Monitoring temperature effect on a long suspension bridge
Monitoring temperature effect on a long suspension bridge
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DOI：
10.1002/stc.340
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发表时间：
2009-04
影响因子：
5.4
通讯作者：
You-lin Xu;Bo Chen;C. Ng;K. Wong;W. Y. Chan
中科院分区：
文献类型：
--
作者：
You-lin Xu;Bo Chen;C. Ng;K. Wong;W. Y. Chan
香港的青马大桥是一座很长的悬索桥。自1997年起，香港路政署在大桥上安装了一个风力和结构健康监测系统（WASHMS）。WASHMS的设计是为了监测环境状况、交通荷载、桥梁特征和桥梁响应。环境状态包括由温度传感器监测的温度环境，而桥梁响应包括由位移传感器、水平传感站和全球定位系统（GPS）记录的位移响应。然而，桥梁位移响应是由风、温度、公路和铁路四种主要荷载的组合引起的。本研究主要探讨青马大桥的温度环境及主要温度效应。首先介绍了青马大桥的主要特点和相应的监测系统。对从四种类型的传感器收集的数据进行预处理。根据实测数据统计了环境气温、有效温度和桥梁位移响应。最后建立了有效温度与桥梁位移之间的统计关系。这些结果对监测青马大桥的温度效应是有用的。版权所有© 2009约翰威利父子有限公司。
The Tsing Ma Bridge in Hong Kong is a long suspension bridge. A wind and structural health monitoring system (WASHMS) has been installed in the bridge and operated by the Hong Kong Highways Department since 1997. The WASHMS is devised to carry out the monitoring of environmental status, traffic loads, bridge features and bridge responses. The environmental status includes temperature environment monitored by temperature sensors, whereas the bridge responses contain displacement responses recorded by displacement transducers, level sensing stations, and global positioning systems (GPS). Bridge displacement responses are, however, induced by a combination of four major types of loadings due to wind, temperature, highway, and railway. This investigation focuses on the temperature environment and the predominating temperature effect on the Tsing Ma Bridge. The main features and the pertinent monitoring system of the Tsing Ma Bridge are first introduced. The data collected from the four types of sensors are pre‐processed. The statistics of ambient air temperature, effective temperature and displacement response of the bridge are then figured out based on the measurement data. The statistical relationship between the effective temperature and the displacement of the bridge is finally established. These results are useful for monitoring temperature effects on the Tsing Ma Bridge. Copyright © 2009 John Wiley & Sons, Ltd.