Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique
Abstract The durability performance of stainless steel makes it an interesting alternative for the structural strengthening of reinforced concrete. Like external steel plates or fibre reinforced polymers, stainless steel can be applied using externally bonded reinforcement (EBR) or the near surface...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-01-01
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| Series: | International Journal of Concrete Structures and Materials |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s40069-018-0229-8 |
| _version_ | 1818854187759304704 |
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| author | Hugo Biscaia Noel Franco Carlos Chastre |
| author_facet | Hugo Biscaia Noel Franco Carlos Chastre |
| author_sort | Hugo Biscaia |
| collection | DOAJ |
| description | Abstract The durability performance of stainless steel makes it an interesting alternative for the structural strengthening of reinforced concrete. Like external steel plates or fibre reinforced polymers, stainless steel can be applied using externally bonded reinforcement (EBR) or the near surface mounted (NSM) bonding techniques. In the present work, a set of single-lap shear tests were carried out using the EBR and NSM bonding techniques. The evaluation of the performance of the bonding interfaces was done with the help of the digital image correlation (DIC) technique. The tests showed that the measurements gathered with DIC should be used with caution, since there is noise in the distribution of the slips and only the slips greater than one-tenth of a millimetre were fairly well predicted. For this reason, the slips had to be smoothed out to make it easier to determine the strains in the stainless steel and the bond stress transfer between materials, which helps to determine the bond–slip relationship of the interface. Moreover, the DIC technique allowed to identify all the states developed within the interface through the load–slip responses which were also closely predicted with other monitoring devices. Considering the NSM and the EBR samples with the same bonded lengths, it can be stated that the NSM system has the best performance due to their higher strength, being observed the rupture of the stainless steel in the samples with bond lengths of 200 and 300 mm. Associated with this higher strength, the NSM specimens had an effective bond length of 168 mm which is 71.5% of that obtained for the EBR specimens (235 mm). A trapezoidal and a power functions are the proposed shapes to describe the interfacial bond–slip relationships of the NSM and EBR systems, respectively, where the maximum bond stress in the former system is 1.8 times the maximum bond stress of the latter one. |
| first_indexed | 2024-12-19T07:48:44Z |
| format | Article |
| id | doaj.art-635b03b6e9e34d8bbceb9e42b735712d |
| institution | Directory Open Access Journal |
| issn | 1976-0485 2234-1315 |
| language | English |
| last_indexed | 2024-12-19T07:48:44Z |
| publishDate | 2018-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Concrete Structures and Materials |
| spelling | doaj.art-635b03b6e9e34d8bbceb9e42b735712d2022-12-21T20:30:14ZengSpringerOpenInternational Journal of Concrete Structures and Materials1976-04852234-13152018-01-0112112010.1186/s40069-018-0229-8Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC TechniqueHugo Biscaia0Noel Franco1Carlos Chastre2Fluid and Structures Engineering, Research and Development Unit in Mechanical and Industrial Engineering, Department of Civil Engineering, Faculdade de Ciências e Tecnologia, Universidade Nova de LisboaDepartment of Civil Engineering, Faculdade de Ciências e Tecnologia, Universidade Nova de LisboaCivil Engineering Research and Innovation for Sustainability, Institute of Structural Engineering, Territory and Construction, Department of Civil Engineering, Faculdade de Ciências e Tecnologia, Universidade Nova de LisboaAbstract The durability performance of stainless steel makes it an interesting alternative for the structural strengthening of reinforced concrete. Like external steel plates or fibre reinforced polymers, stainless steel can be applied using externally bonded reinforcement (EBR) or the near surface mounted (NSM) bonding techniques. In the present work, a set of single-lap shear tests were carried out using the EBR and NSM bonding techniques. The evaluation of the performance of the bonding interfaces was done with the help of the digital image correlation (DIC) technique. The tests showed that the measurements gathered with DIC should be used with caution, since there is noise in the distribution of the slips and only the slips greater than one-tenth of a millimetre were fairly well predicted. For this reason, the slips had to be smoothed out to make it easier to determine the strains in the stainless steel and the bond stress transfer between materials, which helps to determine the bond–slip relationship of the interface. Moreover, the DIC technique allowed to identify all the states developed within the interface through the load–slip responses which were also closely predicted with other monitoring devices. Considering the NSM and the EBR samples with the same bonded lengths, it can be stated that the NSM system has the best performance due to their higher strength, being observed the rupture of the stainless steel in the samples with bond lengths of 200 and 300 mm. Associated with this higher strength, the NSM specimens had an effective bond length of 168 mm which is 71.5% of that obtained for the EBR specimens (235 mm). A trapezoidal and a power functions are the proposed shapes to describe the interfacial bond–slip relationships of the NSM and EBR systems, respectively, where the maximum bond stress in the former system is 1.8 times the maximum bond stress of the latter one.http://link.springer.com/article/10.1186/s40069-018-0229-8stainless steelconcretebond failuredigital image correlation |
| spellingShingle | Hugo Biscaia Noel Franco Carlos Chastre Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique International Journal of Concrete Structures and Materials stainless steel concrete bond failure digital image correlation |
| title | Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique |
| title_full | Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique |
| title_fullStr | Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique |
| title_full_unstemmed | Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique |
| title_short | Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique |
| title_sort | stainless steel bonded to concrete an experimental assessment using the dic technique |
| topic | stainless steel concrete bond failure digital image correlation |
| url | http://link.springer.com/article/10.1186/s40069-018-0229-8 |
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