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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Seismic performance of buildings with structural and foundation rocking in centrifuge testing
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Seismic performance of buildings with structural and foundation rocking in centrifuge testing

机译：离心测试中具有结构和基础摇摆的建筑物的抗震性能

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摘要

Rocking motion, established in either the superstructure in the form of a 2-point stepping mechanism (structural rocking) or resulting from rotational motion of the foundation on the soil (foundation rocking), is considered an effective, low-cost base isolation technique. This paper unifies for the first time the 2 types of rocking motion under a common experimental campaign, so that on the one hand, structural rocking can be examined under the influence of soil and on the other, foundation rocking can be examined under the influence of a linear elastic superstructure. Two building models, designed to rock above or below their foundation level so that they can reproduce structural and foundation rocking respectively, were tested side by side in a centrifuge. The models were placed on a dry sandbed and subjected to a sequence of earthquake motions. The range of rocking amplitude that is required for base isolation was quantified. Overall, it is shown that the relative density of sand does not influence structural rocking, while for foundation rocking, the change from dense to loose sand can affect the time-frequency response significantly and lead to a more predictable behaviour.
机译：在上层建筑中以两点步进机制的形式建立的摇摆运动（结构摇摆），或者是由基础在土壤上的旋转运动引起的摇摆（基础摇摆），被认为是一种有效的低成本基础隔离技术。本文首次将两种类型的摇摆运动统一在一个共同的实验活动下进行，因此，一方面可以在土壤的影响下检查结构摇摆，另一方面，可以在土壤的影响下检查基础摇摆。线性弹性上部结构。在离心机中并排测试了两种建筑模型，这些模型设计成可在其基础水平之上或之下摇摆，以便它们分别可再现结构和基础摇摆。将模型放置在干燥的沙床上，并进行一系列地震运动。量化了基本隔离所需的摇摆幅度范围。总的来说，表明砂的相对密度不影响结构的摇摆，而对于基础摇摆，从致密的砂到松散的砂的变化可以显着影响时频响应并导致更可预测的行为。

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