|Table of Contents|

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

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

Issue:
2025年03期
Page:
92-102
Research Field:
建筑结构
Publishing date:

Info

Title:
Finite element simulation and theoretical analysis of embedded SMA-CFRP composite sheet reinforced RC beams
Author(s):
YU Jie1; 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)
Keywords:
structural reinforcement;  shape memory alloy;  finite element analysis;  carbon fiber sheet;  flexural performance;  reinforced concrete beam
PACS:
TU318
DOI:
10.19815/j.jace.2023.09084
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.

References:

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Last Update: 2025-06-01