苏通大桥斜拉桥伸缩缝位移的长期监测与分析  

Long-term Monitoring and Analysis of Expansion Joint Displacement of Sutong Cable-stayed Bridge

作　　者：丁幼亮[1] 周凯[1] 王高新[1] 王晓晶[2] 张宇峰[3] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [2]交通运输部公路科学研究院,北京100088 [3]江苏省交通科学研究院股份有限公司,江苏南京210017

出　　处：《公路交通科技》2014年第7期60-64,71,共6页Journal of Highway and Transportation Research and Development

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)

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。With regard to the monitoring data of expansion joint displacement of Sutong Cable-stayed Bridge in 347 d, the evaluation method for the expansion joint service performance of the bridge is researched. First, the probability statistical analysis method for the expansion joint displacement is established, on the basis of which the design performance of the expansion joints is verified. Then, the correlation analysis method between the expansion joint displacement and temperature is established, on the basis of which the service performance of the expansion joints is evaluated. The analysis results reveal that （ 1 ） the expansion joint displacement of Sutong Cable-stayed Bridge can be described by the probability distribution through the weighted sum of 2 normal distribution functions, and the extreme value of the expansion joint displacement under annual temperature action is less than the design displacement; （2） the expansion joint displacement of Sutong Cable-stayed Bridge is highly linearly correlated with temperature. The end of the bridge exists the possibility further analysis. of performance degradation, which needs expansion joints in the north more data accumulation for

关 键 词：桥梁工程 结构健康监测 概率统计 斜拉桥 伸缩缝 位移 温度 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]