Sliding bearings of a bridge are important sliding elements that accommodate the bridge movement caused by temperature action and vehicle/wind load. The sliding life of sliding bearings is determined by the wear of the sliding materials in the bearing. However, the wear of sliding bearings primarily results from a large amount of cumulative sliding displacement experienced by the sliding bearing, even if the movement of the bridge under the vehicle/wind load is far less than the allowable design displacement of the sliding bearing. In general, bearing displacement is monitored using displacement gauges with a low sampling frequency, which cannot accurately capture the relatively high‐frequency displacement component caused by vehicle/wind loads. For predicting the sliding life of sliding bearings, this paper provides a mode rotation angle superposition approach to estimate cumulative sliding displacement. The estimation approach incorporates the combination of the rotation angles of bridge ends and the modal parameters of bridges. The feasibility and advantage of the estimation approach are illustrated by a numerical example; then, the influence factors of the error are analysed. Finally, sliding life prediction of sliding bearings is applied to an actual bridge using the estimation approach of cumulative sliding displacement.

中文翻译：

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利用桥梁动态监测数据预测滑动轴承的滑动寿命

桥梁的滑动轴承是重要的滑动元件，可适应温度作用和车辆/风荷载引起的桥梁运动。滑动轴承的滑动寿命取决于轴承中滑动材料的磨损。然而，即使桥梁在车辆/风​​荷载下的运动远小于滑动轴承的允许设计位移，滑动轴承的磨损主要还是由滑动轴承经历的大量累积滑动位移引起的。通常，使用低采样频率的位移计监测轴承的位移，该位移计无法准确捕获由车辆/风荷载引起的相对较高的频率位移分量。为了预测滑动轴承的滑动寿命，本文提供了一种模式旋转角叠加方法来估计累积滑动位移。估计方法结合了桥端的旋转角度和桥的模态参数的组合。数值算例说明了该估计方法的可行性和优势。然后，分析了误差的影响因素。最后，利用累积滑动位移的估计方法将滑动轴承的滑动寿命预测应用于实际桥梁。分析了误差的影响因素。最后，利用累积滑动位移的估计方法将滑动轴承的滑动寿命预测应用于实际桥梁。分析了误差的影响因素。最后，利用累积滑动位移的估计方法将滑动轴承的滑动寿命预测应用于实际桥梁。