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大跨悬索桥梁端位移与温度的相关性研究及其应用

, PP. 54-58

Keywords: 桥梁工程,悬索桥,梁端位移,季节相关性,结构异常状态

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Abstract:

对润扬大桥悬索桥160d的梁端位移响应与钢箱梁温度实测数据进行了季节相关性研究,并应用于结构的整体状态监测。针对润扬大桥悬索桥梁端位移与温度之间明显的季节相关性,采用6次多项式模型对梁端位移-温度进行了统计建模,并采用均值控制图法对梁端位移的异常变化进行了判别分类。主梁南北端由于温度引起的梁端位移年变化幅度分别为38.8、37.4cm,而采用均值控制图法可以识别出由于结构损伤所引起的梁端位移0.8cm的异常变化。结果表明,本文方法可以有效地消除温度的季节变化对悬索桥实测梁端位移的影响,较好地识别出结构损伤引起梁端位移的异常变化。

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