Analysis of Acoustic Emission Parameters of GFRP Tube Confined Steel Fiber Reinforced Concrete Short Columns
SHE Yanhua
HUANG Junjie
ZHOU Lingjie
Abstract：To investigate the influence of steel fiber content on the mechanical properties of glass fiber reinforced polymer(GFRP)tube confined steel fiber reinforced concrete(SFRC)short columns under axial compression,acoustic emission(AE)technology was employed to monitor the damage evolution of the core concretes.The results show that as the steel fiber content increases from 0%to 1.8%,the peak load and displacement ductility of specimens increase,with the maximum increments reaching 31.55%and 15.60%respectively.The axial compression process of the specimens can be divided into three distinct stages based on AE energy evolution trends.AE energy is the most active in the crack development stage,and the Kaiser effect appears.With the progress of the loading process and the increase of steel fiber content,the proportion of shear cracks gradually increases,and the rise time/amplitude-count/duration(RA-AF)can be used to quantitatively characterize the failure characteristics of the core concretes.The evolution characteristics of b value can reflect the fracture process of concretes.The downward trend of the b value in the crack development stage can be used as important precursor information for the fracture and instability of the specimens.When the b value reaches the minimum and tends to be stable,the specimens undergo ultimate failure.
Keywords：steel fiber reinforced concreteglass fiber reinforced polymer tubedamage evolutionacoustic emissionmechanical property
Publication Date：2025-12-30
Online Publishing Date：2026-01-08(First online date of this platform, not the publication date of the document)
Pages：10( 1216-1225 )