Journal ArticleDOI
Debonding of concrete-epoxy interface under the coupled effect of moisture and sustained load
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In this article, a comprehensive experiment focusing on the coupled effect of sustained load and moisture on the bond property of concrete-epoxy interface is conducted, and it has been found that the effectiveness of entire strengthening or retrofitting scheme highly depends on the strength of the bond performance.Abstract:
Fiber reinforced polymer (FRP) is a prevalent material for strengthening or retrofitting concrete structures. It has been found that the effectiveness of entire strengthening or retrofitting scheme highly depends on the bond performance of concrete-epoxy interface. During service life, structures are exposed to complicated and unavoidable mechanical and environmental situations that can cause bond deterioration. In order to ensure the structural safety in a long run, a comprehensive experiment focusing on the coupled effect of sustained load and moisture on the bond property of concrete-epoxy interface is conducted. A drastic deterioration of concrete-epoxy interfacial fracture toughness, up to 77%, is observed under coupled sustained load and moisture exposure. Based on our experimental investigation, a predictive model is developed to describe the bond property variations of concrete-epoxy interface against long-term sustained load and moisture. The proposed predictive model can be used to obtain a more reliable and accurate service life prediction and maintenance planning for FRP-bonded concrete structures.read more
Citations
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Journal ArticleDOI
Nano-engineering of construction materials using molecular dynamics simulations: Prospects and challenges
TL;DR: In this paper, the applications of molecular dynamics simulations in understanding the fundamental deformation mechanism of various construction materials including concrete and cement, fiber-reinforced polymers and related bonded systems are presented.
Journal ArticleDOI
Fully probabilistic analysis of FRP-to-concrete bonded joints considering model uncertainty
TL;DR: In this article, the authors present a full reliability-based analysis framework for fiber-reinforced polymer (FRP)-to-concrete bonded joints considering model uncertainty, which improves the predictability of concrete strengthened with fiber composites and provides useful suggestions on their model uncertainties.
Journal ArticleDOI
Long term performance and fire safety aspect of FRP composites used in building structures
TL;DR: In this paper, the degradation of fiber reinforced polymer (FRP) composites, evaluation of interfacial integrity, and fire behavior of FRP-reinforced systems are discussed.
Journal ArticleDOI
Molecular dynamics simulations on adhesion of epoxy-silica interface in salt environment
TL;DR: In this paper, molecular dynamics simulations together with Bell's model are employed to evaluate the effect of sodium chloride solution on the adhesion at interface between epoxy and silica, which indicates that the bond deterioration at epoxy-concrete interface is critical in the presence of salt solution, which must be considered in the engineering design strategy for offshore and marine structures.
Journal ArticleDOI
Structural performance of FRP confined seawater concrete columns under chloride environment
TL;DR: In this paper, a design-oriented model is proposed to evaluate the stress-strain behavior of fiber reinforced polymer (FRP) confined seawater concrete, as well as concrete with elevated chloride concentrations due to prolonged service time in the marine environment.
References
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Journal ArticleDOI
Edge-Bonded Dissimilar Orthogonal Elastic Wedges Under Normal and Shear Loading
Journal ArticleDOI
Discussion: ``Edge-Bonded Dissimilar Orthogonal Elastic Wedges Under Normal and Shear Loading'' (Bogy, D. B., 1968, ASME J. Appl. Mech., 35, pp. 460-466)
Journal ArticleDOI
Full-range behavior of FRP-to-concrete bonded joints
TL;DR: In this article, a closed-form analytical solution is presented which is capable of predicting the entire debonding propagation process, in which the realistic bi-linear local bond slip law is employed.
Journal ArticleDOI
Kinking of A Crack Out of AN Interface
M.Y. He,John W. Hutchinson +1 more
TL;DR: In this paper, a plane strain crack out of the interface between two dissimilar isotropic elastic solids is analyzed and the stress intensity factors and energy release rate of the kinked crack in terms of the corresponding quantities for the interface crack prior to kinking.
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