Progress in the technique of upgrading metallic structures with advanced polymer composites

Hollaway, L.; Cadei, J.M.C.

doi:10.1002/pse.112

Cited by 292 publications

(107 citation statements)

References 30 publications

Supporting

Mentioning

106

Contrasting

Unclassified

Order By: Relevance

“…The use of CFRP wraps and strips was recently suggested for the reinforcement of steel structures [1][2][3]. Guidelines are also available [4,5] in order to help in the design of CFRP repaired steel structures.…”

Section: Problem Statementmentioning

confidence: 99%

Fatigue crack growth in CFRP-strengthened steel plates

Colombi

Fava

Sonzogni

2015

Composites Part B: Engineering

View full text Add to dashboard Cite

a b s t r a c tIn this paper fatigue crack growth in steel plates reinforced by using carbon fiber reinforced (CFRP) strips is investigated from the experimental, numerical and analytical point of view. Single edge notched tension (SENT) specimens were strengthened with different reinforcement configurations and tested at a stress ratio R of 0.4. Different initial damage levels were considered and the experimental results showed that the reinforcement application can effectively reduce the crack growth rate and significantly extend the fatigue life. Numerical models (finite elements) were also developed to evaluate the stress intensity factor (SIF) and the crack opening displacement (COD) profile. Based on the numerical results, an analytical model was proposed to predict the fatigue crack growth rate and the fatigue crack growth curves. The analytical results are validated by comparing the fatigue crack growth curves to the experimental ones.

show abstract

Section: Problem Statementmentioning

confidence: 99%

Fatigue crack growth in CFRP-strengthened steel plates

Colombi

Fava

Sonzogni

2015

Composites Part B: Engineering

View full text Add to dashboard Cite

show abstract

“…A fatigue strength analysis by Koller [29] based on the FKM-Guideline [1] of the welds concluded that the oscillating bending stresses would initiate fatigue cracks (that would grow some time till separation of the cross section) whatever quality the welds are manufactured. Conventional strengthening techniques that add steel plates by adhesive bonding, riveting, bolting, welding or clamping [30] were no option. Further structural investigations by Koller [29] showed, that the nominal alternating bending stresses increase due to stress concentrations at notches caused by riveting, bolting or welding.…”

Section: Field Applicationmentioning

confidence: 99%

CFRP-Strengthening and Long-Term Performance of Fatigue Critical Welds of a Steel Box Girder

et al. 2014

View full text Add to dashboard Cite

Empa's research efforts in the 1990s provided evidence that a considerable increase of the fatigue strength of welded aluminum beams can be achieved by externally bonding pultruded carbon fiber reinforced polymer (CFRP) laminates using rubber-toughened epoxies over the fatigue-weak welding zone on their tensile flange. The reinforcing effect obtained is determined by the stiffness of the unidirectional CFRP laminate which has twice the elastic modulus of aluminum. One can therefore easily follow that an unstressed CFRP laminate reinforcement of welded beams made of steel will not lead to a substantial increase in fatigue strength of the steel structure. This consideration led to the idea of prestressing an external reinforcement of the welded zone. The present investigation describes experimental studies to identify the adhesive system suitable for achieving high creep and fatigue strength of the prestressed CFRP patch. Experimental results (Wöhler-fields) of shear-lap-specimens and welded steel beams reinforced with prestressed CFRP laminates are presented. The paper concludes by presenting a field application, the reinforcement of a steel pendulum by adhesively bonded prestressed CFRP laminates to the tensile flanges of the welded box girder. Inspections carried out periodically on this structure revealed neither prestress losses nor crack initiation after nine years of service.

show abstract

“…More recently, some peculiar FRP features made the scientific community explore possible applications in reinforcing steel elements [1,2].…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of Carbon Fiber Jacketing of Steel Plates

Sessa¹,

Toraldo²,

Marmo³

et al. 2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

View full text Add to dashboard Cite

Abstract. It is presented a numerical assessment of experimental data concerning Mode-II delamination tests of steel plates jacketed with Carbon fiber textile sheets. In particular, an inverse identification procedure, based on finite element analysis, has been performed in order to estimate the constitutive parameters of the interface bonding steel and textile. Such a procedure proved to be capable of characterizing a constitutive model which reproduces with sufficient accuracy the peak load and the fracture triggering propagation of the bonding interface. The identified finite element model is accurate enough to be employed in force-based design or in structural analysis where a suitable displacement-ultimate limit state is considered.The contribution analyzes the physical interpretation of the Mode-II delamination process with particular focus on its representation by means of finite element models. In particular, a discussion about the delamination process will show the consistency of the finite element model with the physical behavior of the specimen observed during the experimental tests. Such considerations, although encouraging, introduced further issues which outlines future research directions in order to improve the identification strategy.

show abstract

Progress in the technique of upgrading metallic structures with advanced polymer composites

Cited by 292 publications

References 30 publications

Fatigue crack growth in CFRP-strengthened steel plates

Fatigue crack growth in CFRP-strengthened steel plates

CFRP-Strengthening and Long-Term Performance of Fatigue Critical Welds of a Steel Box Girder

Experimental Assessment of Carbon Fiber Jacketing of Steel Plates

Contact Info

Product

Resources

About