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碳纤维增强聚合物加固圆形空心截面短柱的静力强度

Static strengths of circular hollow section stub column strengthened with carbon fiber reinforced polymer.

作者信息

Wei Chen, Yang Yang

机构信息

Department of Civil Engineering, Sichuan College of Architectural Technology, Deyang, China.

Department of Mechanical and Information Engineering, Sichuan College of Architectural Technology, Deyang, China.

出版信息

PLoS One. 2025 Aug 1;20(8):e0328047. doi: 10.1371/journal.pone.0328047. eCollection 2025.

DOI:10.1371/journal.pone.0328047
PMID:40749007
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12316273/
Abstract

In previous studies, the strengthening effectiveness and feasibility of carbon fiber reinforced polymer (CFRP) were mainly evaluated through experimental research or numerical analysis. Although these methods can accurately provide estimates, both experimental and numerical assessment processes are costly in terms of time and cost. There is a need for reliable calculation formulae that can predict the static strengths of circular hollow section (CHS) stub columns in a more convenient and cost-saving manner. Therefore, this paper mainly conducted theoretical analysis and derived the calculation formulae. Furthermore, finite element (FE) analysis of CHS stub columns strengthened with CFRP was also conducted, and FE simulations were obtained. The accuracy of these formulae was validated by comparing the theoretical predictions with both FE simulations conducted by the authors and experimental results derived from previous studies. The maximum error was found to be no more than 10%. The cost-effective number of CFRP laminates bonded on the steel tube surface can be determined using the CFRP confinement coefficient λ, where λ balances the construction cost and the strengthening efficiency. A parametric study was also conducted to investigate the impact of steel strength, the number of CFRP laminates, and the bonding configuration of CFRP on the strengthening efficiency.

摘要

在以往的研究中，主要通过实验研究或数值分析来评估碳纤维增强聚合物（CFRP）的增强效果和可行性。虽然这些方法能够准确提供估算结果，但实验和数值评估过程在时间和成本方面都很高昂。因此，需要可靠的计算公式，以便能以更便捷且节省成本的方式预测圆形空心截面（CHS）短柱的静力强度。所以，本文主要进行了理论分析并推导了计算公式。此外，还对采用CFRP增强的CHS短柱进行了有限元（FE）分析，并获得了有限元模拟结果。通过将理论预测结果与作者进行的有限元模拟结果以及以往研究得出的实验结果进行比较，验证了这些公式的准确性。发现最大误差不超过10%。可以使用CFRP约束系数λ来确定粘贴在钢管表面的CFRP层板的经济有效数量，其中λ平衡了建造成本和增强效率。还进行了参数研究，以探讨钢材强度、CFRP层板数量以及CFRP的粘贴配置对增强效率的影响。

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