Bond–slip models for double strap joints strengthened by CFRP

Fawzia, Sabrina; Zhao, Xiao‐Ling; Al-Mahaidi, Riadh

doi:10.1016/j.compstruct.2009.09.042

Cited by 166 publications

(78 citation statements)

References 11 publications

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“…In particular, Table 4 reports the measured thickness of the adhesive layer, considering that this parameter could have considerable effect on the bond behavior. In the present study it was found that in all cases with a thicker adhesive layer, the failure mode was mainly characterized by C-FRP delamination, thus being consistent with the results in the literature [21,22]. Table 3.…”

Section: Unwrapped Specimenssupporting

confidence: 80%

Experimental Tests on Steel Plate-to-Plate Splices Bonded by C-FRPS Laminas with and without Wrapping

2016

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Abstract:The results of an experimental investigation carried out on steel splices bonded by (Carbon-Fiber-Reinforced Polymers) C-FRPs are presented in this paper. The main aim of the study is to examine the influence of different parameters on the type of failure and on the ductility of splices. Different configurations of the specimens were considered, including butt and lapped joints using different arrangements for end anchorage of the bonded C-FRP laminas, such as (i) external bonding; and (ii) anchored jacketing with C-FRP sheets transversally wrapped to the longitudinal axis of the joints. The results in terms of failure modes and response curves are described and discussed, highlighting the potentiality of these types of bonded connections for metal structures. In particular, experimental results showed that (i) the failure modes exhibited by both butt and lapped wrapped splices were substantially similar; (ii) the wrapped anchoring is beneficial in order to achieve large deformations prior to failure, thus allowing a satisfactory ductility, even though a more timely installation process is necessary.

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Section: Unwrapped Specimenssupporting

confidence: 80%

Experimental Tests on Steel Plate-to-Plate Splices Bonded by C-FRPS Laminas with and without Wrapping

2016

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“…The total length of the specimen was 800mm, diameter was 38mm, and the thickness varies from 1.6mm to1.84mm. As no noticeable changes were reported because of small changes in steel tube thickness [4], the steel thickness of 1.84 mm was considered in all FE models for simplicity. In FE model different layers of CFRP was created as individual layers to find the load carrying capacity of each layer.…”

Section: Finite Element Analysis (Fea)mentioning

confidence: 99%

“…This review paper has covered wide area of CFRP strengthening of steel structure including hollow and concrete-filled steel tubes with external CFRP confinement. A comprehensive study on steel plates with double strap joint under tension has been done by the author Fawzia [3][4][5][6]. Although most columns should be in compression, sometimes they may be in tension under some load conditions such as wind uplift.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of CFRP Strengthened Steel Hollow Sections Under Tension

Fawzia

Shahanara²

2014

Volume 10 Number 4

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This paper presents a nonlinear finite element (FE) model for the analysis of very high strength (VHS) steel hollow sections wrapped by high modulus carbon fibre reinforced polymer (CFRP) sheets. The bond strength of CFRP wrapped VHS circular steel hollow section under tension is investigated using the FE model. The three dimensional FE model by Nonlinear static analysis has been carried out by Strand 7 finite element software. The model is validated by the experimental data obtained from Fawzia et al [1]. A detail parametric study has been performed to examine the effect of number of CFRP layers, different diameters of VHS steel tube and different bond lengths of CFRP sheet. The analytical model developed by Fawzia et al. [1] has been used to determine the load carrying capacity of different diameters of CFRP strengthened VHS steel tube by using the capacity from each layer of CFRP sheet. The results from FE model have found in reasonable agreement with the analytical model developed by Fawzia et al [1]. This validation was necessary because the analytical model by Fawzia et al [1] was developed by using only one diameter of VHS steel tube and fixed (five) number of CFRP layers. It can be concluded that the developed analytical model is valid for CFRP strengthened VHS steel tubes with diameter range of 38mm to 100mm and CFRP layer range of 3 to 5 layers. Based on the results it can also be concluded that the effective bond length is consistent for different diameters of steel tubes and different layers of CFRP. Three layers of CFRP is considered most effective wrapping scheme due to the cost effectiveness. Finally the distribution of longitudinal and hoop stress has been determined by the finite element model for different diameters of CFRP strengthened VHS steel tube.

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“…Investigations on bond strength made by Chao et al (2012), Chen et al (2001), Dai et al (2005), Ishikawa et al (2006), Lu et al (2007), Nozaka et al (2005) and Yu et al (2012) were both experimental and analytical works and proposed effective bond length to achieve perfect bonding for various static and dynamic loading conditions. Recent studies conducted by Fawzia et al (2005Fawzia et al ( -2010 The imperial mode can be developed by using stress based approach and is expressed in Eq. (3) 0.8…”

Section: Literature Review Bond Characteristics Between Cfrp and Steelmentioning

confidence: 99%

Axially Loaded Steel Columns Strengthened with CFRP

Kalavagunta

Naganathan²,

Mustapha³

2014

jjce

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During the recent decades, Carbon Fiber-Reinforced Polymer (CFRP) composite materials have proven valuable properties and suitability to be used in the construction of new buildings and in upgrading the existing ones. The objective of this paper is to review the previous work in this area and compare it with the current experimental results to show the design equations for CFRP strengthened steel structural elements. Research findings have shown that CFRP sheets and strips are not only effective in restoring the lost capacity of a damaged steel section, but are also quite effective in strengthening of steel sections to resist higher loads, extend their fatigue life and reduce crack propagation.

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Bond–slip models for double strap joints strengthened by CFRP

Cited by 166 publications

References 11 publications

Experimental Tests on Steel Plate-to-Plate Splices Bonded by C-FRPS Laminas with and without Wrapping

Experimental Tests on Steel Plate-to-Plate Splices Bonded by C-FRPS Laminas with and without Wrapping

Finite Element Analysis of CFRP Strengthened Steel Hollow Sections Under Tension

Axially Loaded Steel Columns Strengthened with CFRP

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