摘要
复杂动态荷载作用下的桥梁实时动态监测对保障桥梁的安全十分重要。以天津市富民桥为监测对象,采用全球卫星导航系统(GNSS)实时动态差分(RTK)技术对环境激励下富民桥进行监测试验。提出小波包分解(WPD)和集合经验模态分解技术(EEMD)的联合滤波方法(WPD-EEMD)对实测数据进行降噪处理,再采用滑动平均滤波方法(MAF)进一步处理降噪后的实测数据。结果表明,该方法可有效抑制GNSS多路径效应误差和随机误差,使动态变形监测的精度和稳定性得到了大大提高。
Real-time dynamic monitoring of Bridges under complex dynamic loads is very important to ensure the safety of Bridges.Global Navigation Satellite System(GNSS)under Real Time Kinematic(RTK)mode was employed to monitor Tianjin Fumin Bridge under environmental excitation.The combined filtering method(WPD-EEMD)of wavelet packet decomposition(WPD)and ensemble empirical mode decomposition(EEMD)was proposed to denoise the measured data.Then the moving average filtering method(MAF)was used to further process the measured data after denoising.The results show that this method can effectively suppress GNSS multipath effect error and random error and greatly improve the accuracy and stability of dynamic deformation monitoring.
作者
李志
张雪芳
LI Zhi;ZHANG Xuefang(Changjiang River Scientific Research Institute,Wuhan Hubei 430010,China;China Academy of Building Research,Beijing 100013,China)
出处
《工程质量》
2021年第11期19-23,共5页
Construction Quality
