基于曲线相似性理论的高桩码头桩基腐蚀厚度检测方法研究  

Research on the Detection of Pile Corrosion Thickness of High-Pile Wharf Base on Curve Similarity Theory

作　　者：叶宇旻 周林根 谢兴博[3] 

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032 [2]上海东华建设管理有限公司,上海200032 [3]中国人民解放军理工大学,江苏南京210007

出　　处：《海岸工程》2014年第4期64-70,共7页Coastal Engineering

基　　金：国家自然科学基金--超长细比路堤桩屈曲理论分析及透明土模型试验研究(51178160)

摘　　要：桩基属于柔性结构,低频密集,不利于检测。本研究利用小波变换法可以分离高频成份的特点,提出了利用高频成份和曲线相似性理论相结合的腐蚀厚度识别方法,并以天津港某梁板式码头为例进行了应用,具体步骤为:根据目前研究成果,确定五种典型工况,计算其动力反应;采用小波变换获得突出高频成份的特征曲线;借鉴曲线识别思想,根据实测曲线与特征曲线的相似度确定腐蚀厚度。结果表明,该方法具有较好的效果。The piles belong to a flexible structure and are dense in low--frequency, thus being not advantageous to the detection of corrosion. By using the character that high-- frequency components can be separated by wavelet transform, a method for detecting the pile corrosion thickness is proposed, which combines the high--frequency compo- nents with the curve similarity theory. The concrete steps of the method are as the followings： to define five corrosion cases based on the current research results and calculate their dynamic responses; to transform by choosing suitable wavelet base and acquire the wavelet curves of different corrosion thicknesses by means of dimensionless method; to obtain the high--frequency components through Fourier transformation of the wavelet curves and hence to determine the pile corrosion thickness based on the frequency. At last, a computation example is presented. The result shows a better effect by using this method.

关 键 词：桩码头 相似性 小波变换 腐蚀厚度 

分 类 号：TU473.16[建筑科学—结构工程]