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首页> 外文会议>Coupled site and soil-structure interaction effects with application to seismic risk mitigation >RECENT MEASUREMENTS OF AMBIENT VIBRATIONS IN FREE-FIELD AND IN BUILDINGS IN CROATIA
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RECENT MEASUREMENTS OF AMBIENT VIBRATIONS IN FREE-FIELD AND IN BUILDINGS IN CROATIA

机译：克罗地亚自由场和建筑物中环境振动的最新测量

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摘要

Recent measurements of ambient vibrations in Croatia include free-field measurements in Zagreb and Ston, as well as those done within buildings. Free-field data at both localities are consistent with the properties of shallow geological structures there. In Zagreb, horizontal-to-vertical spectral ratios (HVSR) of microtremors point to existence of thick alluvial cover (over 100 m) that gradually gets thinner as it reaches the southern slopes of the Mt. Medvednica. In Ston HVSR profiles reveal several tens of meters thick sedimentary cover over the bedrock which gets exposed at the Stovi§ hill. Over 100 measurements of ambient vibrations in buildings that have recently been performed across Croatia, were analysed by a suite of Matlab routines yielding frequencies and damping for the fundamental and higher modes of oscillation. Applications to real buildings proved that analyses of shaking induced by ambient vibrations in most cases lead to well constrained, reliable, and time independent estimates of frequencies and damping of the building vibrational modes. The measurements done so far form the initial nucleus of the Croatian building inventory, a collection of observed fundamental periods, damping, and spectral shapes, which can prove important in documenting building structural integrity and in assessing the degree of possible damage in future earthquakes.
机译：克罗地亚最近对环境振动的测量包括萨格勒布和斯通的自由场测量以及建筑物内的自由场测量。两个地方的自由场数据都与那里的浅层地质构造的性质一致。在萨格勒布，微震的水平-垂直光谱比（HVSR）指出存在厚的冲积层（超过100 m），当它到达山的南坡时逐渐变薄。 Medvednica。在Ston的HVSR剖面显示出基岩上数十米厚的沉积覆盖层，该覆盖层在Stovi§山暴露。最近通过克罗地亚的一套Matlab例行程序分析了最近在克罗地亚进行的建筑物中环境振动的100多次测量，得出了基本和更高振动模式的频率和阻尼。在实际建筑中的应用证明，在大多数情况下，分析由环境振动引起的震动会导致对建筑物的振动模式的频率和阻尼进行严格约束，可靠且时间独立的估计。到目前为止，已完成的测量形成了克罗地亚建筑物清单的原始核心，观察到的基本周期，阻尼和频谱形状的集合，这对于证明建筑物结构的完整性以及评估未来地震可能的破坏程度非常重要。

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