【摘要】 桥梁结构在其服役过程中,由于荷载作用和各种环境作用等影响,不可避免的会产生累积损伤和功能退化,甚至会导致突发事故。因此,对桥梁的工作状态进行健康监测,避免事故发生,已成为当前研究的一个热点。结合一个3跨18m长的大型连续刚构桥模型试验,采用曲率模态法,对不同荷载工况下桥梁结构的损伤情况进行研究,分析其识别能力。结果表明,通过桥梁曲率模态的变化可以判断其损伤情况,从而监测桥梁的工作状态。更多还原

【Abstract】 During the service life of a bridge, it is impossible to avoid damage accumulation and function degeneration or even an accident due to traffic load, environmental corrosion. Hence, the health monitoring of bridges have been received wide concern to prevent the sudden fatal accidents. This paper presents the experiment and the damage evaluation on a large-scale continuous rigid frame concrete bridge with 3 spans and a total length of 18m. Ten different load cases were tested to simulate different levels of overload and curvature mode method was adopted to detect the damage after the load cases. By monitoring the changes of curvature modes, the damage detection shows good performance to give the working status and the damage position of the bridge. It can be concluded that this method could be used in real structural health monitoring.更多还原