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http://dx.doi.org/10.12989/cac.2017.20.2.215

A model for the restrained shrinkage behavior of concrete bridge deck slabs reinforced with FRP bars  

Ghatefar, Amir (Department of Civil Engineering, Urmia Branch, Islamic Azad University)
ElSalakawy, Ehab (Department of Civil Engineering, University of Manitoba)
Bassuoni, Mohamed T. (Department of Civil Engineering, University of Manitoba)
Publication Information
Computers and Concrete / v.20, no.2, 2017 , pp. 215-227 More about this Journal
Abstract
A finite element model (FEM) for predicting early-age behavior of reinforced concrete (RC) bridge deck slabs with fiber-reinforced polymer (FRP) bars is presented. In this model, the shrinkage profile of concrete accounted for the effect of surrounding conditions including air flow. The results of the model were verified against the experimental test results, published by the authors. The model was verified for cracking pattern, crack width and spacing, and reinforcement strains in the vicinity of the crack using different types and ratios of longitudinal reinforcement. The FEM was able to predict the experimental results within 6 to 10% error. The verified model was utilized to conduct a parametric study investigating the effect of four key parameters including reinforcement spacing, concrete cover, FRP bar type, and concrete compressive strength on the behavior of FRP-RC bridge deck slabs subjected to restrained shrinkage at early-age. It is concluded that a reinforcement ratio of 0.45% carbon FRP (CFRP) can control the early-age crack width and reinforcement strain in CFRP-RC members subjected to restrained shrinkage. Also, the results indicate that changing the bond-slippage characteristics (sand-coated and ribbed bars) or concrete cover had an insignificant effect on the early-age crack behavior of FRP-RC bridge deck slabs subjected to shrinkage. However, reducing bar spacing and concrete strength resulted in a decrease in crack width and reinforcement strain.
Keywords
GFRP; concrete; deck slabs; early-age cracking; finite element modeling; serviceability;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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