考虑水动力效应的混凝土重力坝地震响应

Aouadj Linda, A. Kadid
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引用次数: 0

摘要

摘要在考虑水动力相互作用的情况下,采用动力分析方法研究了坝高和流体可压缩性对混凝土坝重力响应的影响。利用ADINA有限元软件对空储层和满储层进行了分析,并考虑了几种模型。在第一个模型中,流体的质量通过韦斯特加德附加质量的概念来考虑,在第二个模型中;声波流体单元用于模拟水对储层的影响。坝体高度是影响重力坝地震反应的主要因素之一;因为根据静态和动态分析得出的自然周期、位移和应力,高度的变化提供了不同的响应。数值计算结果表明,坝库相互作用对重力坝动力响应的精确估计起着重要作用。水库的动水压力增加了坝体的应力和坝顶的水平位移。将不可压缩水模型(Westergaard)与可压缩水模型的地震响应进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seismic Response of Concrete Gravity Dams Considering Hydrodynamic Effects
Abstract This paper presents a dynamic analytical study to assess the effect of dam height as well as fluid compressibility on the gravity response of a concrete dam, considering the effects of hydrodynamic interaction. The analysis is carried out using the ADINA Finite Element software for empty and full reservoir conditions by considering several models. In the first model, the mass of fluid is taken into account by the concept of Westergaard added mass, in the second model; an acoustic fluid element is used to simulate the effect of water on the reservoir. The height of the dam is one of the main factors affecting the seismic response of gravity dams; because the change in height provides different responses depending on the natural periods, displacements and stresses obtained from static and dynamic analyses. The numerical results showed that the effect of interaction between the dam and the reservoir plays an important role in the precise estimation of the dynamic response of gravity dams. The hydrodynamic water pressure from the reservoir increases stresses in the dam body and horizontal displacements at the crest. The seismic response obtained by the incompressible water model (Westergaard) is compared with that of the compressible water model.
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