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基于健康监测的悬索桥吊索疲劳可靠性评估

, PP. 76-80

Keywords: 桥梁工程,悬索桥,健康监测,疲劳可靠性,吊索

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Abstract:

以吉茶高速公路矮寨大桥为工程背景,介绍了桥梁健康监测系统在悬索桥吊索状态监测中的应用.通过对索力长期监测数据的统计分析发现,桥梁上下游对称位置吊索的测量数据存在一定偏差,但考虑全桥索力总和之后,上、下游吊索索力能保持平衡,这也验证了监测系统的有效性和精度.在此基础之上,采用基于S-N曲线的疲劳寿命评估方法对吊索疲劳寿命进行了预测.利用MATLAB程序结合雨流计数法统计计算了吊索等效应力幅,并对疲劳寿命可靠度进行了评估,认为被测吊索在大桥正常运营期间具有足够的疲劳可靠性.

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