挠度监测数据中活载效应的快速提取

Rapid extraction of live load effects from deflection monitoring data

中小跨径桥梁车辆过桥时间短,在较小时间尺度内,利用挠度信号的周期性,运用曲线平滑法将挠度信号分解为温差效应和车辆效应。以实际工程中20 m跨径简支梁桥为例,使用该方法对挠度监测数据中车辆荷载效应进行提取,并与已有方法进行对比。结果表明,曲线平滑法提取车辆荷载挠度精度高且简单易行。

The vehicle crossing time of medium and small span bridges is broken.The deflection signal is decomposed into temperature difference effect and vehicle effect by using the method of curve smoothing in a small time scale.Taking a 20 m-span simply-supported beam bridge in a practical project as an example,this method is used to extract the vehicle load effect from the deflection monitoring data,and compared with the existing literature methods.The results show that the curve smoothing method is accurate and simple to extract the vehicle load deflection.