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首页> 外文期刊>Bulletin of earthquake engineering >Evaluation of seismic response of bridges under asynchronous excitation and comparisons with Eurocode 8-2 provisions
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Evaluation of seismic response of bridges under asynchronous excitation and comparisons with Eurocode 8-2 provisions

机译：异步激励下桥梁的地震响应评估以及与欧洲规范8-2的比较

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摘要

The paper aims to evaluate the way Eurocode 8 treats the consideration of asynchronous earthquake ground motion during the seismic design of bridges, and to discuss alternative solutions for cases wherein existing provisions do not lead to satisfactory results. The evaluation of EC8-2 new provisions and simplified methods is performed through comparison with a more refined approach whereas an effort is made to quantitatively assess the relative importance of various design and analysis assumptions that have to be made when spatial variability of ground motion is taken into consideration, based on the study of the dynamic response of 27 different bridges. It is concluded that, despite the complexity of the problem, there are specific cases where EC8 provisions can be safely and easily applied in practice, while in other cases ignoring the effect of asynchronous excitation or performing simplified calculations can significantly underestimate the actual seismic demand.
机译：本文旨在评估Eurocode 8处理桥梁抗震设计过程中对异步地震地面运动的考虑的方式，并讨论针对现有规定未获得令人满意结果的情况的替代解决方案。对EC8-2新规定和简化方法的评估是通过与更完善的方法进行比较来进行的，而努力进行定量评估在考虑地面运动的空间变异性时必须进行的各种设计和分析假设的相对重要性。在研究27种不同桥梁的动力响应的基础上，将其考虑在内。结论是，尽管问题很复杂，但在某些特定情况下，可以在实践中安全，轻松地使用EC8规定，而在其他情况下，忽略异步激励的影响或执行简化的计算则会大大低估实际的地震需求。

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