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首页> 外文期刊>European Journal of Environmental and Civil Engineering >Characterisation of vibration and damage in masonry structures: experimental and numerical analysis
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Characterisation of vibration and damage in masonry structures: experimental and numerical analysis

机译：砌体结构的振动和损伤特征：实验和数值分析

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摘要

For masonry structures, due to their heterogeneity and the complexity of the interface's behaviour between the blocks and mortar, the discrete element method (DEM) seems to be the best adapted to model this kind of structure, in particular for reproducing complex nonlinear post-elastic behaviour. However, unlike the software using the finite element method, the DEM does not directly obtain the natural frequencies and the mode shapes of the structure via a classic vibrational analysis. On one hand, these dynamic characteristics are needed for the structural design in the case of dynamic loads (seismic, impact). On the other hand, these dynamic characteristics can be useful for the assessment of existing structures by in situ dynamic tests. Therefore, the first objective of this study was to propose a technique that could indirectly identify dynamic characteristics of masonry structures using the DEM. The study began on a simple brick column structure. The sensitivity of the interface parameters following the dynamic characteristics was studied. Then, a masonry arch structure was studied. The technique proposed to identify the dynamic characteristics was validated by comparison with the experimental data. Based on vibrational analysis, the damage to the structure was assessed.
机译：对于砌体结构，由于其异质性以及砌块与砂浆之间的界面行为的复杂性，离散元方法（DEM）似乎最适合于对这种结构进行建模，尤其是用于再现复杂的非线性后弹性行为。但是，与使用有限元方法的软件不同，DEM不能通过经典的振动分析直接获得结构的固有频率和振型。一方面，在动态载荷（地震，冲击）的情况下，结构设计需要这些动态特性。另一方面，这些动态特性可用于通过原位动态测试评估现有结构。因此，本研究的首要目标是提出一种可以使用DEM间接识别砌体结构动力特性的技术。研究始于简单的砖柱结构。研究了遵循动态特性的界面参数的敏感性。然后，研究了砌体拱结构。通过与实验数据进行比较，验证了提出的用于识别动态特性的技术。基于振动分析，评估了对结构的损坏。

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