【摘要】 将结构动载测试与小波分析相结合提出了适用于大跨桥梁结构的两阶段损伤诊断方法。采集桥梁结构在损伤前后各测点的动载测试数据并进行小波包分解得到小波包能量谱,在此基础上计算结构损伤预警指标和损伤定位指标,用以确定损伤的发生及其所在的区域。某三跨连续梁桥的数值模拟研究结果表明了本文所采用的损伤诊断方法的可行性与有效性。更多还原

【Abstract】 The two-stage damage assessment method for long-span bridges is proposed based on the combination of structural dynamic loading test and wavelet analysis.The dynamic responses at various measurement points of the bridge structures are recorded before and after structural damage,for which the wavelet packet decomposition is employed to obtain wavelet packet energy spectrums.The damage alarming indices and damage location indices are further calculated to detect the occurrence and the location of the structural damage.The numerical simulation results of a three-span continuous bridge verify the efficiency and effectiveness of the damage assessment method proposed in the paper.更多还原