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首页> 外文期刊>Journal of bridge engineering >Blast Load Effects on Highway Bridges. I: Modeling and Blast Load Effects
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Blast Load Effects on Highway Bridges. I: Modeling and Blast Load Effects

机译：爆炸荷载对公路桥梁的影响。 I：建模和爆炸荷载效果

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摘要

Numerous terrorist events during the last decade, including the 2001 attack on the World Trade Center, have heightened concern about the safety of bridges during intentional/unintentional blast load effects. Analysis of highway bridges under blast loads requires accurate generation and application of blast loads and good understanding of the behavior of components of a bridge during high strain rate loading encountered during blast loads. In this paper, a new approach for the application of blast loads on bridge components has been presented. This approach can apply realistic loads and can simulate both reflection and diffraction of blast loads. Using this approach, verification of simulation of blast loads in LS-DYNA has been carried out by using available blast tests on two types of beams. A high fidelity model of a typical three-span highway bridge has been developed for investigation of blast load effects on a three-span reinforced concrete bridge. It is observed that the range of demands imposed on bridge components during blast loads may be significantly higher than those during other extreme hazards, e.g., seismic, for which bridge components may have been designed. Detailed results on various failure modes of this bridge and seismic blast correlations using this model of the bridge are presented in the companion paper.
机译：在过去十年中，包括2001年对世贸中心的袭击在内，发生了许多恐怖事件，这使人们更加担心在有意/无意的爆炸荷载作用下桥梁的安全性。爆炸荷载作用下的公路桥梁分析需要精确生成和应用爆炸荷载，并且需要对爆炸荷载期间遇到的高应变率荷载下桥梁构件的行为有充分的了解。本文提出了一种在桥梁构件上施加爆炸荷载的新方法。这种方法可以施加实际载荷，并且可以模拟爆炸载荷的反射和衍射。使用这种方法，通过对两种类型的梁进行爆破试验，对LS-DYNA中爆炸载荷的仿真进行了验证。已经开发了典型的三跨公路桥梁的高保真模型，以研究三跨钢筋混凝土桥梁的爆炸荷载影响。可以看出，在爆炸载荷期间施加在桥梁部件上的要求范围可能明显高于可能已经针对桥梁部件设计的其他极端危险（例如地震）期间的要求范围。随行文件中提供了有关该桥各种破坏模式的详细结果以及使用该桥模型的地震爆炸相关性的信息。

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  • 来源
    《Journal of bridge engineering》 |2014年第4期|04013023.1-04013023.17|共17页
  • 作者

    Z. Yi; A. K. Agrawal; M. Ettouney; S. Alampalli;

  • 作者单位

    Ammann and Whitney, P. C, 96 Morton St., New York, NY 10014;

    City College of City Univ. of New York, New York, NY 10031;

    Weidlinger Associates, 40 Wall St., New York, NY 10005;

    Structures Evaluation Services Bureau, New York State DOT, 50 Wolf Rd., POD 43, Albany, NY 12232;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Multihazard; Bridge; Blast; Failure mode; Seismic;

    机译：多重危害;桥;爆破;故障模式;地震的;

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