Earthquake input energy to tall and base‐isolated buildings in time and frequency dual domains
Earthquake input energy to tall and base‐isolated buildings in time and frequency dual domains
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DOI：
10.1002/tal.497
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发表时间：
2009-10
期刊：
影响因子：
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通讯作者：
I. Takewaki;K. Fujita
中科院分区：
文献类型：
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作者：
I. Takewaki;K. Fujita
高层和基础隔震建筑的地震输入能量通过时域和频域方法进行了检查。这两种方法相互支持了地震输入能量估算的有效性。结果表明，这两种方法各有优势，可以相互弥补。时域方法历史悠久，也适用于非线性模型，而频域方法以能量传递函数为特征，其等面积特性在讨论地震输入能量的稳定性时起着重要作用。这种等面积性质只能在简单模型中由留数定理导出。还证明了多自由度模型中的这种等面积特性可以通过时域方法导出，用于具有恒定傅立叶振幅谱的输入运动的理想化模型。这种想法适用于高层和基础隔震建筑。能量传递函数的等面积性质提供了输入能量的稳定特性，只要建筑物的总质量不变。版权所有© 2008约翰威利父子有限公司。
Earthquake input energies to tall and base‐isolated buildings are examined by both time‐domain and frequency‐domain methods. Both methods support the validity of evaluating the earthquake input energy each other. It is shown that both methods have different advantages and can compensate for each other. While the time‐domain method has a long history and is applicable to nonlinear models as well, the frequency‐domain method is characterized by the energy transfer function and its equi‐area property plays an important role in the discussion of the stability of earthquake input energy. This equi‐area property can be derived by the residue theorem only in a simple model. It is also demonstrated that this equi‐area property in multi‐degree‐of‐freedom models can be derived by the time‐domain method for an idealized model of input motions with a constant Fourier amplitude spectrum. This idea is applied to tall and base‐isolated buildings. The equi‐area property of the energy transfer function provides a stable characteristic on the input energy as far as the total mass of the buildings is constant. Copyright © 2008 John Wiley & Sons, Ltd.