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钢及钢-混凝土组合梁中正弦腹板稳定性的有限元分析

Finite Element Analysis of the Stability of a Sinusoidal Web in Steel and Composite Steel‑Concrete Girders.

作者信息

Śledziewski Krzysztof, Górecki Marcin

机构信息

Faculty of Civil Engineering and Architecture, Lublin University of Technology, Nadbystrzycka 40 Str., 20‑618 Lublin, Poland.

出版信息

Materials (Basel). 2020 Feb 26;13(5):1041. doi: 10.3390/ma13051041.

DOI:10.3390/ma13051041
PMID:32110857
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7085196/
Abstract

This paper presents the results of numerical investigations into the behavior of a sinusoidal web loaded in shear due to buckling in the period from the onset of buckling until failure, as well as the impact of a reinforced concrete slab on the stability of the web. The analysis concerned steel girders and composite girders with the top flange bonded to a reinforced concrete slab. Nonlinear analyses were performed using the finite element method. The results of the investigations support the conclusion that the appearance and propagation of shear stresses in the sinusoidal web of the composite steel-concrete beam are the same as those in an identical non‑composite steel beam, but the bracing of the top flanges improves the shear strength and, at the same time, affects the location of initial stresses. In addition, it was found that, despite the three types of buckling, the predominant failure of the sinusoidal webs, regardless of the presence of the concrete slab, is global buckling. It occurs diagonally through several folds at the same time, including deformation of the web over its entire height.

摘要

本文介绍了对正弦腹板在剪切作用下从屈曲开始到破坏期间的行为进行数值研究的结果，以及钢筋混凝土板对腹板稳定性的影响。分析涉及顶部翼缘与钢筋混凝土板粘结的钢梁和组合梁。使用有限元方法进行了非线性分析。研究结果支持以下结论：钢 - 混凝土组合梁正弦腹板中剪应力的出现和传播与相同的非组合钢梁中的情况相同，但顶部翼缘的支撑提高了抗剪强度，同时影响初始应力的位置。此外，研究发现，尽管存在三种屈曲类型，但无论混凝土板是否存在，正弦腹板的主要破坏形式都是整体屈曲。它同时以对角线方式穿过几个褶皱，包括腹板在其整个高度上的变形。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/75b9/7085196/acb641dc5d66/materials-13-01041-g018.jpg
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