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Predictions of the inelastic seismic response of concrete structures including shear deformations and anchorage slip.

机译：对混凝土结构非弹性地震响应的预测，包括剪切变形和锚固滑移。

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摘要

The behavior of reinforced concrete frame structures under seismic loads is analyzed using a number of mathematical models of increasing levels of complexity. The first model, represented by the program DRAIN-2DX, idealizes plasticity in members as concentrated at the member ends and governed by a simple elastoplastic hysteretic rule with no strength or stiffness degradation. The second model, implemented in program IDARC2D, permits yield penetration into the member and accounts for stiffness and strength degradation as well as pinching of the hysteresis loops. The last model is based on a fiber formulation and is implemented in the program F sc IBERC.;Several large-scale member and frame laboratory specimens are analyzed with the three models under static and dynamic loading. It was found that in general the beam-column element of program DRAIN-2DX does not reproduce well the member behavior, particularly in terms of stiffness and energy dissipation. In contrast, program IDARC2D generally provides a good estimate of member and frame behavior, including pinching of the hysteresis loops, thanks to a set of parameters used to adjust the predicted response. Finally, program F sc IBERC simulates closely the member response when it is governed primarily by flexure and axial forces. It does not, however, provide good predictions when pinching of the hysteresis loops occurs.;To extend and improve the performance of the fiber element model implemented in program F sc IBERC, a simple model that accounts for the effects of shear deformations is added. Such a model is based on a truss analogy of the cracked structural members. A series of runs using some of the members and frames studied previously is performed to assess the validity of the model as well as its influence on the predicted response.;Additionally, a model that estimates the effects of anchorage slip on member deformation and stiffness is introduced into the program. Again, a series of runs is performed on the same specimens to evaluate the effectiveness of the model as well as the impact on the computed response.
机译：使用许多复杂程度不断提高的数学模型来分析钢筋混凝土框架结构在地震荷载下的性能。第一个模型由程序DRAIN-2DX表示，它使构件的可塑性理想化，即集中在构件端部，并受简单的弹塑性滞后规则控制，而强度或刚度不会降低。在程序IDARC2D中实现的第二个模型允许屈服穿透到构件中，并考虑到刚度和强度降低以及磁滞回线的收缩。最后一个模型基于纤维配方，并在F sc IBERC程序中实现。在静态和动态载荷下，使用这三个模型分析了几个大型成员和框架实验室标本。已经发现，通常程序DRAIN-2DX的梁柱单元不能很好地再现构件的行为，特别是在刚度和能量耗散方面。相比之下，由于使用了一组用于调整预测响应的参数，程序IDARC2D通常可以很好地估计成员和框架的行为，包括收缩磁滞回线。最后，程序F sc IBERC在主要受弯曲力和轴向力支配的情况下，紧密模拟构件的响应。但是，当发生滞回环收缩时，它不能提供良好的预测。；为了扩展和改善程序F sc IBERC中实现的纤维元件模型的性能，添加了一个考虑剪切变形影响的简单模型。这样的模型基于破裂结构构件的桁架类比。使用先前研究的一些构件和框架进行了一系列的运行，以评估模型的有效性及其对预测响应的影响。此外，一个用于评估锚固滑移对构件变形和刚度影响的模型是引入程序。同样，在相同的样本上执行了一系列运行，以评估模型的有效性以及对计算响应的影响。

著录项

  • 作者

    Rubiano-Benavides, Nestor Roberto.;

  • 作者单位

    The University of Texas at Austin.;

  • 授予单位 The University of Texas at Austin.;
  • 学科 Civil engineering.;Mechanics.;Mechanical engineering.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 193 p.
  • 总页数 193
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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