基于小波分析的跨海大桥斜拉索风致损伤识别

发布时间：2018-05-04 16:19

本文选题：跨海大桥 + 斜拉索　；参考：《浙江工业大学学报》2017年06期

【摘要】：海域环境下服役的斜拉索要承受强台风、环境腐蚀、重车过桥和温度效应等破坏荷载的作用,可能出现损伤破坏,降低拉索的强度和服役寿命.因此,如何有效快速地识别斜拉索是否发生了损伤,进一步识别出哪根索出现了损伤,这对于桥梁运营养护获得第一手的构件损伤信息是十分重要的.以浙江舟山跨海大桥中的金塘大桥为工程背景,建立了风荷载作用下的斜拉桥数值模型,基于小波分析方法研究了斜拉索损伤对桥面加速度测试信号的敏感性,实现了斜拉索损伤时刻的识别;构建了一种多尺度的损伤指标和损伤位置识别方法,进行了斜拉索损伤位置的识别,并分析验证了这种损伤识别方法的有效性和适用性.
[Abstract]:The cable-stayed in service in the sea area demands to bear the damage load such as strong typhoon, environmental corrosion, heavy truck crossing bridge and temperature effect, which may lead to damage and damage, and reduce the strength and service life of the cable. Therefore, it is very important for bridge operation and maintenance to obtain first-hand damage information for bridge members, how to identify whether the cable is damaged or not and which cable is damaged effectively and quickly. Based on the Jintang Bridge in Zhoushan, Zhejiang Province, a numerical model of cable-stayed bridge under wind load is established. The sensitivity of cable damage to the acceleration test signal of bridge deck is studied based on wavelet analysis method. A multi-scale damage index and damage location identification method is constructed to identify the damage location of stay cables. The validity and applicability of this damage identification method are analyzed and verified.
【作者单位】：浙江工业大学建筑工程学院;浙江大学建筑工程学院;
【基金】：国家自然科学基金资助项目(50808160,51578506) 国家重点研发计划课题(2016YFC0802201)
【分类号】：U448.27

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