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首页> 外文期刊>Bulletin of earthquake engineering >Nonlinear seismic response analysis of arch dam-foundation systems - part I dam-foundation rock interaction
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Nonlinear seismic response analysis of arch dam-foundation systems - part I dam-foundation rock interaction

机译：拱坝基础系统的非线性地震反应分析-第一部分坝基础岩石相互作用

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摘要

The arch dam-foundation rock dynamic interaction and the nonlinear opening and closing effects of contact joints on arch dam are important to the seismic response analysis of arch dams. Up to date, there is not yet a reasonable and rigorous procedure including the two factors in seismic response analysis. The methods for the analysis of arch dam-foundation rock dynamic interaction in frequency domain are not suitable to the problem with nonlinear behaviors, in this paper, so an analysis method in time domain is proposed by combining the explicit finite element method and the transmitting boundary, and the dynamic relaxation technique is adopted to obtain the initial static response for dynamic analysis. Moreover, the influence of arch dam-foundation dynamic interaction with energy dispersion on seismic response of designed Xiaowan arch dam in China is studied by comparing the results of the proposed method and the conventional method with the massless foundation, and the local material nonlinear and nonhomogeneous behaviors of foundation rock are also considered. The reservoir water effect is assumed as Westergaard added mass model in calculation. The influence of the closing-opening effects of contact joints of arch dam on the seismic response will be studied in another paper.
机译：拱坝-基础岩石动力相互作用以及接触缝对拱坝的非线性打开和闭合作用对拱坝的地震反应分析具有重要意义。迄今为止，还没有一个合理而严格的程序，包括地震响应分析中的两个因素。本文针对拱坝-基础岩石动力相互作用的频域分析方法不适用于非线性行为问题，因此，结合显式有限元法和透射边界，提出了一种时域分析方法。 ，并采用动态松弛技术获得初始静态响应以进行动态分析。此外，通过将拟议方法和常规方法与无质量基础，局部材料非线性和非均质性的结果进行比较，研究了拱坝-地基动力相互作用与能量扩散对设计的小湾拱坝地震响应的影响。还考虑了基础岩石的行为。计算中假设水库水效应为Westergaard附加质量模型。在另一篇论文中，将研究拱坝接触缝的闭合打开效应对地震响应的影响。

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