Abstract Timely identification of tunnel damage and rehabilitation will ensure safe tunnel operation since tunnel is an important part of traffic engineering. Based on a two-dimensional tunnel model, taking the pressure generated by high-speed train passing through tunnel as the applied load, the time-history curve of inner lining node is obtained by FEM, the curvature curve corresponding to this time-history curve is factorized by using wavelet packet transform, and the position of damage is identified by taking the standard error of displacement curvature energy as a damage index. The research results show that this method can effectively identify the position of tunnel damage.
Abstract：
Timely identification of tunnel damage and rehabilitation will ensure safe tunnel operation since tunnel is an important part of traffic engineering. Based on a two-dimensional tunnel model, taking the pressure generated by high-speed train passing through tunnel as the applied load, the time-history curve of inner lining node is obtained by FEM, the curvature curve corresponding to this time-history curve is factorized by using wavelet packet transform, and the position of damage is identified by taking the standard error of displacement curvature energy as a damage index. The research results show that this method can effectively identify the position of tunnel damage.
2020, Vol. 57 