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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

42卷

期数:

2025年03期

页码:

92-102

栏目:

建筑结构

出版日期:

2025-05-30

文章信息/Info

Title:

Finite element simulation and theoretical analysis of embedded SMA-CFRP composite sheet reinforced RC beams

文章编号:

1673-2049(2025)03-0092-11

作者:

余 洁^1,2,3,陈星宇¹,王宇航²,余 周³,沈琪雯³,薛尚铃³

(1. 重庆科技大学 土木与水利工程学院,重庆 401331; 2. 重庆大学 土木工程学院,重庆 400045; 3. 中冶赛迪集团有限公司,重庆 400013)

Author(s):

YU Jie^1,2,3, CHEN Xingyu¹, WANG Yuhang², YU Zhou³, SHEN Qiwen³, XUE Shangling³

(1. School of Civil and Hydraulic Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 3. CISDI Group Co., Ltd., Chongqing 400013, China)

关键词:

结构加固;  形状记忆合金;  有限元分析;  碳纤维板材;  抗弯性能;  钢筋混凝土梁

Keywords:

structural reinforcement;  shape memory alloy;  finite element analysis;  carbon fiber sheet;  flexural performance;  reinforced concrete beam

分类号:

TU318

DOI:

10.19815/j.jace.2023.09084

文献标志码:

A

摘要:

为研究碳纤维复合材料(CFRP)与形状记忆合金(SMA)采用内嵌(NSM)和外贴(EB)等不同加固方式组合加固钢筋混凝土(RC)梁后的抗弯性能,通过有限元软件ABAQUS创建有效的SMA以及CFRP加固RC梁模型,对其加固性能进行分析,研究了不同SMA直径与数量对钢筋混凝土梁加固效果的响应; 建立了嵌入式SMA加固RC梁的有限元模型,并基于有限元模拟结果推导加固梁的抗弯承载力计算公式。结果表明:提升SMA直径对试验梁加固效果有积极影响,加固梁开裂荷载提升了33%～133%,极限承载力提升了8%～31%; 嵌入式SMA-CFRP复合板材加固梁能很大程度提升加固效果,极限承载力提升了92.7%,开裂荷载增长31.9%,屈服荷载增长33.3%; 与外贴加固相比,嵌入式复合板材可以有效延缓端部剥离破坏,使加固材料充分发挥强度; 提出的组合加固梁抗弯承载力计算公式的理论计算结果与有限元模型结果吻合良好,可为后续相关研究提供参考。

Abstract:

In order to investigate the flexural performance of reinforced concrete(RC)beams strengthened with carbon fiber-reinforced polymer(CFRP)and shape memory alloy(SMA)using different strengthening methods, including near-surface mounted(NSM)and externally bonded(EB)techniques, finite element models of SMA- and CFRP-strengthened RC beams were established using ABAQUS software to analyze their strengthening performance. The effects of SMA diameter and quantity on the strengthening effectiveness of RC beams were systematically studied. A finite element model for RC beams strengthened with embedded SMA was developed, and a formula for calculating the flexural bearing capacity of strengthened beams was derived based on simulation results. The results show that increasing the SMA diameter positively influences the strengthening effect. The cracking load of strengthened beams are increased by 33%-133%, and the ultimate bearing capacity are improved by 8%-31%. The combined use of embedded SMA-CFRP composite plates significantly enhance the strengthening performance, achieving a 92.7% increase in ultimate bearing capacity, a 31.9% growth in cracking load, and a 33.3% improvement in yield load. Compared to externally bonded reinforcement, embedded composite plates effectively delay end debonding failure, allowing full utilization of the material strength. The theoretical calculation results of the proposed flexural bearing capacity calculation formula of composite strengthened beams are in good agreement with finite element simulation results, which can provide reference for subsequent related research.

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相似文献/References:

[1]欧进萍,匡亚川.形状记忆合金增强弹性混凝土梁的变形特征[J].建筑科学与工程学报,2007,24(03):1.
　OU Jin-ping,KUANG Ya-chuan.Deformation Characteristic of Concrete Beams Embedded Superelastic Shape Memory Alloy[J].Journal of Architecture and Civil Engineering,2007,24(03):1.

备注/Memo

备注/Memo:

收稿日期:2023-09-05
基金项目:国家自然科学基金青年科学基金项目(52108117); 重庆市自然科学基金项目(CSTB2022NSCQ-MSX1242);
重庆市博士后研究项目特别资助项目(2021XM3045); 重庆高新区科技创新局揭榜挂帅项目(2022)
作者简介:余 洁(1993-),女,工学博士,副教授,E-mail:cquyujie@sina.com。
Author resume: YU Jie(1993-), female, PhD, associate professor, E-mail: cquyujie@sina.com.

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更新日期/Last Update: 2025-06-01