摘要
隧道作为交通工程的重要组成部分,及时发现隧道损伤并修复是隧道运营安全的重要保障。文章以二维隧道模型为研究对象,采用高速列车通过隧道时所产生的压力为施加荷载,通过有限元模拟得到衬砌内层节点的位移时程曲线,用小波包变换对相应的曲率曲线进行分解,使用位移曲率能量标准偏差作为损伤指标对损伤的位置进行识别。研究分析表明,该方法能够有效地对隧道损伤位置进行识别。
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 ob⁃tained 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.
作者
刘冲
毛毳
LIU Chong;MAO Cui(Department of Civil Engineering,Tianjin Chengjian University,Tianjin 300380)
出处
《现代隧道技术》
EI
CSCD
北大核心
2020年第1期115-119,共5页
Modern Tunnelling Technology
关键词
隧道
损伤识别
小波包变换
曲率能量标准偏差
Tunnel
Damage identification
Wavelet packet transform
Standard error of curvature energy
