摘要
基于东海大桥长期健康监测数据,采用伸缩缝位移监测数据计算主航道桥桥长变化量,并分析了桥长变化量与环境因素中温度和风荷载之间的关系。分析结果表明:温度是桥长变化量的主要影响因素,风荷载与伸缩缝位移的相关性很弱,其对桥长变化量的影响可以忽略不计。建立起的桥长变化量与结构有效温度之间的线性回归模型可用于检验伸缩缝位移监测值的可信度;建立起的伸缩缝位移累计行程与时间的回归模型能够为伸缩缝的选型、维护及更换提供一定的依据。
Based on the long-term health monitoring data of Donghai Bridge, the article calculates the length variation of the main channel of bridge by the displacement monitoring data of expansion joint, and analyzes the relationship between the length variation of the bridge and the temperature and wind load in the environmental factors. The analysis result shows that the temperature is the main influence factor on the length variation of the bridge, the relativity of wind load and expansion joint displacement is weak, and its influence on the length variation of the bridge can be negligible. The built-up linear regression model between the length variation of the bridge and the effective temperature of the structure can be used to inspect the reliability of monitoring value of expansion joint displacement. The built-up regression model of the cumulative process and time of expansion joint displacement can be referred for the selection, maintenance and replacement of expansion joint.
出处
《城市道桥与防洪》
2013年第9期63-67,9,共5页
Urban Roads Bridges & Flood Control
关键词
健康监测
伸缩缝位移
桥长变化量
环境因素
有效温度
health monitor
displacement of expansion joint
length variation of bridge
environmental factor
effective temperature
