RADIATION DAMPING OBSERVED FROM SEISMIC RESPONSES OF BUILDINGS
RADIATION DAMPING OBSERVED FROM SEISMIC RESPONSES OF BUILDINGS
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发表时间：
1999
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通讯作者：
M. Çelebi
中科院分区：
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作者：
M. Çelebi
阻尼的确定对结构的动力响应分析和评估是至关重要的，在未来事件中评估其性能。在大多数情况下，当进行动态分析时，临界阻尼百分比采用四舍五入的经验值，这些经验值仅代表结构阻尼。然而，辐射阻尼以及其他类型的阻尼可以对整体有效阻尼做出显著贡献。展示辐射阻尼的两种情况下，经常建筑物。详细讨论了这两座建筑的特点和场地条件。讨论了阻尼系数的提取方法。采用简单的方法确定了辐射阻尼比。这两座建筑的场地、地基和上部结构的特点表明，这类建筑的辐射阻尼可以是可观的，有利于评估它们对大地震的反应。如果辐射阻尼显著，则可将其纳入设计/分析程序。
Determination of damping for dynamic response analyses and evaluations of structures is of critical importance in assessing their performances during future events. In most cases, when dynamic analyses are performed, critical damping percentages are adopted from rounded empirical values which represent only structural damping. However, radiation damping, as well as other types of damping, can contribute significantly to the overall effective damping. Two cases of regular buildings that exhibit radiation damping are presented. The features of these two buildings and their site conditions are discussed in detail. The method used to extract damping percentages is discussed. Simple methods are used to confirm the radiation damping percentages. The characteristics of the site, foundation and superstructure of the two buildings are used to show that the radiation damping for such buildings can be substantial and beneficial in assessment of their responses to large earthquakes. If radiation damping is significant, it could be incorporated into the design/analysis procedures.