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基于健康监测系统的大跨度连续刚构桥移动荷载识别

, PP. 95-104

Keywords: 桥梁工程,大跨度连续刚构桥,二元线性回归,移动荷载,健康监测,应变响应,小波分析

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Abstract:

?为了得到桥梁实际运营的车辆荷载,通过建立由健康监测系统测得的应变响应与移动荷载的线性回归方程,提出了一种能有效应用于大跨度连续刚构桥的移动荷载识别方法。首先利用小波变换的方法进行应变信号消噪处理|然后利用应变响应特征估算移动车辆过桥的时间和速度|最后建立移动荷载车重力与应变响应的二次线性回归方程。计算结果表明:该方法得到的计算车重力与实测车重力相比,误差率基本小于17%|结合标准车辆模型,可以得到车辆的轴重分布。

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