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首页> 外文期刊>Bulletin of earthquake engineering >Displacement capacity of masonry piers: parametric numerical analyses versus international building codes
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Displacement capacity of masonry piers: parametric numerical analyses versus international building codes

机译：砌体墩的位移能力：参数数值分析与国际建筑规范

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The nonlinear behaviour of masonry piers loaded in their plane is investigated by parametric numerical simulations. Each pier has a cantilever scheme, is loaded by a constant axial load and is subjected to an increasing horizontal displacement at the top. The macro-modelling approach is used to perform numerical analyses, adopting two different constitutive laws: a total strain crack model and a plastic model. The numerical model is calibrated on a block-masonry type for which experimental tests are available in literature. Parametric numerical simulations are performed by varying the aspect-ratio and the compression level, in order to assess the influence of such parameters on both shear strength and displacement capacity. By comparing numerical results with formulas of international codes, a good agreement for the shear strength is obtained, while significant differences are observed for the displacement capacity, which is influenced by both parameters. The authors propose a simple empirical formula for the displacement capacity, obtained by fitting the numerical results. The expression can be useful in the practical design for considering the influence of aspect-ratio and compression level, currently neglected by building codes.
机译：通过参数数值模拟研究了砌体墩在其平面上的非线性行为。每个墩都有一个悬臂方案，承受恒定的轴向载荷，并在顶部承受增加的水平位移。宏建模方法用于进行数值分析，采用两种不同的本构定律：总应变裂纹模型和塑性模型。数值模型是在砌体砌体类型上校准的，文献中提供了有关试验的信息。通过评估长宽比和压缩级别进行参数数值模拟，以便评估此类参数对剪切强度和位移能力的影响。通过将数值结果与国际规范公式进行比较，可以得出抗剪强度的良好一致性，而位移容量存在显着差异，这受两个参数的影响。作者提出了通过拟合数值结果获得的位移容量的简单经验公式。该表达式在实际设计中对于考虑纵横比和压缩级别的影响可能是有用的，而当前建筑法规已忽略了这种影响。

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