Continuous ambient‐vibration monitoring of the arch dam of Mauvoisin
Continuous ambient‐vibration monitoring of the arch dam of Mauvoisin
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DOI：
10.1002/eqe.118
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发表时间：
2002-02
影响因子：
4.5
通讯作者：
G. Darbre;J. Proulx
中科院分区：
文献类型：
--
作者：
G. Darbre;J. Proulx
本文介绍了在毛沃辛250m拱坝上进行的连续环境振动记录程序的试验方案和结果。该项目遵循了之前对七个不同水位完成的一系列测量。大坝上设置了一个自动化系统，并在6个月的时间里每天记录两次环境振动。在整个测试期间跟踪了频率变化，并确定了水位变化的影响。结果证实了在之前的环境振动和强迫振动测试中观察到的行为。对于较低的水库水位，由于静水压力的增加，大坝的硬化克服了附加质量的影响。当水位较高时，这一趋势就会逆转。没有发现任何与温度有关的影响。简要介绍了实验技术，讨论了频率识别过程及其局限性。版权所有©2001 John Wiley&Sons，Ltd.
This paper presents the experimental programme and results of a continuous ambient vibrations recording programme carried out on the 250 m arch dam of Mauvoisin. This project follows a series of previous measurements completed for seven different water levels. An automated system was set up on the dam and the ambient vibrations were recorded twice daily for a period of 6 months. Frequency shifts were tracked throughout the testing period and the effects of the varying water level were identified. The results confirmed the behaviour observed in previous ambient‐ and forced‐vibration tests. The added‐mass effects are overcome by the stiffening of the dam due to increasing hydrostatic pressure for lower reservoir levels. This trend is then reversed for higher water levels. Any temperature‐related effects were not identified. The experimental techniques are briefly described and the frequency identification process and its limitations are discussed. Copyright © 2001 John Wiley & Sons, Ltd.