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A fibre beam-based approach for the evaluation of the seismic capacity of masonry arches

机译:基于纤维束的砌体拱抗震能力评估方法

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The paper proposes the use of a fibre beam-based methodology to study the dynamic behaviour of masonry arches and arch bridges. The approach, previously used for load-carrying capacity assessment, allows for a detailed description of both the nonlinear material properties and the seismic action, with reasonable computational effort. As a first step, in order to validate the proposed method, the failure condition under acceleration pulse is analysed, and the results are compared with the solution provided by the mechanism method for different geometric configurations. The influence of material behaviour is also investigated. The seismic capacity of masonry arches is then assessed through pushover analyses under different load distributions and IDAs under natural accelerograms to identify a suitable representation of inertial forces arising under earthquake ground motion. Finally, the in-plane seismic capacity of an existing seven-span masonry arch bridge is evaluated.
机译:本文提出使用基于纤维束的方法来研究砌体拱和拱桥的动力特性。以前用于承载能力评估的方法可以通过合理的计算工作来详细描述非线性材料特性和地震作用。首先,为了验证所提出的方法,分析了加速脉冲下的失效条件,并将结果与​​机理方法针对不同几何构造提供的解决方案进行了比较。还研究了材料行为的影响。然后,通过在不同载荷分布下的推覆分析和在自然加速度下的IDA,通过推覆分析来评估砌体拱的抗震能力,从而确定地震地震动下产生的惯性力的合适表示。最后,评估了现有的七跨砌体拱桥的面内抗震能力。

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