Finite element analysis study on the flexural behaviour of steel-concrete composite beams strengthened with prestressed CFRP plates

doi:10.19936/j.cnki.2096-8000.20220728.002

Abstract

Abstract: In order to study the effect of different design parameters on the bending performance of the steel-concrete composite beams strengthened with prestressed CFRP plate and the strength contribution rate of the CFRP plate, finite element analysis is performed based on the experimental work of Wan^[1]. The reliability of the model is verified by the comparisons between the simulation results, experimental results and theoretical results. Based on the finite element model, a parametric study on the flexural behaviour of steel-concrete composite beams strengthened with CFRP plates is conducted. The results show that increasing the length, width, thickness and the prestress level of the CFRP plate, significantly improves the bending performance of strengthened composite beams. Besides, increasing the mono-symmetric ratio of the H-beam and the width-thickness ratio of the web can also improve the bending performance of composite beams. Moreover, the strength contribution rate of the CFRP plate increases with the increase of the length and prestress level of the CFRP plate and the width-thickness ratio of the web, but decreases with the increase of the cross-sectional area of the CFRP plate and the mono-symmetric ratio of H-beam.

Key words: steel-concrete composite beam, strengthening, CFRP, prestressing, flexural performance, finite element analysis, composites

CLC Number:

TB332

GONG Wei-kang, LIU Xiao-yang, JING Yu-cai, XIANG Jun-ning, LI Xiang-guo, YANG Guo-tao. Finite element analysis study on the flexural behaviour of steel-concrete composite beams strengthened with prestressed CFRP plates[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(7): 11-19.

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