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首页> 外文会议>Proceedings of the Fifteenth international conference on civil, structural and environmental engineering computing >Advanced Numerical Strategies for the Analysis of Masonry Vaults in the Non-Linear Range: Two Cases of Damage induced by the 2012 Emilia Romagna Earthquake
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Advanced Numerical Strategies for the Analysis of Masonry Vaults in the Non-Linear Range: Two Cases of Damage induced by the 2012 Emilia Romagna Earthquake

机译：非线性范围内砌体金库分析的高级数值策略：2012年艾米莉亚·罗马涅大地震造成的两起损坏案例

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This paper presents some numerical results obtained with advanced finite element numerical methods applied to the analysis of masonry vaults up to collapse. To be reliable, any procedure adopted should take into account the distinctive aspects of masonry mechanical behavior, namely the low (or zero) tensile strength, the good compressive resistance, high friction coefficient and the importance of the overall geometry for achieving the equilibrium. Classic no-tension material models, whilst relatively simple, disregard the little but not null tensile strength and make the additional simplifying hypothesis of (1) infinitely elastic behavior in compression and (2) isotropy, giving thus the possibility to deal with either semi-analytical approaches (especially for arches) or robust numerical procedures. More advanced models are used in these study cases, for suitably reproducing the little tensile strength with softening, as well as the finite strength in compression (crushing). Two case studies of vaults severely damaged by the recent Emilia Romagna earthquake are analyzed, namely the Giulio Ⅱ 's cross vault placed in the main tower of the fortress of San Felice sul Panaro and the two cross vaults of Torre Fornasini in Poggio Renatico, both severely damaged by the long seismic sequence in May 2012. Alternative standard numerical procedures have been also utilized for comparison purpose. A direct validation of the crack patterns found numerically with those observed during the post-seismic surveys is also possible in the last case.
机译：本文介绍了一些先进的有限元数值方法所获得的数值结果，这些数值方法适用于砌体拱顶坍塌的分析。为可靠起见，采用的任何程序都应考虑到砌体机械性能的独特方面，即低（或零）抗拉强度，良好的抗压性，高摩擦系数以及整体几何形状对达到平衡的重要性。经典的无张力材料模型虽然相对简单，却忽略了很少但不是零的抗张强度，并进一步简化了以下假设：（1）压缩时的无限弹性行为和（2）各向同性，因此有可能处理任一半分析方法（尤其是拱门）或可靠的数值程序。在这些研究案例中使用了更高级的模型，以适当地再现软化时的很小的拉伸强度，以及压缩（压碎）时的有限强度。分析了两个因最近艾米利亚·罗马涅大地震而严重损坏的穹顶的案例研究，分别是放置在圣菲利斯·苏·帕纳罗堡垒要塞主楼上的朱利奥二世的十字架穹顶和波吉奥·雷纳蒂科的两个托雷·福纳西尼十字架穹顶。 2012年5月，地震序列漫长，严重受损。还使用了替代标准数值程序进行比较。在后一种情况下，也可以用地震后调查中观察到的数值直接验证所发现的裂纹模式。

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