ABSTRACT

The modeling of structural damping due to the excitation of elastic-waves into the surrounding soil domain, and its effect on structural response as apparent modal damping is explored herein. Four high-fidelity, linear finite-element models of building-site systems, with 20–50 storeys and 2–7 basement levels, are simulated in OpenSees to evaluate their frequency response. Radiation-damping is provided by a layer of high-damping elements, whose design is explored in detail. Results show that up to 1% of apparent, low-amplitude damping can be attributed to radiation-damping depending on number of stories and depth of embedment.

中文翻译：

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使用高保真有限元建模和吸收性外部边界对建筑物中的振动能量损失建模为弹性波

摘要

本文探讨了由于弹性波激发到周围土壤域中的结构阻尼建模，以及它对结构响应的影响，如表观模态阻尼。在 OpenSees 中模拟了 20-50 层和 2-7 层地下室的四个高保真、线性有限元模型，以评估它们的频率响应。辐射阻尼由一层高阻尼元件提供，对其设计进行了详细探索。结果表明，取决于层数和嵌入深度，高达 1% 的表观低振幅阻尼可归因于辐射阻尼。