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Discontinuous approaches for nonlinear dynamic analyses of an ancient masonry tower
Engineering Structures ( IF 5.5 ) Pub Date : 2021-01-03 , DOI: 10.1016/j.engstruct.2020.111626
Angela Ferrante , Dimitri Loverdos , Francesco Clementi , Gabriele Milani , Antonio Formisano , Stefano Lenci , Vasilis Sarhosis

The aim of this paper is to present the development of discontinuous approaches to simulate the nonlinear dynamic behaviour of the civic clock tower of Rotella, in the province of Ascoli Piceno (Italy). The study involves the use of the Non-Smooth Contact Dynamics method implemented in the LMGC90© code, where sliding motions are governed by Signorini's impenetrability condition and dry-friction Coulomb's law, and the Discrete Element Method with cohesive and tensional behaviours at the joints in the 3DEC© code. The tower was represented using three different geometric models ranged from the most complex one, including the full geometry and multi-leaf masonry walls, to the simplest one, including the single-leaf walls as a simplification of the real masonry. The numerical results highlighted the modes of failure depending on the shape, size and texture of the masonry and the modalities of progressive damage under dynamic actions. Moreover, both numerical approaches have proven to be capable of simulating large displacements and complete block separations, reproducing complex mechanical behaviours and making predictions on the vulnerability assessment of the historical masonry buildings.



中文翻译:

间断法进行古砌体塔非线性动力分析

本文的目的是介绍不连续方法的发展,以模拟位于意大利阿斯科利皮切诺省的罗特拉(Rotella)市民钟楼的非线性动力学行为。这项研究涉及使用在LMGC90©代码中实现的非光滑接触动力学方法,其中滑动运动受Signorini的不可渗透性条件和干摩擦库仑定律控制,以及离散元素方法在具有约束力的情况下具有粘结和拉伸行为。 3DEC©代码。该塔使用三种不同的几何模型表示,从最复杂的模型(包括完整的几何结构和多叶砌体墙)到最简单的模型(包括单叶墙),以简化真实的砌体。数值结果强调了取决于形状的破坏模式,砌体的大小和质地以及动态作用下渐进式破坏的形式。此外,两种数值方法均已被证明能够模拟大位移和完整的砌块分离,再现复杂的机械性能以及对历史砌体建筑的脆弱性评估做出预测。

更新日期:2021-01-04
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