|Table of Contents|

Experiment on Flexural Behavior of GFRP Profile-concrete Composite Beams(PDF)

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

Issue:
2021年02期
Page:
79-89
Research Field:
Publishing date:

Info

Title:
Experiment on Flexural Behavior of GFRP Profile-concrete Composite Beams
Author(s):
HUANG Hai-lin1; 2;  ZHOU Fu-lin1;  YAN Xing1;  LI Ao1;  HUANG Shu3
1. School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China; 2. Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control, Hunan University of Science and Technology, Xiangtan 4
Keywords:
GFRP profile;  composite beam;  static test;  failure mechanism;  interface slip;  flexural bearing capacity
PACS:
U443,TU398
DOI:
10.19815/j.jace.2020.05034
Abstract:
In order to study the flexural behavior of glass fiber reinforced polymer(GFRP)profile-concrete composite beam under static load, the upper flange of GFRP I-shaped profiles was buried in concrete slabs and the three-point loading flexural behavior test of 8 GFRP profile-concrete composite beams were completed. The crack distribution rule, load-span deflection curve, load-strain curve and load-slip curve were obtained. The influences of interface connection method and profile thickness on the bending failure mechanism, bending capacity and normal section ductility of composite beams were analyzed. By comparing and analyzing the variation rule of section strain, mid-span deflection, and interface relative slip of composite beam, the feasibility of placing the upper flange of GFRP I-shaped profile in the concrete slab as the shear connectors was verified. The results show that the interface connection methods of sand blasting on the contact surface and bolts set on the flange of the GFRP profile can significantly reduce the interface relative slip between the GFRP profile and the concrete slab, thereby improve the overall working performance of the composite beam. The thickness of the GFRP profile has no obvious effect on the bearing capacity of the specimen, but when the thickness of the profile is increased by 48%, its deflection can be reduced by about 20%. The calculation can provide a reference for the theoretical analysis and practical engineering application of the composite beam.

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Last Update: 2021-03-20