A mindlin shell finite element for stone masonry bridges with backfill

IF 0.6 Q3 ENGINEERING, MULTIDISCIPLINARY

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

P. Řeřicha

引用次数: 0

Abstract

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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填土砌石桥梁的壳壳有限元

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。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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

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