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Direct displacement-based design: A seismic design methodology and its application to concrete bridges.

机译：基于直接位移的设计：抗震设计方法及其在混凝土桥梁中的应用。

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摘要

This dissertation describes the formulation of an alternative seismic design methodology known as Direct Displacement-Based Design. The design procedure is based on the realization that displacement is of paramount importance in earthquake engineering, and that current procedures, which are based on forces, check displacement rather than design directly for it. By basing design on displacement, we obtain structures that are designed for uniform levels of risk as displacement is an excellent indicator of damage. Additionally, the displacement-based design approach considers inelastic behavior directly, which is in contrast to current force-based procedures thus resulting in more dependable estimations of response during larger earthquakes.; The research described first considers the design of single degree of freedom systems such as single column bridges. This is then followed by analytical as well as experimental verification of the direct displacement-based design procedure. Experimental verification was obtained through the use of dynamic shake table testing of two-column reinforced concrete bridge supports. The last portion of this research describes how the procedure is applied for more complex multiple degree of freedom systems such as multispan bridges. Analytical verification was obtained through the use of dynamic inelastic time history analysis.; Based on the results presented in this dissertation, it is concluded that for the classes of structures considered, direct displacement-based design provides a comprehensive design approach whereby a bridge structure achieves defined performance levels across a wide range of earthquake intensity.
机译：本文介绍了一种称为直接位移基设计的抗震设计方法。设计过程是基于以下认识：位移在地震工程中至关重要，而当前基于力的过程会检查位移，而不是直接为其设计位移。通过基于位移的设计，我们可以将结构设计为具有统一的风险等级，因为位移是损坏的极佳指标。此外，基于位移的设计方法直接考虑了非弹性行为，这与当前基于力的过程相反，因此导致在较大地震期间响应的估计更加可靠。首先描述的研究考虑了单自由度系统的设计，例如单列桥。然后是基于位移的直接设计过程的分析和实验验证。通过使用两柱式钢筋混凝土桥梁支架的动态振动台测试获得了实验验证。本研究的最后一部分描述了该程序如何应用于更复杂的多自由度系统（如多跨桥）。通过使用动态非弹性时程分析获得分析验证。根据本文提出的结果，可以得出结论，对于所考虑的结构类别，基于直接位移的设计提供了一种全面的设计方法，通过这种方法，桥梁结构可以在广泛的地震烈度范围内达到规定的性能水平。

著录项

  • 作者

    Kowalsky, Mervyn Jose.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Engineering Civil.; Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 441 p.
  • 总页数 441
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;机械、仪表工业;
  • 关键词

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