Title:Investigation of the Structural Behaviors of One-way HVFA-SCC Slabs Reinforced by GFRP Bars
Volume: 1
Issue: 1
Author(s): Lingzhu Zhou, Pengcheng Dong, Yu Zheng*, Gangbing Song and Xiaolu Wang
Affiliation:
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523080,China
Keywords:
One-way slabs, GFRP bars, HVFA-SCC, structural behaviors, theoretical models, fiber reinforced polymer bars.
Abstract:
Background: The corrosion of steel bar leads to the deterioration of structural behaviors,
high cost maintenance, shortened service life. The bridge deck structures constructed by Fiber Reinforced
Polymer (FRP) bars and High-Volume Fly Ash-Self-Compacting Concrete (HVFA-SCC) can
achieve low energy consumption, sustainable construction and high durability. However, the structural
behaviors of this bridge deck are still unclear.
Objective: The aim of this paper is to study the structural behaviors, including ultimate loads, failure
mode, cracking behavior, deflection and strain of one-way HVFA-SCC slabs reinforced with Glass-
FRP (GFRP).
Experimental: Eleven full-scale HVFA-SCC slabs, varying in reinforcement diameter, reinforcement
ratio, shear-span ratio, the type of reinforcing materials and concrete matrix materials, were
tested by using a four-point bending load.
Methods: The test results of tested specimens were compared with existing theoretical models, such
as crack load, ultimate bearing capacity, maximum crack width, maximum crack space and deflection
predicted model.
Results: The GFRP reinforced HVFA-SCC slab exhibits similar structural behaviors to the GFRP
reinforced NC slab. The maximum crack width of HVFA-SCC slab is significantly increased by
using GFRP bars with a diameter of 19 mm.
Conclusion: It is concluded that it is feasible to use HVFA-SCC instead of NC combined with
GFRP bars in bridge deck structures. The stress limit of concrete materials (0.45fc) is the main governing
factor for the service limit state (SLS) of GFRP reinforced HVFA-SCC slabs. The maximum
crack width of GFRP reinforced HVFA-SCC slabs can be predicted by using EHE-08 and GB
50608-2010 models.