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

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：[1]华设检测科技有限公司,南京211135 [2]南京市测绘勘察研究院股份有限公司,南京210000

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

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.

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 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]