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首页> 外文会议>International conference on sustainable development of critical infrastructure 2014 >Displacement monitoring of expansion joints of long-span steel bridges with viscous dampers
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Displacement monitoring of expansion joints of long-span steel bridges with viscous dampers

机译：带粘性阻尼器的大跨度钢桥伸缩缝位移监测

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This paper presents the displacement monitoring of expansion joints of long-span steel bridges, with emphasis laid on the effeet of viscous dampers, Monitored data from the Sutong Bridge and the Jiangyin Bridge were analyzed and compared with those of the Runyang Suspension Bridge. Decomposition of displacement signals in various frequency bands shows that the temperature-induced movements are only a very small portion of the total cumulative displacements: while due to the small but fast movements caused by vchicle/wind loads, the cumulative displacements of long-span steel bridges may be very considerable. The v iscous dampers can reduce the vehicle/wind-induced displacements but have no significant influence on the temperature-induced movements. In addition. the measured temperature-displacement relationships of the Sutong Bridge are not linear ones, as reported previously, but are hysterelic, which is due to the time delay between temperature and displacement signals.
机译：本文介绍了大跨度钢桥伸缩缝的位移监测，重点是粘性阻尼器的作用，对苏通大桥和江阴大桥的监测数据进行了分析，并与润扬悬索桥的监测数据进行了比较。在各个频带上的位移信号的分解表明，温度引起的运动只是总累积位移的很小一部分：由于车/风载荷引起的很小但快速的运动，大跨度钢的累积位移桥梁可能非常重要。减压阻尼器可以减少车辆/风引起的位移，但对温度引起的运动没有重大影响。此外。如前所述，苏通大桥测得的温度-位移关系不是线性的，而是迟滞的，这是由于温度和位移信号之间的时间延迟所致。

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