基于长期健康监测数据的南溪长江大桥伸缩缝状态监测与评估研究
发布时间：2018-07-20 15:08
【摘要】：基于健康监测系统的桥梁结构状态预警与评估是目前国内外学术界和工程界的热点研究领域。如何有效地处理、分析和解读桥梁结构健康监测系统采集的长期海量数据,在此基础上建立桥梁结构的损伤状态预警方法、研究桥梁结构的损伤累积及演化规律、开展桥梁结构安全状态评估是桥梁结构健康监测所面临的重要科学问题。本文以南溪长江大桥悬索桥的伸缩缝为研究对象,以温度与伸缩缝位移监测数据为基础,开展了基于长期健康监测数据的大跨桥梁伸缩缝状态分析与评估的方法与应用研究。本文的主要工作和成果如下:(1)通过南溪长江大桥的健康监测系统,获取南溪长江大桥温度、位移的数据,并对数据进行整理与分析,得到连续的、完整的环境温度、结构温度及温度变形数据以及伸缩缝位移数据,为理论分析研究奠定了基础。(2)通过南溪长江大桥的温度监测数据,分析南溪长江大桥环境温度与结构温度关系,研究了桥梁顶板、底板及腹板结构温度随环境温度变化规律。(3)通过南溪长江大桥的伸缩缝位移监测数据,对伸缩缝位移数据进行概率统计分析,得出伸缩缝位移的概率模型;并通过伸缩缝一年中178天的位移最大值与最小值进行极值估计,对南溪长江大桥伸缩缝位移进行极值预测。(4)分析了环境温度对伸缩缝位移的影响规律,从而建立了基于长期监测数据的环境温度与伸缩缝位移模型。在此基础上建立了“温度环境条件归一化”的伸缩缝损伤预警方法。
[Abstract]:The early warning and evaluation of bridge structure condition based on health monitoring system is a hot research field in academic and engineering circles at home and abroad. How to deal with, analyze and interpret the long-term massive data collected by the bridge structure health monitoring system effectively, and then establish the damage state warning method of the bridge structure, and study the damage accumulation and evolution law of the bridge structure. It is an important scientific problem for bridge structure health monitoring to evaluate the safety state of bridge structure. Taking the expansion joint of the suspension bridge of Nanxi Yangtze River Bridge as the research object and based on the monitoring data of temperature and displacement of the expansion joint, the method and application of the analysis and evaluation of the state of the expansion joint of the long-span bridge based on the long-term health monitoring data are studied in this paper. The main work and achievements of this paper are as follows: (1) through the health monitoring system of Nanxi Yangtze River Bridge, the temperature and displacement data of Nanxi Yangtze River Bridge are obtained, and the data are collated and analyzed to obtain continuous and complete ambient temperature. The structure temperature and temperature deformation data and the expansion joint displacement data lay the foundation for theoretical analysis and research. (2) through the temperature monitoring data of Nanxi Yangtze River Bridge, the relationship between environment temperature and structure temperature of Nanxi Yangtze River Bridge is analyzed. The variation of temperature of bridge roof, floor and web with ambient temperature is studied. (3) through the monitoring data of expansion joint displacement of Nanxi Yangtze River Bridge, the probability statistical analysis of expansion joint displacement data is carried out, and the probability model of expansion joint displacement is obtained. By estimating the maximum and minimum displacement of the expansion joint in 178 days of the year, the maximum value of the expansion joint displacement of Nanxi Yangtze River Bridge is predicted. (4) the influence of environment temperature on the displacement of the expansion joint is analyzed. A model of environmental temperature and displacement of expansion joints based on long-term monitoring data is established. On the basis of this, the damage warning method of expansion joint is established, which is "normalization of temperature and environmental conditions".
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U446
[Abstract]:The early warning and evaluation of bridge structure condition based on health monitoring system is a hot research field in academic and engineering circles at home and abroad. How to deal with, analyze and interpret the long-term massive data collected by the bridge structure health monitoring system effectively, and then establish the damage state warning method of the bridge structure, and study the damage accumulation and evolution law of the bridge structure. It is an important scientific problem for bridge structure health monitoring to evaluate the safety state of bridge structure. Taking the expansion joint of the suspension bridge of Nanxi Yangtze River Bridge as the research object and based on the monitoring data of temperature and displacement of the expansion joint, the method and application of the analysis and evaluation of the state of the expansion joint of the long-span bridge based on the long-term health monitoring data are studied in this paper. The main work and achievements of this paper are as follows: (1) through the health monitoring system of Nanxi Yangtze River Bridge, the temperature and displacement data of Nanxi Yangtze River Bridge are obtained, and the data are collated and analyzed to obtain continuous and complete ambient temperature. The structure temperature and temperature deformation data and the expansion joint displacement data lay the foundation for theoretical analysis and research. (2) through the temperature monitoring data of Nanxi Yangtze River Bridge, the relationship between environment temperature and structure temperature of Nanxi Yangtze River Bridge is analyzed. The variation of temperature of bridge roof, floor and web with ambient temperature is studied. (3) through the monitoring data of expansion joint displacement of Nanxi Yangtze River Bridge, the probability statistical analysis of expansion joint displacement data is carried out, and the probability model of expansion joint displacement is obtained. By estimating the maximum and minimum displacement of the expansion joint in 178 days of the year, the maximum value of the expansion joint displacement of Nanxi Yangtze River Bridge is predicted. (4) the influence of environment temperature on the displacement of the expansion joint is analyzed. A model of environmental temperature and displacement of expansion joints based on long-term monitoring data is established. On the basis of this, the damage warning method of expansion joint is established, which is "normalization of temperature and environmental conditions".
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U446
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