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一、前言 本文评述堆石坝抗强震设计的理论分析方法及其有关问题,可以作为1985年第二届土动力学和地震工程国际会议上所提评论文章及在相应杂志上发表的论文的续篇。在那篇文章里通过全面综述大量已发表的坝的反应分析方法后,着重讨论了以下几方面的影响:(1)与围压有关的材料刚度的非均匀性;(2)三维河谷的几何形状;(3)材料的非线性与非弹性特性。本文在斜入射平面SH波在坝与河谷界面上引起的不均匀激振影响的少量三维解方面有新的进展。此外,本文还通过总结,给出了均匀激振(刚性坝基)下有关非弹性反应和三维河谷影响的背景材料。
I. Preface This paper reviews the theoretical analysis methods and related issues of anti-strong earthquake design of rockfill dam and can be used as the commentary article published in the second International Conference on Soil Dynamic Engineering and Seismic Engineering in 1985 and the papers published in the corresponding magazines Continued articles. In that article, a comprehensive review of a large number of published dam response analyzes focuses on the following aspects: (1) inhomogeneity of material stiffness in relation to confining pressures; (2) geometry of the 3D valley Shape; (3) non-linear and non-elastic properties of the material. In this paper, new progress has been made in the small three-dimensional solution of the non-uniform excitation induced by obliquely incident SH wave at the dam-valley interface. In addition, the paper also summarizes the background material about the inelastic response and 3D river valley under uniform excitation (rigid dam foundation).