苏通大桥斜拉桥伸缩缝位移的长期监测与分析

发布时间：2018-12-15 22:56

【摘要】：以苏通大桥斜拉桥347 d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。
[Abstract]:Taking the expansion joint displacement of 347d cable-stayed bridge of Sutong Bridge as the object, the service performance evaluation method of the expansion joint of Sutong Bridge Cable-Stayed Bridge is studied. The probabilistic and statistical analysis method of expansion joint displacement is put forward, and the design performance of expansion joint is verified. Secondly, the correlation analysis method between expansion joint displacement and temperature is put forward, and the performance of expansion joint is evaluated. The results show that: 1 the expansion joint displacement of the cable-stayed bridge of Sutong Bridge can be described by the weighted sum of two normal distribution functions, and the extreme displacement of the expansion joint is much smaller than the design displacement of the expansion joint under the action of annual temperature change; 2There is a good linear correlation between the expansion joint displacement and the temperature of the cable-stayed bridge of Sutong Bridge, and the expansion joint of Sutong Bridge has the possibility of performance degradation, so it is necessary to accumulate more data for analysis.
【作者单位】：东南大学混凝土及预应力混凝土结构教育部重点实验室;交通运输部公路科学研究院;江苏省交通科学研究院股份有限公司;
【基金】：国家自然科学基金项目(51178100) 国家科技支撑计划项目(2014BAG07B01) 交通运输部“十二五”重大科技专项项目(2011318223190)
【分类号】：U443.31;U448.27

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