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.
出处
《振动与冲击》
EI
CSCD
北大核心
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)
关键词
索塔锚固区
温度
变形
小波多尺度去噪
cable-tower anchorage zone
temperature
deformation
wavelet multi-scale denoising
