NONLINEAR SITE RESPONSE AND ITS EVALUATION AND PREDICTION
NONLINEAR SITE RESPONSE AND ITS EVALUATION AND PREDICTION
复制标题
非线性位点响应及其评估和预测
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
S. Iai
中科院分区：
文献类型：
--
作者：
N. Yoshida;S. Iai
本文讨论了软土地基在强震作用下的非线性特性。首先，简要回顾了土的动力变形特性。然后讨论了非线性分析的方法及其精度。最后介绍了记录强地震动的垂直台阵。利用这些强震数据的研究也进行了审查，以确定发生的非线性行为和解释地面震动。通过回顾，非线性行为被证实发生在这些网站和重要性，考虑到非线性行为在预测网站响应的认识。当最大应变小于0.5%时，等效线性分析是一个很好的近似值，但不适用于液化场地。有效应力分析优于非线性总应力分析，非线性分析优于等效线性分析。
Nonlinear behavior of a soft surface ground during strong earthquakes are reviewed and discussed. Firstly, dynamic deformation characteristics of soil are reviewed briefly. Then method of nonlinear analysis and its accuracy is discussed. Finally, vertical arrays where strong ground motions were recorded are introduced. Researches using these strong motion data are also reviewed to identify the occurrence of the nonlinear behavior and to explain the ground shaking. Through the review, nonlinear behavior is confirmed to occur in these sites and importance to take nonlinear behavior into account in predicting the site response is recognized. Equivalent linear analysis is shown to be a good approximation when maximum strain is less than about 0.5%, but not applicable at a liquefied site. Effective stress analysis is shown to be better than nonlinear total stress analysis, and nonlinear analysis is better than equivalent linear analysis.