A Mathematical Representation of Near-Fault Ground Motions
A Mathematical Representation of Near-Fault Ground Motions
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DOI：
10.1785/0120020100
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发表时间：
2003-06
影响因子：
3
通讯作者：
G. Mavroeidis;A. Papageorgiou
中科院分区：
文献类型：
--
作者：
G. Mavroeidis;A. Papageorgiou
本文提出了一个简单而有效的近场强地震动分析模型。该模型定性和定量地描述了近断层地震动的脉冲特性。此外，它还可用于分析重现基于现有近源记录的经验观测。模型的输入参数具有明确的物理意义。建议的分析模型已被校准使用大量的实际近场地面运动记录。它成功地模拟了整个可用的近断层位移，速度和（在许多情况下）加速度的时间历程，以及相应的变形，速度和加速度反应谱。此外，一个非常简化的方法来产生现实的合成地面运动，是足够的工程分析和设计的概述和应用。最后，应该指出的是，本工作中提出的分析模型（沿着其参数的比例律）有可能促进常规、非常规（例如，基础隔离的），以及特殊结构（例如，悬索桥、流体储罐）受到近源地震激励，作为模型输入参数的函数，因此，最终作为地震大小的函数。
A simple, yet effective, analytical model is proposed for the representation of near-field strong ground motions. The model adequately describes the impulsive character of near-fault ground motions both qualitatively and quantitatively. In addition, it can be used to analytically reproduce empirical observations that are based on available near-source records. The input parameters of the model have an unambiguous physical meaning. The proposed analytical model has been calibrated using a large number of actual near-field ground-motion records. It successfully simulates the entire set of available near-fault displacement, velocity, and (in many cases) acceleration time histories, as well as the corresponding deformation, velocity, and acceleration response spectra. Furthermore, a very simplified methodology for generating realistic synthetic ground motions that are adequate for engineering analysis and design is outlined and applied. Finally, it should be noted that the analytical model (along with the scaling laws of its parameters) proposed in the present work has the potential to facilitate the study of the elastic and inelastic response of conventional, nonconventional (e.g., base-isolated), and special structures (e.g., suspension bridges, fluid-storage tanks) subjected to near-source seismic excitations as a function of the model input parameters and thus, ultimately, as a function of earthquake size.