Fibre-reinforced post-tensioned anchorage zone An experimental comparison of reinforcement configurations

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dc.contributor.authorBengtsson, Ludwig
dc.contributor.authorNordek, Anton
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)sv
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)en
dc.contributor.examinerGil Berrocal, Carlos
dc.contributor.supervisorRempling, Rasmus
dc.date.accessioned2024-07-01T12:15:47Z
dc.date.available2024-07-01T12:15:47Z
dc.date.issued2024
dc.date.submitted
dc.description.abstractPrestressed concrete enables the design and construction of long-span, slender, and economical concrete structures. In post-tensioned concrete structures, the anchorage zones are critical details, which normally end up both heavily reinforced and labour-intensive while following the manufacturer’s European Technical Assessment (ETA) approval for additional reinforcement and applicable design procedures. The upcoming Eurocode will permit the design of these regions using steel fibre reinforced concrete (SFRC). This master’s thesis presents an experimental comparison of three different post-tensioned anchorage zones: a conventionally designed anchorage zone made of reinforced concrete and ETA-approved helical bursting, an SFRC anchorage zone equipped with ETA-approved helical bursting reinforcement, and an SFRC anchorage zone. The anchorage zones are designed according to the applicable Eurocode, upcoming Eurocode and course literature. The final design of the specimens, representing anchorage zones, was validated by a non-linear finite element analysis in the softward Diana 10.8 to ensure the desirable structural response. Two specimens of each anchorage design were constructed and equipped with 3D-printed plastic spirals to support the distributed optical fiber sensors (DOFS). The specimens were tested experimentally by subjecting them to centric compressive loading. The configurations were evaluated and compared by analysing the data obtained from the DOFS, Digital Image Correlation (DIC), and load-deformation response. The comparison between DOFS measurements and DIC has shown that the proposed fiber optics arrangement enabled the assessment of the specimens’ structural response with high accuracy. According to the results, the plain SFRC configuration exhibits the largest strains and crack widths of the three configurations. Incorporating helical bursting reinforcement in SFRC significantly improved the structural response by decreasing the measured strains and crack widths. The reference configurations exhibited the lowest strains and smallest crack width while maintaining the highest consistency in the structural response. The findings in this master’s thesis will likely provide further knowledge and enhance the contemporary design for post-tensioned anchorage zones.
dc.identifier.coursecodeACEX30
dc.identifier.urihttp://hdl.handle.net/20.500.12380/308182
dc.language.isoeng
dc.setspec.uppsokTechnology
dc.subjectPost-tensioned concrete, Anchorage zone, Steel fibre reinforced concrete, Distributed optical fiber sensing, Digital Image Correlation, DIC, Crack monitoring
dc.titleFibre-reinforced post-tensioned anchorage zone An experimental comparison of reinforcement configurations
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster's Thesisen
dc.type.uppsokH
local.programmeStructural engineering and building technology (MPSEB), MSc
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