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首页> 外文期刊>Bulletin of earthquake engineering >The effect of soil-structure interaction on the seismic risk to buildings
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The effect of soil-structure interaction on the seismic risk to buildings

机译：土壤结构互动对建筑物地震风险的影响

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摘要

This paper studies the effect of soil-structure interaction (SSI) on the seismic risk estimates of buildings. Risk, in this context, denotes the probability distribution of seismic monetary loss due to structural and nonstructural damage. The risk analysis here uncovers the probability that SSI is beneficial, detrimental, or uninfluential on seismic losses. The analyses are conducted for a wide range of buildings with different structural systems, numbers of stories, and foundation sizes on various soil types. A probabilistic approach is employed to account for prevailing sources of uncertainty, i.e., those in ground motion and in the properties of the soil-structure system. In this approach, probabilistic models are employed to predict the response, damage, and repair cost of buildings. To properly account for the ground motion uncertainty, a suite of nearly 7000 accelerograms recorded on soil is employed. It is concluded that structures on very soft soils are extremely likely to incur smaller losses due to SSI, which is in line with the common belief that SSI is a favorable effect for such systems. However, the results for buildings on moderately soft soils reveal a considerable probability, up to 0.4, that SSI has an adverse effect on the structure and increases the seismic losses.
机译：本文研究了土 - 结构相互作用（SSI）对建筑物地震风险估计的影响。在这种情况下，风险表示由于结构和非结构损伤引起的地震货币损失的概率分布。这里的风险分析揭示了SSI在地震损失中具有有益，有害或不受影措的概率。该分析是针对各种结构系统，故事数量的各种建筑物进行的分析，以及各种土壤类型上的基础尺寸。采用概率的方法来考虑普遍的不确定性来源，即地面运动中的那些，以及土壤结构系统的性质。在这种方法中，采用概率模型来预测建筑物的响应，损坏和维修成本。为了适当地考虑地面运动不确定性，采用在土壤上录制的近7000份加速器仪套件。得出结论，由于SSI，非常柔软的土壤上的结构非常可能会产生较小的损失，这符合SSI对此类系统有利影响的共同信念。但是，适度柔软土壤上建筑物的结果显示出相当大的概率，高达0.4，即SSI对结构产生不利影响并增加了地震损失。

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