Critical Earthquake Loads for SDOF Inelastic Structures Considering Evolution of Seismic Waves
Critical Earthquake Loads for SDOF Inelastic Structures Considering Evolution of Seismic Waves
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DOI：
10.1007/978-1-4471-4144-0_10
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发表时间：
2010-06
影响因子：
1.5
通讯作者：
I. Takewaki;A. Moustafa;K. Fujita
中科院分区：
文献类型：
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作者：
I. Takewaki;A. Moustafa;K. Fujita
地震地震动引起的结构破坏主要取决于三个参数：(1)震源特性和地震动的特征（震级、震中距离、持续时间、频率含量、振幅和当地土壤类型），(2)结构特性（固有频率、模态振型、阻尼特性、建筑材料、结构系统和延性能力），以及(3)结构的基本固有频率与地震动的主导频率的接近程度。2011年太平洋沿岸的东北地震清楚地证明了这些事实。一般来说，地震动特性具有较大的固有不确定性，无法控制，而结构特性的变异性较小，一般可以在一定程度上进行管理。例如，可以选择结构材料和构件，通过构件细部设计提高结构的抗震性能，从而提高延性。
The damage of structures induced by earthquake ground motions depends primarily on three parameters: (1) the characteristics of earthquake source properties and ground motions (magnitude, epicentral distance, duration, frequency content, amplitude and local soil type), (2) the properties of the structure (natural frequencies, mode shapes, damping properties, material of construction, structural system and ductility capacity), and (3) how close the structure’s fundamental natural frequency to the dominant frequency of the ground motion. The 2011 off the Pacific coast of Tohoku earthquake has demonstrated these facts clearly. In general, the ground motion characteristics involve large inherent uncertainties and cannot be controlled while the structure’s properties have smaller variability and can be managed to some extent in general. For instance, the material and members of construction can be selected and the seismic-resistance of the structure can be improved to fairly high levels through member detailing for enhancement of ductility capacity.