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采用碳纤维增强复合材料（CFRP）条带加固的波纹腹板钢梁的抗剪承载力

Shear capacity of corrugated web steel beams strengthened with CFRP strips.

作者信息

El Aghoury Mohamed A, Dyab Alshaymaa K, Ibrahim Sherif M, Saddek Amr B

机构信息

Structural Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt.

Structural Engineering Department, Faculty of Engineering, Beni-Suef University, Beni-Suef, Egypt.

出版信息

Sci Rep. 2024 Dec 16;14(1):30472. doi: 10.1038/s41598-024-76347-4.

DOI:10.1038/s41598-024-76347-4
PMID:39681583
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11649912/
Abstract

In recent years, there has been significant advancement in strengthening techniques for steel structures using carbon-fiber reinforced polymer (CFRP). While numerous studies have focused on CFRP strengthening of steel beams with flat webs, similar investigations on corrugated web steel beams (CWSBs) remain limited despite their increasing application in various steel structures. This study presents numerical and analytical investigations aimed at evaluating the effectiveness of CFRP strengthening for CWSBs and developing a design procedure to predict the shear buckling capacity of strengthened CWSBs. The research employs a finite element (FE) model developed using ANSYS software, validated against previous experimental work by the same authors, which accurately reflects the overall behavior of CWSBs. A parametric study is conducted on 105 CWSBs using the validated FE model to assess the impact of various geometrical parameters, including beam web slenderness ratio, length and thickness of CFRP strips, and different CFRP strip schemes. Results demonstrate that CFRP strengthening can enhance the shear capacity of CWSBs by up to 74.50%. The study identifies the arrangement of CFRP strips on both sides of the web as the most effective parameter for controlling the efficiency of the CFRP strengthening technique. Conversely, changes in CFRP strips up to 70% of web height have minimal effect. A proposed design procedure for predicting the design shear buckling strength of CFRP-strengthened CWSBs shows good consistency with FE model results.

摘要

近年来，在使用碳纤维增强聚合物（CFRP）对钢结构进行加固技术方面取得了重大进展。虽然众多研究聚焦于用CFRP加固平腹钢梁，但对于波纹腹板钢梁（CWSB）的类似研究仍然有限，尽管其在各种钢结构中的应用日益广泛。本研究进行了数值和分析研究，旨在评估CFRP加固CWSB的有效性，并制定一种设计程序来预测加固后CWSB的抗剪屈曲能力。该研究采用了使用ANSYS软件开发的有限元（FE）模型，该模型通过同一作者先前的实验工作进行了验证，能准确反映CWSB的整体性能。使用经过验证的FE模型对105根CWSB进行了参数研究，以评估各种几何参数的影响，包括梁腹板长细比、CFRP条带的长度和厚度以及不同的CFRP条带方案。结果表明，CFRP加固可使CWSB的抗剪能力提高高达74.50%。该研究确定，腹板两侧CFRP条带的布置是控制CFRP加固技术效率的最有效参数。相反，CFRP条带在腹板高度的70%范围内变化时影响最小。提出的预测CFRP加固CWSB设计抗剪屈曲强度的设计程序与FE模型结果显示出良好的一致性。

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