基于结构监测数据的PC连续梁桥实时位移校验系数研究

Research on Real-time Deflection Calibration Coefficient of PC Continuous Beam Bridge Based on Structural Monitoring Data

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摘要针对校验系数计算,传统的荷载试验方法需临时封闭交通,限制车辆行驶,难以对桥梁性能进行实时评估。随着桥梁监测技术的快速发展,可实时获取桥梁关键运行参数,为实现桥梁性能的不停车实时评估提供了可能。基于某3跨PC连续梁桥车辆荷载及实时位移监测数据,采用带通滤波、最大值样本概率分析等方法对车载作用与位移响应进行关联分析,并提出实时校验系数计算方法。结果表明:1)以0.001 Hz为分界频率,对实时位移数据进行带通滤波分析,可实现车载及温度作用下位移响应有效分离;2)车载作用下跨中位移最大值概率分布符合极值Ⅰ型分布规律;3)选用跨中位移概率密度分布峰值为特征值计算校验系数,可有效评估桥梁性能。 Load test for testing deflection calibration coefficient needs a tempory traffic closure which restricts vehicle traffic and is hard to make a real-time evaluation on bridge performance.With the rapid development of bridge monitoring technology,key operating parameters of bridges can be obtained in real-time,which provides a possibility for real-time evaluation of bridge performance.In this paper,based on the monitoring data of a three span PC continuous beam bridge,the correlation analysis between vehicle effect and displacement response is realized by band-pass filtering and maximum probability density distribution diagram and a real-time verification coefficient calculation method is proposed.Analysis results show that:1)Displacement response under vehicle and temperature effects can be separated effectively by performing band-pass filtering on real-time deflection data with a frequency of 0.001 Hz as the boundary;2)The probability distribution of the maximum mid span displacement under vehicle effect conforms to the extreme value I-type distribution law.;3)The peak value of probability density distribution of mid span displacement is selected as the characteristic value to calculate the calibration coefficient,which can evaluate the bridge performance effectively.

作者王文剑吴官正刘龑李波 WANG Wenjian;WU Guanzheng;LIU Yan;LI Bo(China Design Testing Technology Co.,Ltd.,Nanjing 211135;Nanjing Institute of Surveying,Mapping&Geotechnical Investigation Co.,Ltd.,Nanjing 210000)

机构地区华设检测科技有限公司南京市测绘勘察研究院股份有限公司

出处《公路交通技术》 2023年第4期94-99,共6页 Technology of Highway and Transport

关键词 PC连续梁桥车辆荷载监测数据实时位移带通滤波最大值样本概率分析校验系数 PC continuous beam bridge traffic load monitoring data real-time deflection band-pass filtering maximum probability density distribution diagram calibration coefficient

分类号 U448.216 [建筑科学—桥梁与隧道工程]

作者简介王文剑(1992-),女,江苏省南京市人,硕士,工程师,研究方向为桥梁安全监测及评估。E-mail:1479325702@qq.com。