Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint
Steel-concrete joints are often made by welded shear studs. However, this connection reduces the fatigue strength, especially in situations where locally concentrated loads occur with a large number of load cycles e.g. in bridge decks. In this paper the shear bond strength between steel and ultrahig...
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| Language: | English |
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Gruppo Italiano Frattura
2017-09-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1938 |
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| author | Wouter De Corte Peter Helincks Veerle Boel Jan Klusak Stanislav Seitl Geert De Schutter |
| author_facet | Wouter De Corte Peter Helincks Veerle Boel Jan Klusak Stanislav Seitl Geert De Schutter |
| author_sort | Wouter De Corte |
| collection | DOAJ |
| description | Steel-concrete joints are often made by welded shear studs. However, this connection reduces the fatigue strength, especially in situations where locally concentrated loads occur with a large number of load cycles e.g. in bridge decks. In this paper the shear bond strength between steel and ultrahigh performance concrete (UHPC) without welded mechanical shear connectors is evaluated through push-out tests and a generalized fracture mechanics approach based on analytical and finite element analyses. The connection is achieved by an epoxy adhesive layer gritted with granules. In the tests, specimens made with various manners of preparation of the epoxy interlayer are tested experimentally. Numerical-analytical 2D and 3D modelling of a steel-concrete connection is performed without and with the epoxy interlayer. The model of a bi-material notch with various geometrical and material properties is used to simulate various singular stress concentrators that can be responsible for failure initiation. Thus conditions of crack initiation can be predicted from knowledge of the standard mechanical and fracture-mechanics properties of particular materials. Results of the fracture-mechanics studies are compared with each other and with experimental results. On the basis of the comparison, the 2D simulation of the steel-concrete connection without the epoxy interlayer is shown to be suitable for the estimation of failure conditions. |
| format | Article |
| id | doaj-art-ccdc43f4ee6149069afc392f8b3583a5 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2017-09-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-ccdc43f4ee6149069afc392f8b3583a52025-01-03T00:40:25ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932017-09-011142Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete jointWouter De Corte0Peter Helincks1Veerle Boel2Jan Klusak3Stanislav Seitl4Geert De Schutter5Research Group Schoonmeersen, Department of Structural Engineering, Faculty of Engineering and Architecture, Ghent University Valentin Vaerwyckweg 1, B-9000, Ghent, Belgium.Research Group Schoonmeersen, Department of Structural Engineering, Faculty of Engineering and Architecture, Ghent University Valentin Vaerwyckweg 1, B-9000, Ghent, Belgium.Research Group Schoonmeersen, Department of Structural Engineering, Faculty of Engineering and Architecture, Ghent University Valentin Vaerwyckweg 1, B-9000, Ghent, Belgium.CEITEC IPM, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, Brno 616 62, Czech Republic.Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic.Magnel Laboratory for Concrete Research, Department of Structural Engineering, Faculty of Engineering and Architecture, Ghent University, Technologiepark-Zwijnaarde 904, B-9052, Ghent, Belgium.Steel-concrete joints are often made by welded shear studs. However, this connection reduces the fatigue strength, especially in situations where locally concentrated loads occur with a large number of load cycles e.g. in bridge decks. In this paper the shear bond strength between steel and ultrahigh performance concrete (UHPC) without welded mechanical shear connectors is evaluated through push-out tests and a generalized fracture mechanics approach based on analytical and finite element analyses. The connection is achieved by an epoxy adhesive layer gritted with granules. In the tests, specimens made with various manners of preparation of the epoxy interlayer are tested experimentally. Numerical-analytical 2D and 3D modelling of a steel-concrete connection is performed without and with the epoxy interlayer. The model of a bi-material notch with various geometrical and material properties is used to simulate various singular stress concentrators that can be responsible for failure initiation. Thus conditions of crack initiation can be predicted from knowledge of the standard mechanical and fracture-mechanics properties of particular materials. Results of the fracture-mechanics studies are compared with each other and with experimental results. On the basis of the comparison, the 2D simulation of the steel-concrete connection without the epoxy interlayer is shown to be suitable for the estimation of failure conditions.https://www.fracturae.com/index.php/fis/article/view/1938Fracture mechanicsSteel-concrete jointEpoxy adhesiveInterfacial propertiesPush-out testNumerical study |
| spellingShingle | Wouter De Corte Peter Helincks Veerle Boel Jan Klusak Stanislav Seitl Geert De Schutter Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint Fracture and Structural Integrity Fracture mechanics Steel-concrete joint Epoxy adhesive Interfacial properties Push-out test Numerical study |
| title | Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint |
| title_full | Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint |
| title_fullStr | Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint |
| title_full_unstemmed | Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint |
| title_short | Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint |
| title_sort | generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel concrete joint |
| topic | Fracture mechanics Steel-concrete joint Epoxy adhesive Interfacial properties Push-out test Numerical study |
| url | https://www.fracturae.com/index.php/fis/article/view/1938 |
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