基于桥梁健康监测系统的风险事件管理研究

Research on Risk Event Management Based on Bridge Health Monitoring System

桥梁健康监测系统对于桥梁风险事件管理具有重要意义,而监测指标的真实性是其实现功能的前提。通过诸多桥梁风险事件管理案例可知,当前桥梁健康监测系统在应用中面临的关键问题之一为模态参数辨识能力欠佳。针对该问题提出改进模态参数识别方法,使桥梁在风险事件发生时结构特性的变化能够被准确识别出,为桥梁风险事件应急处置提供了可靠的数据支撑。结合某预应力混凝土矮塔斜拉桥在桥面拥堵事件过程中的监测数据,验证了所提方法在实际工程分析中的有效性。

Bridge health monitoring system is of great significance for bridge risk event management,and the authenticity of monitoring indicators is the premise of its function.Through many bridge risk event management cases,it can be seen that one of the key problems faced by the current bridge health monitoring system in application is the poor ability of modal parameter identification.Aiming at this problem,an improved modal parameter identification method is proposed,so that the change of structural characteristics of the bridge can be accurately identified when the risk event occurs,which provides reliable data support for the emergency disposal of bridge risk events.Combined with the monitoring data of a prestressed concrete extradosed cable-stayed bridge during the bridge deck congestion event,the effectiveness of the proposed method in practical engineering analysis is verified.