填土砌石桥梁的壳壳有限元

IF 0.6 Q3 ENGINEERING, MULTIDISCIPLINARY

Acta Polytechnica Pub Date : 2022-05-05 DOI:10.14311/ap.2022.62.0293

P. Řeřicha

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引用次数: 0

摘要

石砌体桥梁由于其特殊的非均质结构，难以用商业有限元软件进行分析。石拱最好被模拟成一个厚壳，那里有预定的张力破坏方向，与床缝正常。开发了一个专用的、非常简单的Mindlin壳有限元，每个节点有五个平移自由度。它的特点是与充填体的线性等参数或恒应变单元兼容。大多数桥梁都可以在假定平面应变条件下以足够的精度进行分析。然后将单元简化为每个节点具有三个平移自由度的Timoshenko梁单元。介绍了后一种方法在ponikl大桥上的应用。

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A mindlin shell finite element for stone masonry bridges with backfill

Stone masonry bridges are difficult to analyse with commercial finite element (FE) packages for their specific heterogeneous composition. The stone arch is best modelled as a thick shell where there are predestined directions of tension failure, normal to the bed joints. A dedicated, very simple, Mindlin shell finite element is developed with five translational degrees of freedom per node. It features compatibility with linear isoparametric or constant strain elements for the backfill. Most bridges can be analysed with a sufficient accuracy assuming plain strain conditions. The element then simplifies to a Timoshenko beam element with three translational degrees of freedom per node. An application of the latter one to the bridge at Poniklá is presented.

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来源期刊

Acta Polytechnica ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.90

自引率

12.50%

发文量

审稿时长

24 weeks

期刊介绍： Acta Polytechnica is a scientific journal published by CTU in Prague. The main title, Acta Polytechnica, is accompanied by the subtitle Journal of Advanced Engineering, which defines the scope of the journal more precisely - Acta Polytechnica covers a wide spectrum of engineering topics, physics and mathematics. Our aim is to be a high-quality multi-disciplinary journal publishing the results of basic research and also applied research. We place emphasis on the quality of all published papers. The journal should also serve as a bridge between basic research in natural sciences and applied research in all technical disciplines. The innovative research results published by young researchers or by postdoctoral fellows, and also the high-quality papers by researchers from the international scientific community, reflect the good position of CTU in the World University Rankings. We hope that you will ﬁnd our journal interesting, and that it will serve as a valuable source of scientiﬁc information.