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首页> 外文学位 >ON THE NONLINEAR DYNAMIC RESPONSE OF ARCH DAMS TO EARTHQUAKES - I. FLUID-STRUCTURE INTERACTION: ADDED-MASS COMPUTATIONS FOR INCOMPRESSIBLE FLUID. II. JOINT OPENING NONLINEAR MECHANISM: INTERFACE SMEARED CRACK MODEL.
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ON THE NONLINEAR DYNAMIC RESPONSE OF ARCH DAMS TO EARTHQUAKES - I. FLUID-STRUCTURE INTERACTION: ADDED-MASS COMPUTATIONS FOR INCOMPRESSIBLE FLUID. II. JOINT OPENING NONLINEAR MECHANISM: INTERFACE SMEARED CRACK MODEL.

机译：关于拱坝对地震的非线性动力响应-I.流体-结构相互作用：不可压流体的附加质量计算。二。关节开放非线性机制：界面测裂纹模型。

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摘要

Two topics have been studied with regard to the analysis of nonlinear dynamic response of arch dams to earthquakes.; Part I deals with the dam-reservoir effects considering incompressible fluid. The hydrodynamic effect represented by added-mass matrix is evaluated by two basically different procedures-- a Generalized Westergaard Formula and the Galerkin Finite Element Method. Pressure solutions acting on gravity dams, cylindrical arch dams and general arch dams are compared for the different procedures. Rigorous mode shape and frequency correlations are carried out and based on the results of the correlation studies, a most efficient procedure is suggested, which is shown to be adequate for engineering purpose.; Part II deals with the contraction joint opening behavior. An economical model called the Interface Smeared Crack Model is developed to simulate the joint opening nonlinear mechanism. The model is based on the general smeared crack approach, with a specially introduced "pushing back" operation which is intended to correct the local structure response at element level. This method dramatically reduces the computational cost as compared with a standard joint element analysis. It is demonstrated that it would be beneficial to include the joint opening mechanism in the dynamic analysis of arch dams, because the joint opening will limit the peak tensile arch stresses and thus improve the seismic resistance of the structure.
机译：关于拱坝对地震的非线性动力响应分析，已经研究了两个主题。第一部分讨论考虑不可压缩流体的大坝水库效应。由附加质量矩阵表示的流体动力效应是通过两种基本不同的程序进行评估的-通用Westergaard公式和Galerkin有限元方法。比较了在不同程序下作用于重力坝，圆柱拱坝和普通拱坝的压力解。进行了严格的模态形状和频率相关性，并根据相关性研究的结果，提出了一种最有效的程序，该程序已被证明足以满足工程目的。第二部分介绍了伸缩缝的打开行为。开发了一种经济的模型，称为界面涂污裂纹模型，以模拟接头开口的非线性机制。该模型基于一般的涂抹裂纹方法，并特别引入了“推回”操作，该操作旨在校正单元级别的局部结构响应。与标准的联合元素分析相比，该方法大大降低了计算成本。结果表明，在拱坝的动力分析中包括节理开口机制是有益的，因为节理开口会限制峰值拉伸拱应力，从而提高结构的抗震性。

著录项

  • 作者

    KUO, JAMES SHAW-HAN.;

  • 作者单位

    University of California, Berkeley.;

  • 授予单位 University of California, Berkeley.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 1982
  • 页码 202 p.
  • 总页数 202
  • 原文格式 PDF
  • 正文语种 eng
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