Dynamic analysis of masonry arches using Maxwell damping

Dynamic analysis of masonry arches using Maxwell damping
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使用麦克斯韦阻尼的砖石拱动态分析

DOI:
10.1016/j.istruc.2023.01.139
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发表时间:
2023
期刊:
影响因子:
4.1
通讯作者:
Lemos J
Lemos J
中科院分区:
工程技术3区
文献类型:
--
作者:
Lemos J

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马塞诸塞拱门是历史建筑的基本组成部分。这些遗产建筑的地震荷载的脆弱性的评估需要可靠和有效的数值模型。离散单元模型是有限元模型的一种替代方法,在对单元沿着接缝剪切和分离产生的坍塌机制建模时特别有效。离散单元代码通常依赖于动力分析运动方程的显式积分方法,当应用推荐的瑞利阻尼刚度比例分量时,这可能需要大量的运行时间。提出了一种新的方法,使用一种替代的阻尼模型,麦克斯韦阻尼,它涉及到放置多个弹簧阻尼元件的关节,在平行的标准刚度弹簧。该阻尼模型在砌体拱的动力分析中进行了测试,在脉冲和地震荷载下。在这个早期的调查中获得的结果显示出良好的性能,在动态载荷下的崩溃模拟,在一般协议与经典的刚度比例阻尼进行的分析,但显着减少了计算工作量。
Masonry arches are a fundamental component of historical structures. The assessment of the vulnerability of these heritage constructions to seismic loading requires reliable and efficient numerical models. Discrete element models are an alternative to finite element models, being particularly effective in modelling collapse mechanisms created by shearing and separation of the units along the joints. Discrete element codes typically rely on explicit methods of integration of the equations of motion for dynamic analysis, which may require large run times when the recommended stiffness-proportional component of Rayleigh damping is applied. A novel approach is proposed using an alternative damping model, Maxwell damping, which involves placing multiple spring-dashpot elements in the joints, in parallel with the standard stiffness springs. This damping model is tested in the dynamic analysis of masonry arches, under pulse and earthquake loading. The results obtained in this early investigation show a good performance in the simulation of collapse under dynamic loads, in general agreement with the analyses conducted with classical stiffness-proportional damping, but reducing significantly the computational effort.
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发表时间: 2022
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