Determination of water level effects on the dynamic characteristics of a prototype arch dam model using ambient vibration testing
Determination of water level effects on the dynamic characteristics of a prototype arch dam model using ambient vibration testing
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DOI：
10.1111/j.1747-1567.2010.00671.x
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发表时间：
2012
影响因子：
1.6
通讯作者：
B. Sevim;B. Sevim;A. Bayraktar;A. Altunışık;S. Adanur;M. Akköse
中科院分区：
文献类型：
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作者：
B. Sevim;B. Sevim;A. Bayraktar;A. Altunışık;S. Adanur;M. Akköse
本文利用环境振动试验研究了水位变化对原型拱坝动力特性的影响。实现这一目的涉及原型拱坝水库基础模型在实验室下的建设。坝体高60 cm。通过环境振动试验，估算了拱坝在不同水位下的自振频率、振型和阻尼比。在环境振动试验中，环境激励由小冲击效应提供，并测量拱坝的响应。从研究中可以看出，自然频率在0-30 cm水位之间没有过度变化;但是，随着水位的升高，自然频率会增加。空库（H = 0 cm）和满库（H = 60 cm）时拱坝的第一阶自振频率相差约20- 25%。
This study investigated the water level effects on the dynamic characteristics of a prototype arch dam model using ambient vibration testing were investigated. Achievement of this purpose involved construction of a prototype arch dam-reservoir-foundation model under laboratory. The dam body was constructed with 60 cm height. Ambient vibration tests on the arch dam estimated its natural frequencies, mode shapes and damping ratios for different water levels. In the ambient vibration tests, ambient excitations are provided from small impact effects and the responses of the arch dam are measured. It can be stated from the study that natural frequencies are not overly changed among 0–30 cm water levels; however they are increased for higher water levels. The difference between the first natural frequencies of the arch dam obtained from empty reservoir (H = 0 cm) and full reservoir (H = 60 cm) is about 20–25%.