load effects. A strict formulation for reliability analysis is given. Finally,the proposed method is demonstrated with an example.