基于小波多尺度的索塔锚固区变形特征提取  

Deformation features extraction for a cable-tower anchorage zone based on wavelet multi-scale

作　　者：张宁宁[1,2] 陈志坚[2] 陈元俊[2] 

机构地区：[1]华电电力科学研究院,杭州310030 [2]河海大学地球科学与工程学院,南京210098

出　　处：《振动与冲击》2012年第8期102-106,共5页Journal of Vibration and Shock

基　　金：国家十一五科技支撑资助项目(2006BAG04B05);973资助项目(2002CB412707)

摘　　要：苏通大桥索塔锚固区高频度监测数据显示,在造成数据失真的各种噪声中,温度对类似索塔高耸构筑物的影响尤其明显,会使其产生"背日葵"现象,为查清温度导致的索塔变形情况,准确评估索塔的安全性,结合实时的气象资料和工况,分时段采用小波多尺度去噪方法逐层分离出温度产生的索塔偏离度,提取因实际工况产生的索塔锚固区变形特征。为锚固区传力机理及施工控制提供可靠的计算分析依据,对高耸构筑物受力分析具有很好的工程应用前景。Frequently monitoring data for the cable-tower anchorage zone of Sutong Bridge showed that in the various noises leading to data distortion, tall structures, such as, cable towers are obviously affected by temperature and backward-sunflower phenomena appear. In order to find the deformation of cable-tower caused by temperature and accurately evaluate the safety of cable-tower, combining the real-time meteorological date and the construction schedule, adopting the wavelet multi-scale denoising method at regular time intervals, the excursion of cable tower caused by temperature was extracted step by step. The deformation features of cable-tower anchorage zone brought by construction condition were extracted. Reliable calculation and analysis basis for mechanical behavior of anchorage zone and construction control were provided.

关 键 词：索塔锚固区 温度 变形 小波多尺度去噪 

分 类 号：U441[建筑科学—桥梁与隧道工程]