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首页> 外文期刊>The Structural Design of Tall and Special Buildings >Distribution of strong earthquake input energy in tall buildings equipped with damped outriggers
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Distribution of strong earthquake input energy in tall buildings equipped with damped outriggers

机译：装有阻尼支腿的高层建筑中强地震输入能量的分布

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摘要

The seismic design of optimal damped outrigger structures relies on the assumption that most of the input energy will be absorbed by the dampers, whilst the rest of the structure remains elastic. When subjected to strong earthquakes, nevertheless, the building structure may exhibit plastic hinges before the dampers begin to work. In order to determine to which extent the use of viscously damped outriggers would avoid damage, both the host structure's hysteretic behaviour and the dampers' performance need to be evaluated in parallel. This article provides a parametric study on the factors that influence the distribution of seismic energy in tall buildings equipped with damped outriggers: First, the influence of outrigger's location, damping coefficients, and rigidity ratios core-to-outrigger and core-to-column in the seismic performance of a 60-story building with conventional and with damped outriggers is studied. In parallel, nonlinear behaviour of the outrigger with and without viscous dampers is examined under small, moderate, strong, and severe long-period earthquakes to assess the hysteretic energy distribution through the core and outriggers. The results show that, as the ground motion becomes stronger, viscous dampers effectively reduce the potential of damage in the structure if compared to conventional outriggers. However, the use of dampers cannot entirely prevent damage under critical excitations.
机译：最佳阻尼支腿结构的抗震设计基于以下假设：大部分输入能量将被阻尼器吸收，而结构的其余部分保持弹性。但是，当遭受强烈地震时，在减震器开始工作之前，建筑结构可能会出现塑料铰链。为了确定使用粘性阻尼支腿可避免损坏的程度，主机结构的滞后性能和阻尼器的性能都需要并行评估。本文对影响装有阻尼支腿的高层建筑中地震能量分布的因素进行了参数研究：首先，支腿的位置，阻尼系数和刚度比对支腿和支腿刚度的影响。研究了具有传统悬臂和阻尼悬臂的60层建筑物的抗震性能。同时，在小，中，强和严重的长周期地震下，检查有无粘性阻尼器的支腿的非线性行为，以评估通过岩心和支腿的滞后能量分布。结果表明，与传统的悬臂支架相比，随着地震动的增强，粘性阻尼器可有效减少结构损坏的可能性。但是，阻尼器的使用不能完全防止临界激励下的损坏。

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