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苏通大桥斜拉桥伸缩缝位移的长期监测与分析

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Keywords: 桥梁工程,结构健康监测,概率统计,斜拉桥,伸缩缝,位移,温度

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Abstract:

以苏通大桥斜拉桥347d的伸缩缝位移为对象,研究苏通大桥斜拉桥伸缩缝服役性能评价方法。首先提出了伸缩缝位移的概率统计分析方法,在此基础上验证了伸缩缝设计性能。其次,提出了伸缩缝位移与温度的相关性分析方法,在此基础上评价了伸缩缝使用性能。分析结果表明①苏通大桥斜拉桥的伸缩缝位移可以通过2个正态分布函数的加权和来描述其概率分布,温度年变化作用下伸缩缝的极值位移远小于伸缩缝设计位移;②苏通大桥斜拉桥伸缩缝位移与温度具有良好的线性相关性,并且苏通大桥北端的伸缩缝存在性能退化的可能,需要积累更多的数据进行分析。

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