摘要
针对在役桥梁钢筋混凝土桩缺陷问题,采用侧向激励的方式进行检测,侧向激励产生纵波和横波,由于相互干涉而导致反射波信号中很难分辨出缺陷反射信息;此外,考虑到位移响应很小,为此,本文采用加速度响应作为测试数据以降低噪声的影响。为了识别这类复杂响应下缺陷位置及缺陷程度,一种具有明显区别的特征曲线方法被提出,从最后结果来看,本文方法是可行的。
Aiming at the defect of existing bridges, a side-excitation way is adopted. Because of the mutual interfere phenomenon between transverse-wave and longitudinal-wave, it is hard to diagnose the position of defect. Meanwhile, considering the responses of displacement are too lower, the velocity re- sponses is used as test data so as to reduce the influence of noise. In the paper, the eigencurves with ob- vious distinction is suggested, the feasibility of the proposed method is demonstrated according to the re- sults.
出处
《低温建筑技术》
2015年第4期126-128,共3页
Low Temperature Architecture Technology
关键词
小波分析
在役桥梁
侧向激励
特征曲线
wavelet transform
existing bridges
velocity responses
eigencurve
