Interaction of Polymer Flexible Joint with Concrete Elements in an Uniaxial Tensile Test

Zdanowicz, Łukasz; Kwiecień, Arkadiusz; Tekieli, Marcin; Seręga, Szymon

doi:10.1007/978-3-319-59471-2_122

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Micro-cracks around the main crack are closed by the PFJ, when the flexible polymer repair is applied [155,156]. Closing of micro-cracks in cracked concrete has been presented by Zdanowicz et al [157,158], using Digital Image Correlation (DIC) method [159] applied to a tensioned and damaged concrete element repaired by PFJ. Obtained maps of strain distribution highlighted strain concentrations appearing in concrete just before damage.…”

Section: 4mechanical Closing Of Micro-cracks In Concretementioning

confidence: 99%

External treatments for the preventive repair of existing constructions: A review

Sánchez

Faria

Ferrara

et al. 2018

Construction and Building Materials

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In the present paper different external surface treatments published in the literature as preventive solutions for improving the performance of existing concrete constructions are presented and discussed. They are categorized as repair materials for concrete conservation, protection surface methods against moisture and aggressive agent penetration, injection techniques for crack sealing and preventive repair solutions with smart functionalities. In a final section, the most extended testing methods for evaluating the effectiveness of the different repair solutions are summarized depending on the property to be enhanced: moisture control and resistance against penetration of aggressive agents. The review shows that although several possibilities exist for the repair of the existing constructions, there is a lack of comparative analysis between the different methodologies. SARCOS COST Action stablishes as scientific objectives to carry out comparative studies including the most advanced solutions for the external repair of concrete, giving criteria for effectiveness assessment and defining robust and reliable methods for charactering the performance of the repaired structures.

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Section: 4mechanical Closing Of Micro-cracks In Concretementioning

confidence: 99%

External treatments for the preventive repair of existing constructions: A review

Sánchez

Faria

Ferrara

et al. 2018

Construction and Building Materials

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“…The bricks RossoVivo A6R55W were of the following dimensions: 250 mm long, 120 mm wide, and 55 mm thick (the same as those used in RILEM TC250 and RILEM TC223 experiments [6,13,39]). The strengthening systems were made from a combination of carbon textile, two various steel textiles or CFRP laminates with four various adhesives: epoxy based (Sikadur 330 and Sikadur 30) [23], polyurethane (PS) [15], and polyurethane (PT) [40]. These were applied following unidirectional strengthening composites (50 mm-wide): carbon (FIDCARBON UNI 320 HT240) textile and steel (FIDSTEEL 3X2-B 12-12-500 [6,41] and Kerakoll GeoSteel G2000) [42] textiles (Figure 1).…”

Section: Laboratory Testsmentioning

confidence: 99%

Flexible Adhesive in Composite-to-Brick Strengthening—Experimental and Numerical Study

et al. 2018

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This paper investigates composite-to-brick strengthening systems with flexible adhesive made of polyurethane (Carbon Fibre Reinforced Polyurethane (CFRPU) and Steel Reinforced Polyurethane (SRPU)) and epoxy resin (Carbon Fibre Reinforced Polymer (CFRP) and Steel Reinforced Polymer (SRP). The specimens were tested in a single lap shear test (SLST). LVDT displacement transducers (LVDT -Linear Variable Differential Transformer) and digital image correlation method (DIC) based measurement systems were used to measure displacements and strains. The obtained results were applied in a numerical analysis of the 3D model of the SLST specimen, with flexible adhesives modeled as a hyper-elastic model. The DIC and LVDT based systems demonstrated a good correlation. Experimental and numerical analysis confirmed that composite-to-brick strengthening systems with flexible adhesives are more effective on brittle substrates than stiff ones, as they are able to reduce stress concentrations and more evenly distribute stress along the entire bonded length, thus having a higher load carrying capacity.

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“…Several types of PFJ are available, with tensile strength ranging from 1.7 to 20 MPa, and elongation at rupture between 10% and 120%. Currently, PFJ research is focused on the application of PM-type, PS-type, and PT-type polyurethanes, which can be used as injection or prefabricated elements, named also as PUFJ (PolyUrethane Flexible Joints) [ 3 , 17 , 18 , 19 ]. The PM-type has the lowest and the PT-type the highest values of stiffness and strength, while the properties of the PS-type are between the other two types.…”

Section: Introductionmentioning

confidence: 99%

Polymer Flexible Joint as a Repair Method of Concrete Elements: Flexural Testing and Numerical Analysis

et al. 2020

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Polymer Flexible Joint (PFJ) is a method for repairs of concrete elements, which enables carrying loads and large deformations effectively. This article presents the possibility of applying PFJ on beams subjected to bending and describes the influence of such joints on concrete elements. An experimental investigation was conducted to determine the behavior of concrete in a four-point bending test. The research program included flexural tests of plain concrete elements with a notch, as well as tests of elements which were repaired with PFJ after failure. Based on the experimental results, the numerical characteristics of analyzed polymer and concrete were calibrated. A nonlinear numerical model is developed, which describes the behavior of concrete elements and polymer in the experiments. The model is used to numerically analyze deformations and stresses under increasing load. The influence of flexible joint on concrete elements is described and behavior of elements repaired with PFJ is compared to original elements. Particular attention was paid to the stress redistribution in concrete. The application of flexible joint positively influences load capacity of the connected concrete elements. Furthermore, because of stress redistribution, connected elements can bear larger deformations than original ones. PFJ can therefore be considered an efficient repair method for connecting concrete elements.

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Interaction of Polymer Flexible Joint with Concrete Elements in an Uniaxial Tensile Test

Cited by 3 publications

References 5 publications

External treatments for the preventive repair of existing constructions: A review

External treatments for the preventive repair of existing constructions: A review

Flexible Adhesive in Composite-to-Brick Strengthening—Experimental and Numerical Study

Polymer Flexible Joint as a Repair Method of Concrete Elements: Flexural Testing and Numerical Analysis

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