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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Characterization of the dynamic behavior of a concrete arch dam by means of forced vibration tests and numerical models
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Characterization of the dynamic behavior of a concrete arch dam by means of forced vibration tests and numerical models

机译：用强制振动试验和数值模型来表征混凝土拱坝的动态行为

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The characterization of the dynamic behavior of an arch dam, and its evolution throughout the structure's lifetime, provides important data for the safety control process. Forced vibration tests remain a reliable technique for this purpose. The Baixo Sabor dam is a 123 m high arch dam recently built in Portugal. Forced vibration tests were performed before and after the reservoir filling. Two techniques for forced vibration test are compared, discrete frequency scanning, the standard methodology, and continuous frequency scanning (sine sweep), a new proposed methodology, which allowed faster results without loss of precision. For the interpretation of test results two numerical models of the dam-reservoir-foundation system were built, and calibrated with the experimental data. A good match of numerical and experimental results was obtained for the six lowest frequencies and corresponding mode shapes.
机译：拱门大坝动态行为的表征及其在整个结构的寿命中的演化，为安全控制过程提供了重要数据。强制振动测试仍然是为此目的的可靠技术。 Baixo Sabor Dam是一家123米的高拱坝，最近建于葡萄牙。在储层填充之前和之后进行强制振动试验。比较了强制振动测试的两种技术，离散频率扫描，标准方法和连续扫描（正弦扫描），一种新的提议方法，这允许更快的结果而不会损失精度。对于测试结果的解释，建立了两种数值模型，并用实验数据校准。为六个最低频率和相应的模式形状获得了良好的数值和实验结果的匹配。

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