2 edition of Behaviour of FRP-to-FRP and FRP-to-concrete bond. found in the catalog.
Behaviour of FRP-to-FRP and FRP-to-concrete bond.
Thesis (M.A.Sc.) -- University of Toronto, 2003.
|Series||Canadian theses = -- Thèses canadiennes|
|The Physical Object|
|Pagination||5 microfiches : negative.|
Subtropical natural exposure may significantly affect the bonding behavior of fiber reinforced polymer (FRP) externally bonded to concrete. To study the effect of subtropical natural climates on the FRP-concrete interface, natural exposure tests and an analytical approach were carried out on specimens externally bonded with carbon fiber reinforced polymer (CFRP) and basalt fiber reinforced. The following literature review is a brief summary of the literature which has been collected to date. Information has been gathered from various published papers and books on the subjects of FRP-to-concrete bond behaviour and the performance of FRP and steel reinforced concrete members under static and impact loading.
FRP-to-concrete interface reaches 6, Ô. Cai () studied the bond behavior between CFRP sheets and concrete at temperatures ranging from 4 oC to oC. An increase was seen in the average ultimate load by about 35% for specimens tested at 40 oC over specimens tested at ambient temperature (i.e. 4 . This thesis investigates the bond behaviour between Fiber Reinforced Polymer (FRP) reinforcement and concrete. Two experimental programs were conducted. In the ﬁrst program the role of the variables which aﬀect the bond behaviour (re-bar diameter, type of ﬁbres, surface treatment and concrete strength) was studied with 88 pullout tests.
tests on FRP-to-concrete epoxy joints in order to evaluate the interface behavior by reproducing the situation of the cut-off section in strengthened beams where stress concentrations arise. However, largely scattered results have been obtained for bond strength due to different testing methods adopted by the various researchers. The bond behaviour will be examined under impact loading through a series of controlled experiments. The performance of this interface between FRP and concrete is of key importance to the behaviour of the strengthened structure as it allows for the transfer of stress to the FRP.
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Damage plasticity theory is Behaviour of FRP-to-FRP and FRP-to-concrete bond. book to model concrete material and the pull-off test of EB-FRP-to-concrete joints is simulated by FEM to study the interfacial behavior. Debonding process, failure mechanism, local bond strength distribution, and characteristics of the local bond Cited by: 8.
1. Introduction. External bonding of fiber-reinforced polymer (FRP) plates (including both wet layup and pultruded plates) has been widely used to enhance the flexural or shear strength of reinforced concrete (RC) members.The effectiveness of the external bonding technique highly depends on the bond behavior of FRP-to-concrete interfaces, and strengthening applications using this Cited by: 1.
Adhesive bond behavior between FRP and concrete has been extensively investigated over the last two decades. FRP tends to move, or slip, relative to the concrete substrate when subjected to a pull load F, as shown in Fig.
The adhesive resistance of the interface is mobilized by the FRP slipping, with a typical bond stress τ a vs. slip s relationship (Fig. 3a).Cited by: 6.
The FRP-to-concrete bond behaviour has been extensively investigated experimentally, commonly using the pull-off test of FRP-to-concrete bonded joint. Comparatively, much less research has been concerned with the numerical simulation of this bond behaviour, chiefly due to difficulties in accurately modelling the complex behaviour of by: 6.
the FRP-to-concrete bond behavior as a truly predictive model. However, numerical studies on the bond behavior using this ap-proach have beenvery limited, mainly because of challenges in the.
The FRP-to-concrete bond behavior has been extensively investigated experimentally, commonly using a single or double shear test of the FRP-to-concrete bonded joint. Comparatively, much less research has been concerned with numerical simulation, chiefly due to difficulties in the accurate modeling of the complex behavior of concrete.
Furthermore, some analytical models of bond-slip behavior are examined to assess their adequacy to reproduce the experimental bond behavior. In particular, the investigation focuses on the reliability of the well-known model by Malvar (the first one dedicated to FRP reinforcements) as well as on the model by Eligehausen, Popov, and Bertero.
This paper presents a preliminary finite element study on the effects of strain rate on the FRP-to-concrete bond behaviour using the K&C concrete damage model in LS-DYNA Explicit.
The developed FE model uses the first-order eight-node hexahedron 3D solid element with one integration point and a sub-millimetre mesh.
Results show that the model can simulate the static FRP-to-concrete bond. The bond behaviour between the FRP and concrete plays a critical role in a strengthening system with externally bonded FRP.
However, the understanding of how the bond between FRP and concrete performs under high strain rate is severely limited. Characteristics of FRP-to-concrete bond are observed to deteriorate under cyclic loads.
Deterioration has been observed under load conditions which result in a stress range in the bonded FRP of only 4% of the material capacity. Current design recommendations and “accepted practice” often neglect this detrimental effect.
Title: Enhancing FRP-to-concrete Bond Behavior by Epoxy Ribs Author(s): Cheng Jiang, Baolin Wan and John Omboko Publication: Symposium Paper Volume: Issue: Appears on pages(s): Keywords: concrete; FRP; bond; grooving; epoxy rib; bond-slip relationship Date: 11/1/ Abstract: The bond between external bonding (EB) of fiber reinforced polymer (FRP) composite materials to.
It is discovered for the first time that dilation of concrete plays an important role in the FRP-to-concrete bond behaviour. This has led to the development of a model relating the shear dilation factor to the concrete strength based on the modelling of a large number of static FRP-to-concrete shear tests, forming the basis for dynamic modelling.
The test results in Shi et al.  showed that the bond behavior of FRP to concrete interface is sensitive to the strain rate, and the interfacial fracture energy, maximum FRP strain and maximum. The FRP-to-concrete bond behavior has been extensively investigated experimentally, commonly using the single or double shear test of FRP-to-concrete bonded joint.
Comparatively, much less research has been concerned with the numerical simulation, chiefly due to difficulties in the accurate modeling of the complex behavior of concrete.
As mentioned above, the main failure mode of FRP-to-concrete bonded joints in the shear tests is concrete failure. Therefore, the mechanical performances of concrete play a dominant role in the bond behavior.
Additionally, the bond behavior can be also affected by the geometric and material properties of FRP and the adhesive. behavior and modeling of bond of frp rebars to concrete In the field of reinforced-concrete (RC) structures, the use of fiber reinforced plastic rebars (FRP rebars) as an alternative to the steel reinforcements appears very promising, especially if such structures are exposed to.
more limited. In an FRP-to-steel bonded joint, the weak link is the epoxy adhesive, while in an FRP-to-concrete bonded joint, the concrete is the weak link.
This paper examines, through a series of pull-off tests in which the FRP-to-steel interface is subjected to direct shear, the parameters that affect the behaviour of FRP-to-steel bonded joints. The behaviour of bond between FRP and concrete is a key factor controlling the behaviour of concrete structures strengthened with FRP composites.
This article presents an experimental study on the bond shear strength between FRP and concrete using a near-end supported (NES) single-shear pull test. The test results are found to be in close agreement with the predictions of Chen and Teng's [J.
behavior of the bond between externally bonded fiber reinforced polymer (FRP) and concrete. This paper presents an analytical solution for the full-range deformation process of FRP-to-concrete bonded joints under combined thermal and mechanical loadings. The solution is based on a bilinear bond-slip model and leads to closed-form expressions.
The. To develop a state-of-the-art report on the behaviour and modelling of the bond between FRP and concrete within three years; Deliverables: Proceedings of two international workshops in or and respectively; State-of-the-art report presenting a review of existing knowledge and design recommendations in ; Annual reports.
The bond behaviour between FRP (fibre-reinforced polymer) and concrete is a consideration in the design of FRP strengthening mechanisms for structurally deficient or functionally obsolete concrete structures.
In the past, a number of empirical models and fracture mechanics based theoretical models have been proposed for determining the effective bond length and bond strength of FRP sheets.Bond of FRP to Concrete Systems, Part b ACI Spring Convention April 3 - 7, Tampa, FL ACI WEB SESSIONS ACI Web Sessions The audio for this web session will begin momentarily and will play in its entirety along with the slides.
However, if you wish to skip to the next speaker, use the scroll.• FRP-to-concrete width ratio bp/b c • adhesive axial stiffness Eata, and • adhesive compressive strength fa. Interface Stresses The interface stresses influence bond behaviour and thus the mode of failure.
These stresses have been investigated primarily in relation to “ripping” failure in externally strengthened beams. Peeling.